4.7

M4.7 Earthquake 205 km N of Fais, Micronesia — September 26, 2025

2025-09-26 14:48:14 UTC (2025-09-26) · approx. 11:48 PM UTC+9 local

Aftershock of the M5.1 mainshock.

MagnitudeM4.7(mb)
Time14:48 UTC≈ 11:48 PM UTC+9
Depth47.9 kmshallow crustal
Coordinates11.616°, 140.734°
Felt byNo felt reports
Status✓ Reviewed by USGS

On September 26, 2025 at 14:48 UTC, a magnitude 4.7 shallow crustal earthquake struck 205 km N of Fais, Micronesia, at a depth of 47.9 km and coordinates 11.6158°, 140.7343°. This earthquake was detected by 44 seismic stations with excellent 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.

This earthquake is part of an ongoing aftershock sequence following the magnitude 5.1 mainshock that occurred 25 days ago 187 km N of Fais, Micronesia. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.

Map showing earthquake epicenter at 11.62°, 140.73°

Earthquake Details

Magnitude
4.7 mb
Depth
47.9 km
shallow crustal
Location
11.6158°N
140.7343°E

Technical Information

Event ID
us6000rd67
Event Type
earthquake
Status
✓ Reviewed
Significance
340
Stations Used
44
Azimuthal Gap
61.0°
Min Station Distance
4.487°
RMS Residual
0.63 sec
Last Updated
2025-12-11 21:40:45 UTC

Common Questions

How strong was the magnitude 4.7 earthquake near Fais, Micronesia?

The magnitude 4.7 earthquake that struck 205 km N of Fais, Micronesia on September 26, 2025 at 14:48 UTC had a depth of 47.9 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 11.6158°, 140.7343°, which is 205 km N of Fais, Micronesia.

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.

Is this the same earthquake as the M5.1 one earlier?

No. This magnitude 4.7 earthquake is an aftershock of the larger magnitude 5.1 mainshock that occurred earlier 187 km N of Fais, Micronesia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.

Actions

View on USGSDid You Feel It?

Authoritative source: USGS event page (event ID: us6000rd67). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, September 26, 2025). M4.7 Earthquake 205 km N of Fais, Micronesia — September 26, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rd67/