M4.5 Earthquake 253 km S of Merizo Village, Guam — October 1, 2023
2023-10-01 23:50:21 UTC (2023-10-01) · approx. 9:50 AM UTC+10 local
On October 1, 2023 at 23:50 UTC, a magnitude 4.5 shallow crustal earthquake struck 253 km S of Merizo Village, Guam, at a depth of 10.0 km and coordinates 10.9729°, 144.5957°. This earthquake was detected by 30 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.5957°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Merizo Village, Guam?
The magnitude 4.5 earthquake that struck 253 km S of Merizo Village, Guam on October 1, 2023 at 23:50 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 10.9729°, 144.5957°, which is 253 km S of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000ld81). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 1, 2023). M4.5 Earthquake 253 km S of Merizo Village, Guam — October 1, 2023. Retrieved December 14, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000ld81/