M4.2 Earthquake 12 km WNW of Agat Village, Guam — August 12, 2020
2020-08-12 18:25:23 UTC (2020-08-12) · approx. 4:25 AM UTC+10 local
On August 12, 2020 at 18:25 UTC, a magnitude 4.2 intermediate depth earthquake struck 12 km WNW of Agat Village, Guam, at a depth of 125.1 km and coordinates 13.4291°, 144.5527°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.5527°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Agat Village, Guam?
The magnitude 4.2 earthquake that struck 12 km WNW of Agat Village, Guam on August 12, 2020 at 18:25 UTC had a depth of 125.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000bgkc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 12, 2020). M4.2 Earthquake 12 km WNW of Agat Village, Guam — August 12, 2020. Retrieved October 24, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000bgkc/