M4.6 Earthquake south of the Mariana Islands — August 31, 2022
2022-08-31 17:14:47 UTC (2022-08-31) · approx. 2:14 AM UTC+9 local
Felt by 1 person across nearby locations.
On August 31, 2022 at 17:14 UTC, a magnitude 4.6 shallow crustal earthquake struck south of the Mariana Islands, at a depth of 35.0 km and coordinates 11.8809°, 142.2450°. This earthquake was detected by 58 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
142.2450°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake south of the Mariana Islands?
The magnitude 4.6 earthquake that struck south of the Mariana Islands on August 31, 2022 at 17:14 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 11.8809°, 142.2450°, which is south of the Mariana Islands.
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: us7000i42s). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 31, 2022). M4.6 Earthquake south of the Mariana Islands — August 31, 2022. Retrieved November 6, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i42s/