Snapshot of QFaults for the area including Yellowstone National Park from https://www.usgs.gov/programs/earthquake-hazards/faults
Multimedia
Browse images and videos related to earthquakes and earthquake hazards.
Images
Snapshot of QFaults for the area including Yellowstone National Park
Snapshot of QFaults for the area including Yellowstone National Park from https://www.usgs.gov/programs/earthquake-hazards/faults
Seismic hazard model for Hawaii from 2021 showing peak ground acceleration where warmer colors are higher levels.
linkSeismic hazard model for Hawaii from 2021 showing peak ground acceleration where warmer colors are higher levels (Petersen and others, 2022).
Seismic hazard model for Hawaii from 2021 showing peak ground acceleration where warmer colors are higher levels.
linkSeismic hazard model for Hawaii from 2021 showing peak ground acceleration where warmer colors are higher levels (Petersen and others, 2022).
Alaska cross section from the 2023 NSHM
A cross section through the area of Anchorage, AK showing earthquakes at depths along with subduction model linework from Slab2 and inputs from the 2007 NSHM. The image shows the seismic catalog (for the 2023 NSHM seismic hazard model for Alaska; Powers and others, 2024) for the crust (yellow), interface (orange), and intraslab (red).
A cross section through the area of Anchorage, AK showing earthquakes at depths along with subduction model linework from Slab2 and inputs from the 2007 NSHM. The image shows the seismic catalog (for the 2023 NSHM seismic hazard model for Alaska; Powers and others, 2024) for the crust (yellow), interface (orange), and intraslab (red).
AftershockForecastSequence-SpecificModelParameters.png
Aftershock Forecast Sequence-Specific Model Parameters equation
The probability distribution for the number of aftershocks, P(N), and the forecast can then be computed using the same procedures as for the generic model, using Pseq-spec(a) instead of Pgeneric(a).
Aftershock Forecast Sequence-Specific Model Parameters equation
The probability distribution for the number of aftershocks, P(N), and the forecast can then be computed using the same procedures as for the generic model, using Pseq-spec(a) instead of Pgeneric(a).
AftershockForecastfig6.gif
An example of Bayesian updating of productivity parameter (a-value) for the 2010 Mw 8.8 Maule, Chile, earthquake. Immediately following the earthquake, the SZ-GENERIC region-specific a-value distribution can be used.
An example of Bayesian updating of productivity parameter (a-value) for the 2010 Mw 8.8 Maule, Chile, earthquake. Immediately following the earthquake, the SZ-GENERIC region-specific a-value distribution can be used.
Mendocino_headerinfo-2.jpg
Screenshot of the Aftershock Forecast for an earthquake in California, showing the information box at the top of the forecast and the four tabs of forecast information.
Screenshot of the Aftershock Forecast for an earthquake in California, showing the information box at the top of the forecast and the four tabs of forecast information.
Videos
Shake Movie for M5.2 Julian earthquake
Computer simulation of shaking during the April 14, 2025 M5.2 Julian, CA earthquake. As the waves propagate away from the epicenter they interact with different geologic materials, which can slow down and amplify the shaking.
Computer simulation of shaking during the April 14, 2025 M5.2 Julian, CA earthquake. As the waves propagate away from the epicenter they interact with different geologic materials, which can slow down and amplify the shaking.
USGS PAGER during the Magnitude 7.7 2025 Mandalay, Burma (Myanmar) Earthquake
Dr. William Yeck is a seismologist with the USGS National Earthquake Information Center. He explains the importance of PAGER during the magnitude 7.7 2025 Mandalay, Burma (Myanmar) Earthquake.
Dr. William Yeck is a seismologist with the USGS National Earthquake Information Center. He explains the importance of PAGER during the magnitude 7.7 2025 Mandalay, Burma (Myanmar) Earthquake.
Ammonia or Ammonium? What’s the difference?
