M4.7 Earthquake in the Guam region — January 27, 2023
2023-01-27 22:11:30 UTC (2023-01-27) · approx. 8:11 AM UTC+10 local
On January 27, 2023 at 22:11 UTC, a magnitude 4.7 shallow crustal earthquake struck in the Guam region, at a depth of 10.0 km and coordinates 12.2823°, 144.0576°. This earthquake was detected by 35 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
144.0576°E
Technical Information
Common Questions
How strong was the magnitude 4.7 earthquake in the Guam region?
The magnitude 4.7 earthquake that struck in the Guam region on January 27, 2023 at 22:11 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.2823°, 144.0576°, which is in the Guam 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.
Actions
Authoritative source: USGS event page (event ID: us6000jm1f). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 27, 2023). M4.7 Earthquake in the Guam region — January 27, 2023. Retrieved April 11, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jm1f/