#seismology — Public Fediverse posts

Mw 8.2 Tehuantepec, Mexico Earthquake Rupture Segmentation And A Plate Boundary Revealed By A Relocated Machine Learning Based Aftershock Catalog
--
https://doi.org/10.22541/essoar.15009650/v1 <-- shared paper
--
https://www.science.org/content/article/unusual-mexico-earthquake-may-have-relieved-stress-seismic-gap <-- shared 2017 technical article
--
H/T @Allen Husker | Research Professor and Manager of the Southern California Seismic Network
“The 2017 Mw8.2 Tehuantepec earthquake is the largest instrumentally recorded normal faulting earthquake in Mexico. It occurred offshore on a reactivated outer rise fault within the Tehuantepec megathrust seismic gap that is within the undefined intersection of the North American & Caribbean & Cocos plates. [The authors] analyze[d] a relocated machine learning generated aftershock catalog that used data from temporary and permanent seismic stations around the Gulf of Tehuantepec to further interpret the rupture process of this earthquake. Similar to other results, [they found] that the earthquake initiated 100 km offshore, running northwest 90 km into the intersection. [Their] findings then show that the rupture jumped 10 km inland as it crossed the trench-perpendicular Tehuantepec Ridge and continued another 60 km before stopping. [They] used finite fault inversions to distinguish between different possibilities for how the fault ruptured. A two-plane normal fault model offset at ridge, best represents the slip. Moment tensors reveal that the first section before the Ridge was highly complex with a large mix of moment tensors. After the jump across the Ridge, the earthquakes are solely thrust mechanism for 60 km. This indicates that the normal slip on the second half of the fault rupture probably over-slipped and the aftershocks represent the stress accommodation. There was a separate N-S trending divergent region at the location where the Tehuantepec earthquake stopped. [They] interpret this to be a break between the remaining sliver of the Caribbean plate and the North American plate…”
#geology #risk #hazard #earthquake #Tehuantepec #Mexico #faulting #offshore #structuralgeology #megathrust #platetectonics #AI #machinelearning #model #modeling #seismic #seismology #GulfofTehuantepec #spatial #spatialanalysis #rupture #impacts #thrust #normalfaulting #aftershocks

Mw 8.2 Tehuantepec, Mexico Earthquake Rupture Segmentation And A Plate Boundary Revealed By A Relocated Machine Learning Based Aftershock Catalog
--
https://doi.org/10.22541/essoar.15009650/v1 <-- shared paper
--
https://www.science.org/content/article/unusual-mexico-earthquake-may-have-relieved-stress-seismic-gap <-- shared 2017 technical article
--
H/T @Allen Husker | Research Professor and Manager of the Southern California Seismic Network
“The 2017 Mw8.2 Tehuantepec earthquake is the largest instrumentally recorded normal faulting earthquake in Mexico. It occurred offshore on a reactivated outer rise fault within the Tehuantepec megathrust seismic gap that is within the undefined intersection of the North American & Caribbean & Cocos plates. [The authors] analyze[d] a relocated machine learning generated aftershock catalog that used data from temporary and permanent seismic stations around the Gulf of Tehuantepec to further interpret the rupture process of this earthquake. Similar to other results, [they found] that the earthquake initiated 100 km offshore, running northwest 90 km into the intersection. [Their] findings then show that the rupture jumped 10 km inland as it crossed the trench-perpendicular Tehuantepec Ridge and continued another 60 km before stopping. [They] used finite fault inversions to distinguish between different possibilities for how the fault ruptured. A two-plane normal fault model offset at ridge, best represents the slip. Moment tensors reveal that the first section before the Ridge was highly complex with a large mix of moment tensors. After the jump across the Ridge, the earthquakes are solely thrust mechanism for 60 km. This indicates that the normal slip on the second half of the fault rupture probably over-slipped and the aftershocks represent the stress accommodation. There was a separate N-S trending divergent region at the location where the Tehuantepec earthquake stopped. [They] interpret this to be a break between the remaining sliver of the Caribbean plate and the North American plate…”
#geology #risk #hazard #earthquake #Tehuantepec #Mexico #faulting #offshore #structuralgeology #megathrust #platetectonics #AI #machinelearning #model #modeling #seismic #seismology #GulfofTehuantepec #spatial #spatialanalysis #rupture #impacts #thrust #normalfaulting #aftershocks