Ammonia or ammonium? What’s the difference? In water, ammonia (NH3) and ammonium (NH4+) exist together in an equilibrium that depends on pH and temperature. As the temperature or pH rise, ammonia (NH3) becomes more abundant. This is important because ammonia is more toxic than ammonium.
Ammonia or ammonium? What’s the difference? In water, ammonia (NH3) and ammonium (NH4+) exist together in an equilibrium that depends on pH and temperature. As the temperature or pH rise, ammonia (NH3) becomes more abundant. This is important because ammonia is more toxic than ammonium.
Explained: The December 5th, 2024 Earthquake (AD)
USGS Scientist, Bob deGroot, briefly explains what happened during the magnitude 7.0 earthquake that occurred offshore of Mendocino, CA, on December 5, 2024.
The event occurred in an area called the Triple Junction, where the Pacific, Juan de Fruca, and North American tectonic plates meet.
USGS Scientist, Bob deGroot, briefly explains what happened during the magnitude 7.0 earthquake that occurred offshore of Mendocino, CA, on December 5, 2024.
The event occurred in an area called the Triple Junction, where the Pacific, Juan de Fruca, and North American tectonic plates meet.
Explained: The December 5th, 2024 Earthquake
USGS Scientist, Bob deGroot, briefly explains what happened during the magnitude 7.0 earthquake that occurred offshore of Mendocino, CA, on December 5, 2024.
The event occurred in an area called the Triple Junction, where the Pacific, Juan de Fruca, and North American tectonic plates meet.
USGS Scientist, Bob deGroot, briefly explains what happened during the magnitude 7.0 earthquake that occurred offshore of Mendocino, CA, on December 5, 2024.
The event occurred in an area called the Triple Junction, where the Pacific, Juan de Fruca, and North American tectonic plates meet.
ShakeMovie Animation: 1989 M6.9 Loma Prieta Earthquake
The 1989 Loma Prieta earthquake, measuring magnitude 6.9, was the strongest to hit the San Francisco Bay Area since the Great San Francisco earthquake of 1906. Although it provided extensive data on ground shaking, the available observations don’t fully capture all the quake's important features.
The 1989 Loma Prieta earthquake, measuring magnitude 6.9, was the strongest to hit the San Francisco Bay Area since the Great San Francisco earthquake of 1906. Although it provided extensive data on ground shaking, the available observations don’t fully capture all the quake's important features.
Audio
Landers Rupture — Where they were
USGS scientists remember where they were during the 1992 Landers earthquake in Southern California
USGS scientists remember where they were during the 1992 Landers earthquake in Southern California
Landers Rupture — Sue on what it felt like
USGS seismologist Susan Hough recalls what the 1992 Landers earthquake felt like from Pasadena, CA.
USGS seismologist Susan Hough recalls what the 1992 Landers earthquake felt like from Pasadena, CA.
Landers Rupture — Jonathan Fieldwork
USGS geologist Jonathan Matti recalls fieldwork in the Mojave Desert soon after the 1992 Landers earthquake.
USGS geologist Jonathan Matti recalls fieldwork in the Mojave Desert soon after the 1992 Landers earthquake.
Landers Rupture — Andy on using satellite data
USGS seismologist Andrew Michael talks about the remote location of the 1992 Landers earthquake and how researchers were able to use satellite data to better see the quake’s impacts.
USGS seismologist Andrew Michael talks about the remote location of the 1992 Landers earthquake and how researchers were able to use satellite data to better see the quake’s impacts.
Landers Rupture — Sue on her role after the earthquake and seismic monitoring in Southern CA
USGS seismologist Susan Hough talks about her role following the 1992 Landers earthquake and seismic monitoring stations in Southern California.
USGS seismologist Susan Hough talks about her role following the 1992 Landers earthquake and seismic monitoring stations in Southern California.
Landers Rupture — Scott on what it looked like
USGS field technician Scott Lydeen recalls what the aftermath of the 1992 Landers earthquake looked like.
USGS field technician Scott Lydeen recalls what the aftermath of the 1992 Landers earthquake looked like.