M4.3 Earthquake 36 km NNW of Yigo Village, Guam — July 30, 2021
2021-07-30 22:36:43 UTC (2021-07-30) · approx. 8:36 AM UTC+10 local
On July 30, 2021 at 22:36 UTC, a magnitude 4.3 intermediate depth earthquake struck 36 km NNW of Yigo Village, Guam, at a depth of 169.8 km and coordinates 13.8408°, 144.7555°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.7555°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Yigo Village, Guam?
The magnitude 4.3 earthquake that struck 36 km NNW of Yigo Village, Guam on July 30, 2021 at 22:36 UTC had a depth of 169.8 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000f2qs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 30, 2021). M4.3 Earthquake 36 km NNW of Yigo Village, Guam — July 30, 2021. Retrieved October 14, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f2qs/