Mw 8.2 Tehuantepec, Mexico Earthquake Rupture Segmentation And A Plate Boundary Revealed By A Relocated Machine Learning Based Aftershock Catalog
--
https://doi.org/10.22541/essoar.15009650/v1 <-- shared paper
--
https://www.science.org/content/article/unusual-mexico-earthquake-may-have-relieved-stress-seismic-gap <-- shared 2017 technical article
--
H/T @Allen Husker | Research Professor and Manager of the Southern California Seismic Network
“The 2017 Mw8.2 Tehuantepec earthquake is the largest instrumentally recorded normal faulting earthquake in Mexico. It occurred offshore on a reactivated outer rise fault within the Tehuantepec megathrust seismic gap that is within the undefined intersection of the North American & Caribbean & Cocos plates. [The authors] analyze[d] a relocated machine learning generated aftershock catalog that used data from temporary and permanent seismic stations around the Gulf of Tehuantepec to further interpret the rupture process of this earthquake. Similar to other results, [they found] that the earthquake initiated 100 km offshore, running northwest 90 km into the intersection. [Their] findings then show that the rupture jumped 10 km inland as it crossed the trench-perpendicular Tehuantepec Ridge and continued another 60 km before stopping. [They] used finite fault inversions to distinguish between different possibilities for how the fault ruptured. A two-plane normal fault model offset at ridge, best represents the slip. Moment tensors reveal that the first section before the Ridge was highly complex with a large mix of moment tensors. After the jump across the Ridge, the earthquakes are solely thrust mechanism for 60 km. This indicates that the normal slip on the second half of the fault rupture probably over-slipped and the aftershocks represent the stress accommodation. There was a separate N-S trending divergent region at the location where the Tehuantepec earthquake stopped. [They] interpret this to be a break between the remaining sliver of the Caribbean plate and the North American plate…”
#geology #risk #hazard #earthquake #Tehuantepec #Mexico #faulting #offshore #structuralgeology #megathrust #platetectonics #AI #machinelearning #model #modeling #seismic #seismology #GulfofTehuantepec #spatial #spatialanalysis #rupture #impacts #thrust #normalfaulting #aftershocks

Mw 8.2 Tehuantepec, Mexico Earthquake Rupture Segmentation And A Plate Boundary Revealed By A Relocated Machine Learning Based Aftershock Catalog
--
https://doi.org/10.22541/essoar.15009650/v1 <-- shared paper
--
https://www.science.org/content/article/unusual-mexico-earthquake-may-have-relieved-stress-seismic-gap <-- shared 2017 technical article
--
H/T @Allen Husker | Research Professor and Manager of the Southern California Seismic Network
“The 2017 Mw8.2 Tehuantepec earthquake is the largest instrumentally recorded normal faulting earthquake in Mexico. It occurred offshore on a reactivated outer rise fault within the Tehuantepec megathrust seismic gap that is within the undefined intersection of the North American & Caribbean & Cocos plates. [The authors] analyze[d] a relocated machine learning generated aftershock catalog that used data from temporary and permanent seismic stations around the Gulf of Tehuantepec to further interpret the rupture process of this earthquake. Similar to other results, [they found] that the earthquake initiated 100 km offshore, running northwest 90 km into the intersection. [Their] findings then show that the rupture jumped 10 km inland as it crossed the trench-perpendicular Tehuantepec Ridge and continued another 60 km before stopping. [They] used finite fault inversions to distinguish between different possibilities for how the fault ruptured. A two-plane normal fault model offset at ridge, best represents the slip. Moment tensors reveal that the first section before the Ridge was highly complex with a large mix of moment tensors. After the jump across the Ridge, the earthquakes are solely thrust mechanism for 60 km. This indicates that the normal slip on the second half of the fault rupture probably over-slipped and the aftershocks represent the stress accommodation. There was a separate N-S trending divergent region at the location where the Tehuantepec earthquake stopped. [They] interpret this to be a break between the remaining sliver of the Caribbean plate and the North American plate…”
#geology #risk #hazard #earthquake #Tehuantepec #Mexico #faulting #offshore #structuralgeology #megathrust #platetectonics #AI #machinelearning #model #modeling #seismic #seismology #GulfofTehuantepec #spatial #spatialanalysis #rupture #impacts #thrust #normalfaulting #aftershocks

Bradyseism (Volcanology 🌋)

Bradyseism is the gradual uplift or descent of part of the Earth's surface caused by the filling or emptying of an underground magma chamber or hydrothermal activity, particularly in volcanic calderas. It can persist for millennia in between eruptions and each uplift event is normally accompanied by thousands of small to moderate earthquakes. The word derives from the anc...

https://en.wikipedia.org/wiki/Bradyseism

#Bradyseism #Seismology #Volcanology #Geomorphology

Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico
--
https://doi.org/10.1029/2025JF008847 <-- shared paper
--
https://youtu.be/aJFe_1Bzuis?si=VKoDcMABB3y-fqWb <-- shared USGS 2022 presentation video, ‘Landslides triggered by Hurricane Maria - Assessment of an extreme event in Puerto Rico’
--
https://doi.org/10.5194/nhess-25-1229-2025 <-- shared research article
--
H/T @Jonathan Perkins | Research Geologist at U.S. Geological Survey (USGS)
“How do changes to critical zone strength and structure change how hillslopes fail during extreme storms?
Hurricane Maria triggered over 70,000 landslides across Puerto Rico in 2017. Along the hardest-hit region, in the granitic watersheds in the Cordillera Central, [the authors] utilized a natural experiment where a sharp weathering gradient follows a knickzone migrating upstream into an ancient shoreline platform.
These changes in the local balance between erosion rates and weathering rates let us [all] ask how changes in the critical zone control landslide susceptibility, size, and failure style.
[They] used an array of methods:
• Landslide mapping (pre- and post- Hurricane Maria)
• Field geophysics (seismic/resistivity) and geotechnical (DCP) surveys
• Stream profile inversion calibrated with cosmogenic 10Be samples
• 3D back-analysis of hillslope strength
And found that:
• Less weathered hillslopes produced more landslides per slope despite being substantially stronger because they store more water in the shallow subsurface that makes them hydrologically responsive during storms
• Stronger hillslopes lead to steeper first- and second-order streams that enhance debris-flow growth and coalescence, which has significant downstream impacts on communities along the floodplains
…”.
#Landslides #massmovement #extremeweather #Geomorphology #NaturalHazards #PuertoRico #USGS #Hurricane #Maria #infrastructure #damage #cost #economics #CriticalZoneSusceptibility #risk #hazard #UtuadoBatholith #Cordillera #granite #water #hydrology #weathering #erosion #knickzone #mapping #spatial #spatialanalysis #spatiotemporal #elevation #slope #geology #soils #remotesensing #geophysics #resistivity #seismology #failure #cosmogenic #10Be #model #modeling #groundwater #saturated #subsurface #engineering #geology #debrisflow #rainfall #precipitation #humanimpacts #communities
@USGS

Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico
--
https://doi.org/10.1029/2025JF008847 <-- shared paper
--
https://youtu.be/aJFe_1Bzuis?si=VKoDcMABB3y-fqWb <-- shared USGS 2022 presentation video, ‘Landslides triggered by Hurricane Maria - Assessment of an extreme event in Puerto Rico’
--
https://doi.org/10.5194/nhess-25-1229-2025 <-- shared research article
--
H/T @Jonathan Perkins | Research Geologist at U.S. Geological Survey (USGS)
“How do changes to critical zone strength and structure change how hillslopes fail during extreme storms?
Hurricane Maria triggered over 70,000 landslides across Puerto Rico in 2017. Along the hardest-hit region, in the granitic watersheds in the Cordillera Central, [the authors] utilized a natural experiment where a sharp weathering gradient follows a knickzone migrating upstream into an ancient shoreline platform.
These changes in the local balance between erosion rates and weathering rates let us [all] ask how changes in the critical zone control landslide susceptibility, size, and failure style.
[They] used an array of methods:
• Landslide mapping (pre- and post- Hurricane Maria)
• Field geophysics (seismic/resistivity) and geotechnical (DCP) surveys
• Stream profile inversion calibrated with cosmogenic 10Be samples
• 3D back-analysis of hillslope strength
And found that:
• Less weathered hillslopes produced more landslides per slope despite being substantially stronger because they store more water in the shallow subsurface that makes them hydrologically responsive during storms
• Stronger hillslopes lead to steeper first- and second-order streams that enhance debris-flow growth and coalescence, which has significant downstream impacts on communities along the floodplains
…”.
#Landslides #massmovement #extremeweather #Geomorphology #NaturalHazards #PuertoRico #USGS #Hurricane #Maria #infrastructure #damage #cost #economics #CriticalZoneSusceptibility #risk #hazard #UtuadoBatholith #Cordillera #granite #water #hydrology #weathering #erosion #knickzone #mapping #spatial #spatialanalysis #spatiotemporal #elevation #slope #geology #soils #remotesensing #geophysics #resistivity #seismology #failure #cosmogenic #10Be #model #modeling #groundwater #saturated #subsurface #engineering #geology #debrisflow #rainfall #precipitation #humanimpacts #communities
@USGS

Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico
--
https://doi.org/10.1029/2025JF008847 <-- shared paper
--
https://youtu.be/aJFe_1Bzuis?si=VKoDcMABB3y-fqWb <-- shared USGS 2022 presentation video, ‘Landslides triggered by Hurricane Maria - Assessment of an extreme event in Puerto Rico’
--
https://doi.org/10.5194/nhess-25-1229-2025 <-- shared research article
--
H/T @Jonathan Perkins | Research Geologist at U.S. Geological Survey (USGS)
“How do changes to critical zone strength and structure change how hillslopes fail during extreme storms?
Hurricane Maria triggered over 70,000 landslides across Puerto Rico in 2017. Along the hardest-hit region, in the granitic watersheds in the Cordillera Central, [the authors] utilized a natural experiment where a sharp weathering gradient follows a knickzone migrating upstream into an ancient shoreline platform.
These changes in the local balance between erosion rates and weathering rates let us [all] ask how changes in the critical zone control landslide susceptibility, size, and failure style.
[They] used an array of methods:
• Landslide mapping (pre- and post- Hurricane Maria)
• Field geophysics (seismic/resistivity) and geotechnical (DCP) surveys
• Stream profile inversion calibrated with cosmogenic 10Be samples
• 3D back-analysis of hillslope strength
And found that:
• Less weathered hillslopes produced more landslides per slope despite being substantially stronger because they store more water in the shallow subsurface that makes them hydrologically responsive during storms
• Stronger hillslopes lead to steeper first- and second-order streams that enhance debris-flow growth and coalescence, which has significant downstream impacts on communities along the floodplains
…”.
#Landslides #massmovement #extremeweather #Geomorphology #NaturalHazards #PuertoRico #USGS #Hurricane #Maria #infrastructure #damage #cost #economics #CriticalZoneSusceptibility #risk #hazard #UtuadoBatholith #Cordillera #granite #water #hydrology #weathering #erosion #knickzone #mapping #spatial #spatialanalysis #spatiotemporal #elevation #slope #geology #soils #remotesensing #geophysics #resistivity #seismology #failure #cosmogenic #10Be #model #modeling #groundwater #saturated #subsurface #engineering #geology #debrisflow #rainfall #precipitation #humanimpacts #communities
@USGS

Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico
--
https://doi.org/10.1029/2025JF008847 <-- shared paper
--
https://youtu.be/aJFe_1Bzuis?si=VKoDcMABB3y-fqWb <-- shared USGS 2022 presentation video, ‘Landslides triggered by Hurricane Maria - Assessment of an extreme event in Puerto Rico’
--
https://doi.org/10.5194/nhess-25-1229-2025 <-- shared research article
--
H/T @Jonathan Perkins | Research Geologist at U.S. Geological Survey (USGS)
“How do changes to critical zone strength and structure change how hillslopes fail during extreme storms?
Hurricane Maria triggered over 70,000 landslides across Puerto Rico in 2017. Along the hardest-hit region, in the granitic watersheds in the Cordillera Central, [the authors] utilized a natural experiment where a sharp weathering gradient follows a knickzone migrating upstream into an ancient shoreline platform.
These changes in the local balance between erosion rates and weathering rates let us [all] ask how changes in the critical zone control landslide susceptibility, size, and failure style.
[They] used an array of methods:
• Landslide mapping (pre- and post- Hurricane Maria)
• Field geophysics (seismic/resistivity) and geotechnical (DCP) surveys
• Stream profile inversion calibrated with cosmogenic 10Be samples
• 3D back-analysis of hillslope strength
And found that:
• Less weathered hillslopes produced more landslides per slope despite being substantially stronger because they store more water in the shallow subsurface that makes them hydrologically responsive during storms
• Stronger hillslopes lead to steeper first- and second-order streams that enhance debris-flow growth and coalescence, which has significant downstream impacts on communities along the floodplains
…”.
#Landslides #massmovement #extremeweather #Geomorphology #NaturalHazards #PuertoRico #USGS #Hurricane #Maria #infrastructure #damage #cost #economics #CriticalZoneSusceptibility #risk #hazard #UtuadoBatholith #Cordillera #granite #water #hydrology #weathering #erosion #knickzone #mapping #spatial #spatialanalysis #spatiotemporal #elevation #slope #geology #soils #remotesensing #geophysics #resistivity #seismology #failure #cosmogenic #10Be #model #modeling #groundwater #saturated #subsurface #engineering #geology #debrisflow #rainfall #precipitation #humanimpacts #communities
@USGS

#TheAsahiShimbun:
"
Chubu Electric chiefs to resign over false data at nuclear plant
"
".. manipulation in at least 208 of 225 earthquake assessments at the Hamaoka nuclear power plant .."

".. multiple employees raised concerns internally, but those objections were suppressed."

https://www.asahi.com/ajw/articles/16886384

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheAsahiShimbun:
"
Chubu Electric chiefs to resign over false data at nuclear plant
"
".. manipulation in at least 208 of 225 earthquake assessments at the Hamaoka nuclear power plant .."

".. multiple employees raised concerns internally, but those objections were suppressed."

https://www.asahi.com/ajw/articles/16886384

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheAsahiShimbun:
"
Chubu Electric chiefs to resign over false data at nuclear plant
"
".. manipulation in at least 208 of 225 earthquake assessments at the Hamaoka nuclear power plant .."

".. multiple employees raised concerns internally, but those objections were suppressed."

https://www.asahi.com/ajw/articles/16886384

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheAsahiShimbun:
"
Chubu Electric chiefs to resign over false data at nuclear plant
"
".. manipulation in at least 208 of 225 earthquake assessments at the Hamaoka nuclear power plant .."

".. multiple employees raised concerns internally, but those objections were suppressed."

https://www.asahi.com/ajw/articles/16886384

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheMainichi:

Chubu Electric ..

".. will withdraw its applications for regulatory screening to restart reactors at the Hamaoka nuclear power plant ..after an investigative report on data-tampering was released. .."

".. manipulation of seismic data by the utility during screening for the restart of the Nos. 3 and 4 reactors .."

https://mainichi.jp/english/articles/20260914/p2g/00m/0bu/046000c

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheMainichi:

Chubu Electric ..

".. will withdraw its applications for regulatory screening to restart reactors at the Hamaoka nuclear power plant ..after an investigative report on data-tampering was released. .."

".. manipulation of seismic data by the utility during screening for the restart of the Nos. 3 and 4 reactors .."

https://mainichi.jp/english/articles/20260914/p2g/00m/0bu/046000c

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheMainichi:

Chubu Electric ..

".. will withdraw its applications for regulatory screening to restart reactors at the Hamaoka nuclear power plant ..after an investigative report on data-tampering was released. .."

".. manipulation of seismic data by the utility during screening for the restart of the Nos. 3 and 4 reactors .."

https://mainichi.jp/english/articles/20260914/p2g/00m/0bu/046000c

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

#TheMainichi:

Chubu Electric ..

