M4.9 Earthquake 69 km SW of Merizo Village, Guam — July 21, 2026
2026-07-21 11:09:45 UTC (2026-07-21) · approx. 9:09 PM UTC+10 local
Felt by 4 people across nearby locations.
On July 21, 2026 at 11:09 UTC, a magnitude 4.9 shallow crustal earthquake struck 69 km SW of Merizo Village, Guam, at a depth of 12.9 km and coordinates 12.8161°, 144.2202°. This earthquake was detected by 60 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 371, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 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 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
144.2202°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Merizo Village, Guam?
The magnitude 4.9 earthquake that struck 69 km SW of Merizo Village, Guam on July 21, 2026 at 11:09 UTC had a depth of 12.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.8161°, 144.2202°, which is 69 km SW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000t25j). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 21, 2026). M4.9 Earthquake 69 km SW of Merizo Village, Guam — July 21, 2026. Retrieved August 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t25j/