M4.6 Earthquake in the Mariana Islands region — March 30, 2021
2021-03-30 23:58:41 UTC (2021-03-30) · approx. 9:58 AM UTC+10 local
On March 30, 2021 at 23:58 UTC, a magnitude 4.6 shallow crustal earthquake struck in the Mariana Islands region, at a depth of 10.0 km and coordinates 21.3196°, 146.1159°.
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
146.1159°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake in the Mariana Islands region?
The magnitude 4.6 earthquake that struck in the Mariana Islands region on March 30, 2021 at 23:58 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 21.3196°, 146.1159°, which is in the Mariana Islands region.
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: us6000dzs5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, March 30, 2021). M4.6 Earthquake in the Mariana Islands region — March 30, 2021. Retrieved June 8, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dzs5/