Images

Map of free-field seismic stations across the United States (circa 2020) that are operated by national and regional seismic networks of the ANSS. The background shading indicates seismic hazard as defined in the USGS National Seismic Hazard Model. Regions with lighter highlighting have comparatively higher seismic hazard.

2018 Long-term National Seismic Hazard Map. Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site.  The map is based on the most recent USGS models for the conterminous U.S.

Nadine Reitman walks with a camera on a 20-foot pole to generate high resolution DEM’s of the Death Valley fault, May, 2021.

Liquefaction-related features and cracks along the sandy shore next to Stanley Lake.

The U.S. Geological Survey has released a report on the potential duration of aftershocks of the 2020 Southwest Puerto Rico earthquake sequence (series) to guide public policy decisions, other actions, and help people stay safe and care for themselves and each other.

El Servicio Geológico de los EE. UU. ha publicado un informe sobre la duración potencial de las réplicas de la secuencia (serie) del terremoto del Suroeste de Puerto Rico en el 2020 que puede ser usado como guía en las decisiones de política pública, otras acciones y ayudar a las personas a mantenerse seguras y cuidarse a sí mismas y a los demás.

Terremotos detectados entre diciembre 28, 2019 hasta enero 16, 2020. Sujeto a actualizaciones.

>300 M3+ terremotos* registrados

desde dic 28, 2019 (dentro de 40km) suficientemente fuerte como para ser sentido

10 M5+ terremotos* registrados

Earthquakes detected between December 28, 2019 as of January 16, 2020. Subject to updates.

>300 M3+earthquakes recorded*
since Dec. 28, 2019 (within 40km) strong enough to be felt

10 M5+ earthquakes recorded*
since Dec. 28, 2019 (including M6.4) large enough to do damage

USGS scientists collaborate with Sri Lankan scientists from the National Building Research Organization (NBRO) on the installation of rainfall and soil moisture instrumentation on an active landslide in southwest Sri Lanka. The station provides real-time data including rainfall and soil moisture content of an active landslide.

Thirty Bureau of Meteorology, Climatology and Geophysics (BMKG) senior staff members received USGS/IRIS training in Advanced Seismology and Tsunami Warnings (Oct. 14-18, 2019). Most of the staff members are in this photo.

Photo of students in October 2019 during lectures at Bureau of Meteorology, Climatology and Geophysics (BMKG) College (STMKG). 

Belle Philibosian field mapping the M7.1 Ridgecrest, California Earthquake Rupture, July 9, 2019.

Looking south along the creeping section of the San Andreas Fault near Bitterwater, California, September 23, 2019.

Jim Smith working on cabling inside of Lucchetti dam in Puerto Rico, assisting the Puerto Rico Strong Motion Program with Hurricane Maria recovery efforts. 

USGS technicial Scott Lydeen climbing the tower at the Strawberry Peak seismic station tower, part of the Southern California Seismic Network.

USGS technicial Scott Lydeen climbing the tower at the Strawberry Peak seismic station tower, part of the Southern California Seismic Network.

Geologists with USGS, the California Geological Survey (CGS) and Naval Air Weapons Station China Lake (NAWS) worked together in response to the Ridgecrest earthquake sequence in California that occurred July 4-6, 2019. The earthquakes were large enough that the fault rupture reached the earth’s surface.

USGS scientists Beth Haddon (left) and Jaime Delano (right) measuring an offset road at the site of the Ridgecrest earthquake sequence rupture. Photo credit: Chris DuRoss, USGS

USGS scientist Jessie Thompson Jobe collects and records information on earthquake surface ruptures observed along a roadway following the Ridgecrest earthquake sequence. Photo credit: Ryan Gold (USGS)

USGS Pasadena Earthquake Response Coordinator surveys displaced rocks near the southern end of the surface rupture of the 5 July 2019 M7.1 Ridgecrest earthquake.  USGS photograph. Photo credit: Sue Hough, USGS

Kate Scharer examining striations along fault scarp while completing GPS survey of fault rupture.  Here the fault has about 2.6 m of horizontal displacement and 0.5 m of vertical.  The rake of the striations is 47 degrees.  Photo credit: Jamie Delano, USGS