".. will withdraw its applications for regulatory screening to restart reactors at the Hamaoka nuclear power plant ..after an investigative report on data-tampering was released. .."

".. manipulation of seismic data by the utility during screening for the restart of the Nos. 3 and 4 reactors .."

https://mainichi.jp/english/articles/20260914/p2g/00m/0bu/046000c

14.9.2026

#AKW #Atomkraft #Atomkraftwerk #ChubuElectric #Chuden #Hamaoka #HamaokaNPP #Japan #Kernenergie #NPP #NuclearPower #Seismology

HAZUS Estimated Average Annualized Losses for Earthquakes in the United States and its Territories [FEMA]
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-earthquake-loss-report_082026.pdf <-- shared document/report
--
https://www.fema.gov/flood-maps/tools-resources/flood-map-products/HAZUS/resources/loss-studies <-- shared resource, ‘National HAZUS Natural Hazard Loss Studies’
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-overview_082026.pdf <-- shared document, ‘Informing Earthquake Risk with FEMA P-366 - Overview of the Report and How to Use It’
--
http://alturl.com/rzafx <-- shared web map & data portal, ‘HAZUS - P-366 Earthquake Risk/Loss Severity Viewer’
--
H/T @Kishor Jaiswal
“The study reveals that the United States faces $15.8 billion per year in average annualized earthquake losses - an increase of about 7% since the 2023 update, largely driven by rising property values and growth in hazard prone areas. Yet the message is not all caution: modern seismic codes are working, with states like California seeing ~15% reductions in expected losses thanks to improved building practices.
This update incorporates the 2023 USGS National Seismic Hazard Model, new population and building stock data, and advancements in HAZUS 6.1, offering communities a clearer picture of where risk is rising—and where targeted mitigation, such as retrofitting older unreinforced masonry and non ductile concrete buildings, can deliver substantial benefits.
BOTTOM LINE: Earthquake risk is evolving, but smarter design, science-informed planning, and focused mitigation continue to shift the nation toward greater resilience…”
#HAZUS #risk #hazard #naturalhazard #earthquake #geology #loss #cost #economics #development #infrastructure #buildingcodes #engineeringdesign #seismic #seismiccodes #seismology #USGS #NationalSeismicHazardModel #NSHM #population #demographics #hazardanalysis #mitigation #riskreduction #earthquakerisk #spatialanalysis #spatiotemporal #policy #planning #GIS #spatial #mapping #parameters #naturalhazard #USA #national #humanimpacts #P366 #EstimatedAnnualizedEarthquakeLosses #metrics #buildingexposure #opendata #model #modeling #assets #economicloss #SpectralAcceleration #AverageAnnualizedLoss #AverageAnnualizedLossRatios
#FEMA | #USGS

HAZUS Estimated Average Annualized Losses for Earthquakes in the United States and its Territories [FEMA]
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-earthquake-loss-report_082026.pdf <-- shared document/report
--
https://www.fema.gov/flood-maps/tools-resources/flood-map-products/HAZUS/resources/loss-studies <-- shared resource, ‘National HAZUS Natural Hazard Loss Studies’
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-overview_082026.pdf <-- shared document, ‘Informing Earthquake Risk with FEMA P-366 - Overview of the Report and How to Use It’
--
http://alturl.com/rzafx <-- shared web map & data portal, ‘HAZUS - P-366 Earthquake Risk/Loss Severity Viewer’
--
H/T @Kishor Jaiswal
“The study reveals that the United States faces $15.8 billion per year in average annualized earthquake losses - an increase of about 7% since the 2023 update, largely driven by rising property values and growth in hazard prone areas. Yet the message is not all caution: modern seismic codes are working, with states like California seeing ~15% reductions in expected losses thanks to improved building practices.
This update incorporates the 2023 USGS National Seismic Hazard Model, new population and building stock data, and advancements in HAZUS 6.1, offering communities a clearer picture of where risk is rising—and where targeted mitigation, such as retrofitting older unreinforced masonry and non ductile concrete buildings, can deliver substantial benefits.
BOTTOM LINE: Earthquake risk is evolving, but smarter design, science-informed planning, and focused mitigation continue to shift the nation toward greater resilience…”
#HAZUS #risk #hazard #naturalhazard #earthquake #geology #loss #cost #economics #development #infrastructure #buildingcodes #engineeringdesign #seismic #seismiccodes #seismology #USGS #NationalSeismicHazardModel #NSHM #population #demographics #hazardanalysis #mitigation #riskreduction #earthquakerisk #spatialanalysis #spatiotemporal #policy #planning #GIS #spatial #mapping #parameters #naturalhazard #USA #national #humanimpacts #P366 #EstimatedAnnualizedEarthquakeLosses #metrics #buildingexposure #opendata #model #modeling #assets #economicloss #SpectralAcceleration #AverageAnnualizedLoss #AverageAnnualizedLossRatios
#FEMA | #USGS

