M5.1 Earthquake 221 km W of Agat Village, Guam — September 8, 2021
2021-09-08 03:03:49 UTC (2021-09-08) · approx. 1:03 PM UTC+10 local
On September 8, 2021 at 03:03 UTC, a magnitude 5.1 shallow crustal earthquake struck 221 km W of Agat Village, Guam, at a depth of 10.0 km and coordinates 13.2713°, 142.6199°.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
142.6199°E
Technical Information
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Common Questions
How strong was the magnitude 5.1 earthquake near Agat Village, Guam?
The magnitude 5.1 earthquake that struck 221 km W of Agat Village, Guam on September 8, 2021 at 03:03 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 13.2713°, 142.6199°, which is 221 km W of Agat Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000fbfn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 8, 2021). M5.1 Earthquake 221 km W of Agat Village, Guam — September 8, 2021. Retrieved August 24, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000fbfn/