M4.8 Earthquake 15 km S of Merizo Village, Guam — July 15, 2025
2025-07-15 22:18:03 UTC (2025-07-15) · approx. 8:18 AM UTC+10 local
Felt by 4 people across nearby locations. Aftershock of the M5.0 mainshock.
On July 15, 2025 at 22:18 UTC, a magnitude 4.8 shallow crustal earthquake struck 15 km S of Merizo Village, Guam, at a depth of 64.0 km and coordinates 13.1253°, 144.6479°. This earthquake was detected by 43 seismic stations with good location accuracy and was assigned a USGS significance rating of 355, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 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 5.0 mainshock that occurred 3 days ago 58 km SSW of Merizo Village, Guam. 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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 citizen responses 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
144.6479°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.8 earthquake near Merizo Village, Guam?
The magnitude 4.8 earthquake that struck 15 km S of Merizo Village, Guam on July 15, 2025 at 22:18 UTC had a depth of 64.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.1253°, 144.6479°, which is 15 km S of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.8 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 58 km SSW of Merizo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Authoritative source: USGS event page (event ID: us7000qcw3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 15, 2025). M4.8 Earthquake 15 km S of Merizo Village, Guam — July 15, 2025. Retrieved November 28, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qcw3/