HAZUS Estimated Average Annualized Losses for Earthquakes in the United States and its Territories [FEMA]
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-earthquake-loss-report_082026.pdf <-- shared document/report
--
https://www.fema.gov/flood-maps/tools-resources/flood-map-products/HAZUS/resources/loss-studies <-- shared resource, ‘National HAZUS Natural Hazard Loss Studies’
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-overview_082026.pdf <-- shared document, ‘Informing Earthquake Risk with FEMA P-366 - Overview of the Report and How to Use It’
--
http://alturl.com/rzafx <-- shared web map & data portal, ‘HAZUS - P-366 Earthquake Risk/Loss Severity Viewer’
--
H/T @Kishor Jaiswal
“The study reveals that the United States faces $15.8 billion per year in average annualized earthquake losses - an increase of about 7% since the 2023 update, largely driven by rising property values and growth in hazard prone areas. Yet the message is not all caution: modern seismic codes are working, with states like California seeing ~15% reductions in expected losses thanks to improved building practices.
This update incorporates the 2023 USGS National Seismic Hazard Model, new population and building stock data, and advancements in HAZUS 6.1, offering communities a clearer picture of where risk is rising—and where targeted mitigation, such as retrofitting older unreinforced masonry and non ductile concrete buildings, can deliver substantial benefits.
BOTTOM LINE: Earthquake risk is evolving, but smarter design, science-informed planning, and focused mitigation continue to shift the nation toward greater resilience…”
#HAZUS #risk #hazard #naturalhazard #earthquake #geology #loss #cost #economics #development #infrastructure #buildingcodes #engineeringdesign #seismic #seismiccodes #seismology #USGS #NationalSeismicHazardModel #NSHM #population #demographics #hazardanalysis #mitigation #riskreduction #earthquakerisk #spatialanalysis #spatiotemporal #policy #planning #GIS #spatial #mapping #parameters #naturalhazard #USA #national #humanimpacts #P366 #EstimatedAnnualizedEarthquakeLosses #metrics #buildingexposure #opendata #model #modeling #assets #economicloss #SpectralAcceleration #AverageAnnualizedLoss #AverageAnnualizedLossRatios
#FEMA | #USGS

HAZUS Estimated Average Annualized Losses for Earthquakes in the United States and its Territories [FEMA]
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-earthquake-loss-report_082026.pdf <-- shared document/report
--
https://www.fema.gov/flood-maps/tools-resources/flood-map-products/HAZUS/resources/loss-studies <-- shared resource, ‘National HAZUS Natural Hazard Loss Studies’
--
https://www.fema.gov/sites/default/files/documents/fema_HAZUS_p-366-overview_082026.pdf <-- shared document, ‘Informing Earthquake Risk with FEMA P-366 - Overview of the Report and How to Use It’
--
http://alturl.com/rzafx <-- shared web map & data portal, ‘HAZUS - P-366 Earthquake Risk/Loss Severity Viewer’
--
H/T @Kishor Jaiswal
“The study reveals that the United States faces $15.8 billion per year in average annualized earthquake losses - an increase of about 7% since the 2023 update, largely driven by rising property values and growth in hazard prone areas. Yet the message is not all caution: modern seismic codes are working, with states like California seeing ~15% reductions in expected losses thanks to improved building practices.
This update incorporates the 2023 USGS National Seismic Hazard Model, new population and building stock data, and advancements in HAZUS 6.1, offering communities a clearer picture of where risk is rising—and where targeted mitigation, such as retrofitting older unreinforced masonry and non ductile concrete buildings, can deliver substantial benefits.
BOTTOM LINE: Earthquake risk is evolving, but smarter design, science-informed planning, and focused mitigation continue to shift the nation toward greater resilience…”
#HAZUS #risk #hazard #naturalhazard #earthquake #geology #loss #cost #economics #development #infrastructure #buildingcodes #engineeringdesign #seismic #seismiccodes #seismology #USGS #NationalSeismicHazardModel #NSHM #population #demographics #hazardanalysis #mitigation #riskreduction #earthquakerisk #spatialanalysis #spatiotemporal #policy #planning #GIS #spatial #mapping #parameters #naturalhazard #USA #national #humanimpacts #P366 #EstimatedAnnualizedEarthquakeLosses #metrics #buildingexposure #opendata #model #modeling #assets #economicloss #SpectralAcceleration #AverageAnnualizedLoss #AverageAnnualizedLossRatios
#FEMA | #USGS

https://www.europesays.com/ch/127751/ Frictional weakening in the highly mobile 2025 Blatten rock and ice avalanche in Switzerland #EarthSciences #Environment #General #NaturalHazards #seismology #Switzerland

What Really Happened During the 2026 Nepal Disaster? Via @whatdamath #Science #Geology #RocksForJocks #EarthScience #seismology 🔭🔬🧪🥼🧑‍🔬 youtu.be/5gded8dJO4Y?...

What Really Happened During th...

What Really Happened During the 2026 Nepal Disaster? Via @whatdamath #Science #Geology #RocksForJocks #EarthScience #seismology 🔭🔬🧪🥼🧑‍🔬 youtu.be/5gded8dJO4Y?...

What Really Happened During th...

What Really Happened During the 2026 Nepal Disaster? Via @whatdamath #Science #Geology #RocksForJocks #EarthScience #seismology 🔭🔬🧪🥼🧑‍🔬 youtu.be/5gded8dJO4Y?...

