M4.5 Earthquake 291 km NE of Saipan, Northern Mariana Islands — February 25, 2021
2021-02-25 17:05:38 UTC (2021-02-25) · approx. 3:05 AM UTC+10 local
On February 25, 2021 at 17:05 UTC, a magnitude 4.5 shallow crustal earthquake struck 291 km NE of Saipan, Northern Mariana Islands, at a depth of 10.0 km and coordinates 17.0585°, 147.7031°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
147.7031°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Saipan, Northern Mariana Islands?
The magnitude 4.5 earthquake that struck 291 km NE of Saipan, Northern Mariana Islands on February 25, 2021 at 17:05 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 17.0585°, 147.7031°, which is 291 km NE of Saipan, Northern Mariana Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000dewr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, February 25, 2021). M4.5 Earthquake 291 km NE of Saipan, Northern Mariana Islands — February 25, 2021. Retrieved May 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000dewr/