#seismicwaves — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #seismicwaves, aggregated by home.social.
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Convection Inside the Mantle
Most of what we know about Earth’s interior comes from observing how seismic waves–mostly from earthquakes–bounce around. As our observations have gotten better–more seisometers, better imaging techniques–scientists have identified two large anomalies sitting near the bottom of the mantle. Known as large low-velocity provinces, or LLVPs, these zones take up continent-sized areas beneath parts of Africa and the Pacific.
Seismic waves show lower speeds in large, continent-sized zones that sit beneath Africa and the Pacific. These large low-velocity provinces (LLVPs) are outlined in red.The LLVPs are hot, which would normally make them buoyant, but their stationary nature suggests they are made up of extremely dense material. Narrow plumes of hot material make their way up from the LLVPs to form volcanic hotspots like those that made the Hawaiian and Galapagos Islands. Balancing that upward convection is the downward convection of former tectonic material carried into the mantle at subduction zones.
What the LLVPs are made of remains an active research question. One suggestion is that they contain remnants of Theia, the planet thought to have impacted the proto-Earth to form our Moon. (Image credits: E. Garnero and C. Richardson; see also Physics Today)
Illustration showing convection in the Earth’s inner mantle. Former tectonic material subducts downward in dark blue zones. The large low-velocity provinces (LLVPs) are shown in orange. Hot-spot volcanic activity is seen at the surface (black triangles) above narrow plumes that lift material from the LLVPs toward the surface. #buoyancy #convection #fluidDynamics #geophysics #mantleConvection #physics #science #seismicWaves -
Convection Inside the Mantle
Most of what we know about Earth’s interior comes from observing how seismic waves–mostly from earthquakes–bounce around. As our observations have gotten better–more seisometers, better imaging techniques–scientists have identified two large anomalies sitting near the bottom of the mantle. Known as large low-velocity provinces, or LLVPs, these zones take up continent-sized areas beneath parts of Africa and the Pacific.
Seismic waves show lower speeds in large, continent-sized zones that sit beneath Africa and the Pacific. These large low-velocity provinces (LLVPs) are outlined in red.The LLVPs are hot, which would normally make them buoyant, but their stationary nature suggests they are made up of extremely dense material. Narrow plumes of hot material make their way up from the LLVPs to form volcanic hotspots like those that made the Hawaiian and Galapagos Islands. Balancing that upward convection is the downward convection of former tectonic material carried into the mantle at subduction zones.
What the LLVPs are made of remains an active research question. One suggestion is that they contain remnants of Theia, the planet thought to have impacted the proto-Earth to form our Moon. (Image credits: E. Garnero and C. Richardson; see also Physics Today)
Illustration showing convection in the Earth’s inner mantle. Former tectonic material subducts downward in dark blue zones. The large low-velocity provinces (LLVPs) are shown in orange. Hot-spot volcanic activity is seen at the surface (black triangles) above narrow plumes that lift material from the LLVPs toward the surface. #buoyancy #convection #fluidDynamics #geophysics #mantleConvection #physics #science #seismicWaves -
3 major earthquakes in Venezuela and Japan were felt in Kentucky
Seismologists say three major earthquakes thousands of miles away were felt in Kentucky. On Friday, the Kentucky Geological…
#EuropeSays #Japan #JP #earthquakes #FayetteCounty #Kentucky #KentuckyGeologicalSurvey #magnitude7.2earthquake #Nihon #seismicstation #seismicwaves #venezuela
https://www.europesays.com/japan/48200/ -
The history of tsunami-causing earthquakes in Japan – Sciworthy
In 2011, miles of rock shifted deep underwater in the Japan Trench, causing an earthquake that deformed the…
#EuropeSays #Japan #JP #earthquakes #JapanTrench #Nihon #platetectonics #scicomm #Sciencenews #seismicwaves #Tsunamis
https://www.europesays.com/japan/38869/ -
🫨 Detecting PKP seismic waves at 17,640 km distance with a low-cost ADXL355 accelerometer seismograph.
Article explaining the detection of distant earthquakes with a Raspberry PI 2B and a low-cost ADXL355 accelerometer👇
#earthquake #seismicwaves #seismicdetection #seismograph #seismology, #sismograf, #terremoto, #terremotos, #acelerometro, #sismografo, #raspberry, #rapsberrypi, #analogdevices
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What caused the Mysterious Seismic Waves Recorded in September 2023
In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............
#ClimateChange #Dicksonfjord #Eartquake #Fjord #Globalwarmimg #Greenland #Polarice #Seismicwaves
SCIEU Team -
What caused the Mysterious Seismic Waves Recorded in September 2023
In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............
#ClimateChange #Dicksonfjord #Eartquake #Fjord #Globalwarmimg #Greenland #Polarice #Seismicwaves
SCIEU Team -
What caused the Mysterious Seismic Waves Recorded in September 2023
In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............
#ClimateChange #Dicksonfjord #Eartquake #Fjord #Globalwarmimg #Greenland #Polarice #Seismicwaves
SCIEU Team -
What caused the Mysterious Seismic Waves Recorded in September 2023
In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............
#ClimateChange #Dicksonfjord #Eartquake #Fjord #Globalwarmimg #Greenland #Polarice #Seismicwaves
SCIEU Team -
What caused the Mysterious Seismic Waves Recorded in September 2023
In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............
#ClimateChange #Dicksonfjord #Eartquake #Fjord #Globalwarmimg #Greenland #Polarice #Seismicwaves
SCIEU Team -
Rapid Response Seafloor Seismology [USGS]
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https://www.usgs.gov/news/featured-story/rapid-response-seafloor-seismology <-- shared technical article
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#GIS #spatial #mapping #geology #earthquakes #monitoring #remotesensing #geohazards #marine #massmovement #geology #engineeringgeology #tsunami #volcano #risk #hazard #forecasting #seafloor #seismology #hazardmaps #models #modeling #mitigation #seismograph #seismicwaves #instrumentation #underwater #remote #tectonics
@USGS -
Rapid Response Seafloor Seismology [USGS]
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https://www.usgs.gov/news/featured-story/rapid-response-seafloor-seismology <-- shared technical article
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#GIS #spatial #mapping #geology #earthquakes #monitoring #remotesensing #geohazards #marine #massmovement #geology #engineeringgeology #tsunami #volcano #risk #hazard #forecasting #seafloor #seismology #hazardmaps #models #modeling #mitigation #seismograph #seismicwaves #instrumentation #underwater #remote #tectonics
@USGS -
Mars Has Lots of Water, But It’s Out of Reach https://www.universetoday.com/168107/mars-has-lots-of-water-but-its-out-of-reach/ #seismicexperimentforinteriorstructure #seismicwaves #felsicrock #maficrock #porosity #insight #crust #water #mars