What Really Happened During th...

What Really Happened During the 2026 Nepal Disaster? Via @whatdamath #Science #Geology #RocksForJocks #EarthScience #seismology 🔭🔬🧪🥼🧑‍🔬 youtu.be/5gded8dJO4Y?...

What Really Happened During th...

https://www.europesays.com/ie/663425/ Hidden Deep Beneath Mars, Scientists Find Evidence of a Vast Magmatic System #Éire #Geology #IE #Ireland #Mars #PlanetaryScience #Science #Seismology #Space #UniversityOfOxford

2026-08-27 21:07:38 M6.0 Eastern Gulf of Aden

#earthquake #seismology #geology #raspberryshake #raspberrypi #nature #citizenscience

2026-08-27 21:07:38 M6.0 Eastern Gulf of Aden

#earthquake #seismology #geology #raspberryshake #raspberrypi #nature #citizenscience

2026-08-27 21:07:38 M6.0 Eastern Gulf of Aden

#earthquake #seismology #geology #raspberryshake #raspberrypi #nature #citizenscience

2026-08-27 21:07:38 M6.0 Eastern Gulf of Aden

#earthquake #seismology #geology #raspberryshake #raspberrypi #nature #citizenscience

2/2

Here is an article ( .pdf ) - published just a few months ago in the GFZ’s own journal, "System Erde" - that addresses precisely such events and describes what would need to be done to create a warning system.

https://gfzpublic.gfz.de/rest/items/item_5038877/component/file_5039211/content

#climatechange
#climate
#geology
#seismology

Anyone who can read is clearly at an advantage... and anyone who then also reads the English full section will also find the above-mentioned .pdf in English 😊

https://media.gfz.de/gfz/wv/pm/26/20260827_GLOF-Early-Warning-1.pdf

2/2

Here is an article ( .pdf ) - published just a few months ago in the GFZ’s own journal, "System Erde" - that addresses precisely such events and describes what would need to be done to create a warning system.

https://gfzpublic.gfz.de/rest/items/item_5038877/component/file_5039211/content

#climatechange
#climate
#geology
#seismology

2/2

Here is an article ( .pdf ) - published just a few months ago in the GFZ’s own journal, "System Erde" - that addresses precisely such events and describes what would need to be done to create a warning system.

https://gfzpublic.gfz.de/rest/items/item_5038877/component/file_5039211/content

#climatechange
#climate
#geology
#seismology

Anyone who can read is clearly at an advantage... and anyone who then also reads the English full section will also find the above-mentioned .pdf in English 😊

https://media.gfz.de/gfz/wv/pm/26/20260827_GLOF-Early-Warning-1.pdf

RE: https://mastodon.social/@unijena/117162403759276775

🇪🇺 📈 📉

When I say " Germany has a geologically active volcano ", everyone looks at me weird – now I'll also tell you that the #Alps are #tectonically active ..... 😁

Increased tectonic activity, particularly in western #Slovenia and on the edge of the Southern Alps

#geology #seismology #earthquake

RE: https://mastodon.social/@unijena/117162403759276775

🇪🇺 📈 📉

When I say " Germany has a geologically active volcano ", everyone looks at me weird – now I'll also tell you that the #Alps are #tectonically active ..... 😁

Increased tectonic activity, particularly in western #Slovenia and on the edge of the Southern Alps

#geology #seismology #earthquake

RE: https://mastodon.social/@unijena/117162403759276775

🇪🇺 📈 📉

When I say " Germany has a geologically active volcano ", everyone looks at me weird – now I'll also tell you that the #Alps are #tectonically active ..... 😁

Increased tectonic activity, particularly in western #Slovenia and on the edge of the Southern Alps

#geology #seismology #earthquake

RE: https://mastodon.social/@unijena/117162403759276775

🇪🇺 📈 📉

When I say " Germany has a geologically active volcano ", everyone looks at me weird – now I'll also tell you that the #Alps are #tectonically active ..... 😁

Increased tectonic activity, particularly in western #Slovenia and on the edge of the Southern Alps

#geology #seismology #earthquake

Seismic waves from nuclear tests (knowing a precise location removes a source of error) travelling through the outer core suggest there is an anomalous blob of stuff moving about:

"rapid variations in P-wave speed in the outer core indicate rigorous mixing, potentially involving locally concentrated light elements or suspended solid [!!!] in the outer core."

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026JB033798

#geology #seismology #earthscience

Seismic waves from nuclear tests (knowing a precise location removes a source of error) travelling through the outer core suggest there is an anomalous blob of stuff moving about:

"rapid variations in P-wave speed in the outer core indicate rigorous mixing, potentially involving locally concentrated light elements or suspended solid [!!!] in the outer core."

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026JB033798

#geology #seismology #earthscience

Seismic waves from nuclear tests (knowing a precise location removes a source of error) travelling through the outer core suggest there is an anomalous blob of stuff moving about:

"rapid variations in P-wave speed in the outer core indicate rigorous mixing, potentially involving locally concentrated light elements or suspended solid [!!!] in the outer core."

