M4.9 Earthquake 63 km SSW of Merizo Village, Guam — January 22, 2021
2021-01-22 13:51:05 UTC (2021-01-22) · approx. 11:51 PM UTC+10 local
Felt by 3 people across nearby locations.
On January 22, 2021 at 13:51 UTC, a magnitude 4.9 shallow crustal earthquake struck 63 km SSW of Merizo Village, Guam, at a depth of 38.0 km and coordinates 12.7878°, 144.3497°.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 3 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
144.3497°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Merizo Village, Guam?
The magnitude 4.9 earthquake that struck 63 km SSW of Merizo Village, Guam on January 22, 2021 at 13:51 UTC had a depth of 38.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.7878°, 144.3497°, which is 63 km SSW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000d2da). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 22, 2021). M4.9 Earthquake 63 km SSW of Merizo Village, Guam — January 22, 2021. Retrieved April 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000d2da/