M4.7 Earthquake in the Mariana Islands region — March 8, 2026
2026-03-08 19:08:04 UTC (2026-03-08) · approx. 5:08 AM UTC+10 local
On March 8, 2026 at 19:08 UTC, a magnitude 4.7 deep-focus earthquake struck in the Mariana Islands region, at a depth of 303.3 km and coordinates 21.6323°, 143.1048°. This earthquake was detected by 105 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.1048°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake in the Mariana Islands region?
The magnitude 4.7 earthquake that struck in the Mariana Islands region on March 8, 2026 at 19:08 UTC had a depth of 303.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 21.6323°, 143.1048°, which is in the Mariana Islands region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us7000s30z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 8, 2026). M4.7 Earthquake in the Mariana Islands region — March 8, 2026. Retrieved May 13, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000s30z/