M5.1 Earthquake 246 km NE of Saipan, Northern Mariana Islands — September 28, 2022
2022-09-28 21:41:08 UTC (2022-09-28) · approx. 7:41 AM UTC+10 local
Felt by 1 person across nearby locations.
On September 28, 2022 at 21:41 UTC, a magnitude 5.1 shallow crustal earthquake struck 246 km NE of Saipan, Northern Mariana Islands, at a depth of 41.6 km and coordinates 16.9996°, 147.1351°. This earthquake was detected by 157 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — 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
147.1351°E
Technical Information
Common Questions
How strong was the magnitude 5.1 earthquake near Saipan, Northern Mariana Islands?
The magnitude 5.1 earthquake that struck 246 km NE of Saipan, Northern Mariana Islands on September 28, 2022 at 21:41 UTC had a depth of 41.6 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 16.9996°, 147.1351°, which is 246 km NE of Saipan, Northern Mariana Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000ip2z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 28, 2022). M5.1 Earthquake 246 km NE of Saipan, Northern Mariana Islands — September 28, 2022. Retrieved December 3, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000ip2z/