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026JB033798

#geology #seismology #earthscience

Seismic waves from nuclear tests (knowing a precise location removes a source of error) travelling through the outer core suggest there is an anomalous blob of stuff moving about:

"rapid variations in P-wave speed in the outer core indicate rigorous mixing, potentially involving locally concentrated light elements or suspended solid [!!!] in the outer core."

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026JB033798

#geology #seismology #earthscience

Thunderquakes refer to seismic waves produced by thunder—acoustic waves from the atmosphere coupling into the ground—which can be recorded and used as a novel source for seismic imaging of the Earth's subsurface.
#Geosciences #Seismology #Meteorology #sflorg
https://www.sflorg.com/2026/08/es08222601.html

Thunderquakes refer to seismic waves produced by thunder—acoustic waves from the atmosphere coupling into the ground—which can be recorded and used as a novel source for seismic imaging of the Earth's subsurface.
#Geosciences #Seismology #Meteorology #sflorg
https://www.sflorg.com/2026/08/es08222601.html

Thunderquakes refer to seismic waves produced by thunder—acoustic waves from the atmosphere coupling into the ground—which can be recorded and used as a novel source for seismic imaging of the Earth's subsurface.
#Geosciences #Seismology #Meteorology #sflorg
https://www.sflorg.com/2026/08/es08222601.html

Thunderquakes refer to seismic waves produced by thunder—acoustic waves from the atmosphere coupling into the ground—which can be recorded and used as a novel source for seismic imaging of the Earth's subsurface.
#Geosciences #Seismology #Meteorology #sflorg
https://www.sflorg.com/2026/08/es08222601.html

https://www.europesays.com/ch/117944/ Tectonics and Deglaciation Govern Eastern-Southern Alps at Slow Rates #Alps #EarthScience #earthquakes #faults #PlateTectonics #seismology #Tectonics

Magnitude 7.7 earthquake near Flores, Indonesia, and eastern Quebec is shaking, 15,000 km away.

#RaspberryShake #Seismology #Quebec

Magnitude 7.7 earthquake near Flores, Indonesia, and eastern Quebec is shaking, 15,000 km away.

#RaspberryShake #Seismology #Quebec

Magnitude 7.7 earthquake near Flores, Indonesia, and eastern Quebec is shaking, 15,000 km away.

#RaspberryShake #Seismology #Quebec

Magnitude 7.7 earthquake near Flores, Indonesia, and eastern Quebec is shaking, 15,000 km away.

#RaspberryShake #Seismology #Quebec

Labquake (Geology ⛰️)

A laboratory earthquake, commonly referred to as a labquake, is a small-scale failure event in rock generated and studied within controlled environments. These non-hazardous events are engineered to mimic the physical conditions of the Earth's crust, allowing experimentalists to directly observe fault nucleation, rupture propagation, and friction dynamics that are obse...

https://en.wikipedia.org/wiki/Labquake

#Labquake #Geology #Geophysics #Seismology #FractureMechanics

2026-08-10 12:34:28 M7.4 Colombia

An intra-slab quake where the Nazca plate subducts beneath the South America plate.

USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000tjl2/executive

Shawn Willsey's video on it: https://youtu.be/6uYIieruUVA

Another biggie - 4th biggest wobble of the year.

#earthquake #seismology #geology #columbia #raspberrypi #raspberryshake #citizenscience

2026-08-10 12:34:28 M7.4 Colombia

An intra-slab quake where the Nazca plate subducts beneath the South America plate.

USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000tjl2/executive

Shawn Willsey's video on it: https://youtu.be/6uYIieruUVA

Another biggie - 4th biggest wobble of the year.

#earthquake #seismology #geology #columbia #raspberrypi #raspberryshake #citizenscience

2026-08-10 12:34:28 M7.4 Colombia

An intra-slab quake where the Nazca plate subducts beneath the South America plate.

USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000tjl2/executive

Shawn Willsey's video on it: https://youtu.be/6uYIieruUVA

Another biggie - 4th biggest wobble of the year.

#earthquake #seismology #geology #columbia #raspberrypi #raspberryshake #citizenscience

2026-08-01 04:49:01 M5.6 Vancouver Island, Canada Region

as seen on my raspberryshake in #Perthshire

#earthquake #seismology #canada #vancouverisland #citizenscience #raspberrypi #raspberryshake

2026-08-01 04:49:01 M5.6 Vancouver Island, Canada Region

as seen on my raspberryshake in #Perthshire

#earthquake #seismology #canada #vancouverisland #citizenscience #raspberrypi #raspberryshake

2026-08-01 04:49:01 M5.6 Vancouver Island, Canada Region

as seen on my raspberryshake in #Perthshire

#earthquake #seismology #canada #vancouverisland #citizenscience #raspberrypi #raspberryshake

2026-07-31 00:31:15 M3.2 North Sea

Only 1km shallow...

#earthquake #seismology #geology #northsea #citizenscience #raspberrypi #raspberryshake

2026-07-31 00:31:15 M3.2 North Sea

Only 1km shallow...

#earthquake #seismology #geology #northsea #citizenscience #raspberrypi #raspberryshake