Keep up to date on geophysical events around the world and the latest news within the geophysics community and beyond.

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Announcements, news, and science highlights featuring the GAGE Facility and staff, as well as the broader geodetic community.

16 September 2021

New and upgraded geodetic stations will serve ShakeAlert

The ShakeAlert earthquake early warning system is much more than the alert message on your phone. Detecting earthquakes, characterizing them, and determining the appropriate warning area takes a tremendous amount of infrastructure. With the completion of a recent Cooperative Agreement with the USGS, UNAVCO has improved West Coast geodetic infrastructure so it can be fully integrated into ShakeAlert.

8 September 2021

Supporting the science response to the 2021 Haiti earthquake

On August 14, a devastating magnitude 7.2 earthquake hit Nippes, Haiti, causing thousands of deaths and widespread damage to homes, churches, schools, and other infrastructure. In the midst of this humanitarian crisis, geoscientists are working to understand exactly what happened on the fault (or faults) responsible—which is critical to understanding future risk.

14 August 2021

Alaska Field Blog: Network Repairs

This is one post in a series on the Alaska Amphibious Community Seismic Experiment blog following a field campaign in response to the magnitude 8.2 Chignik earthquake. (You can find the UNAVCO event response page for this earthquake here.) We are reprinting posts contributed by UNAVCO staff here but you can follow along on the blog to read the rest. This post comes from UNAVCO Project Manager Ken Austin.

Event Responses

8 September 2021

September 8, 2021 M 7.0 Acapulco, Mexico Earthquake

At 1:47:47 (UTC) on September 8, 2021, a magnitude 7.0 earthquake occurred near Acapulco, Mexico. The earthquake is associated with the plate boundary, where the oceanic Cocos plate collides with and subducts beneath Mexico. Slip occurred with a reverse motion and centered at a depth of 20 kilometers, producing a local tsunami warning but no warning for other regions in the Pacific.

14 August 2021

August 14, 2021 M 7.2 Haiti Earthquake

At 12:29:09 (UTC) on August 14, a shallow magnitude 7.2 earthquake occurred 12 kilometers northeast of Saint-Louis du Sud in Haiti, with oblique reverse motion on the fault.

29 July 2021

July 28, 2021 M 8.2 Alaska Earthquake

At 6:15:47 (UTC) on July 28, a magnitude 8.2 earthquake occurred southeast of Perryville and Chignik, off the coast of the Alaska Peninsula. The event occurred within the footprint of the Network of the Americas (NOTA), a network of continuous GPS/GNSS stations and borehole instruments operated by UNAVCO that monitors plate motion and transient deformation.