M4.6 Earthquake 20 km NW of Piti Village, Guam — January 4, 2021
2021-01-04 15:54:59 UTC (2021-01-04) · approx. 1:54 AM UTC+10 local
On January 4, 2021 at 15:54 UTC, a magnitude 4.6 intermediate depth earthquake struck 20 km NW of Piti Village, Guam, at a depth of 120.0 km and coordinates 13.5768°, 144.5430°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.5430°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Piti Village, Guam?
The magnitude 4.6 earthquake that struck 20 km NW of Piti Village, Guam on January 4, 2021 at 15:54 UTC had a depth of 120.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.5768°, 144.5430°, which is 20 km NW of Piti Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000d89n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 4, 2021). M4.6 Earthquake 20 km NW of Piti Village, Guam — January 4, 2021. Retrieved March 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d89n/