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USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

Houses were damaged during the M6.4 earthquake that struck Puerto Rico on January 7, 2020. Houses were tagged by local officials for whether they were safe or not.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

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 were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. Here is an example of a lateral spread along a residential road in Ponce, Puerto Rico.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

Houses were damaged during the M6.4 earthquake that struck Puerto Rico on January 7, 2020. Houses were tagged by local officials for whether they were safe or not.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. Here is an example of a lateral spread near a stream in Ponce, Puerto Rico.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. The boardwalk in Ponce, Puerto Rico was damaged by the quake.

Meet the team of USGS scientists who were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. Here is an example of a landslide failure along a residential road in Ponce, Puerto Rico.

USGS scientists were deployed to assess land deformation and movement after a large M6.4 earthquake struck Puerto Rico on January 7, 2020. This landslide was discovered along a neighborhood road near Ponce, Puerto Rico.

USGS team with Wanda Vazquez-Garced, governor of Puerto Rico. From left to right: Lindsay Davis, Wanda Vazquez, Dianne Lopez-Trujillo, Jonathan Godt, Donyelle Davis, Alex Grant

USGS scientists Thomas L. Pratt and Alena L. Leads, along with Dr. Elizabeth Vanacore, associate research professor at University of Puerto Rico, analyze data in earthquake monitoring and recording equipment amid aftershocks across the island's southern coast.

Photo (L-R) Jose Cancel of Puerto Rico Seismic Network (PRSN), Alena Leeds of USGS and Javier Santiago of PRSN install a temporary seismometer at Sabana Yeguas in southwestern Puerto Rico on Jan. 10, 2020.

USGS scientists Nicholas van der Elst and Alan Yong installing a seismometer near the 2019 Ridgecrest earthquakes in southern California in order to record its aftershocks.

View to northeast from southwestern Arctic National Wildlife Refuge-1002 Area with ice in Camden Bay in distance. In foreground, red-weathering rocks are Hue Shale (oil-prone source rock with is present throughout 1002 Area) and dark gray rocks are Kemik Sandstone (lateral equivalent to Thomson sandstone, main reservoir in Pt. Thomson field).

Southward view of tundra surface and lakes on Canning River Delta near northwestern corner of Arctic National Wildlife Refuge-1002 Area.