M4.7 Earthquake 146 km SSE of San Jose Village, Northern Mariana Islands — October 9, 2021
2021-10-09 21:28:45 UTC (2021-10-09) · approx. 7:28 AM UTC+10 local
On October 9, 2021 at 21:28 UTC, a magnitude 4.7 shallow crustal earthquake struck 146 km SSE of San Jose Village, Northern Mariana Islands, at a depth of 35.0 km and coordinates 13.7799°, 146.2241°.
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
146.2241°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near San Jose Village, Northern Mariana Islands?
The magnitude 4.7 earthquake that struck 146 km SSE of San Jose Village, Northern Mariana Islands on October 9, 2021 at 21:28 UTC had a depth of 35.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.7799°, 146.2241°, which is 146 km SSE of San Jose Village, Northern Mariana Islands.
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.
Actions
Authoritative source: USGS event page (event ID: us6000fuk2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 9, 2021). M4.7 Earthquake 146 km SSE of San Jose Village, Northern Mariana Islands — October 9, 2021. Retrieved December 18, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000fuk2/