4.5

M4.5 Earthquake 186 km SW of Merizo Village, Guam — April 9, 2026

2026-04-09 23:26:35 UTC (2026-04-09) · approx. 9:26 AM UTC+10 local

MagnitudeM4.5(mb)
Time23:26 UTC≈ 9:26 AM UTC+10
Depth10.0 kmshallow crustal
Coordinates11.877°, 143.692°
Felt byNo felt reports
Status✓ Reviewed by USGS

On April 9, 2026 at 23:26 UTC, a magnitude 4.5 shallow crustal earthquake struck 186 km SW of Merizo Village, Guam, at a depth of 10.0 km and coordinates 11.8770°, 143.6919°. This earthquake was detected by 23 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.

Map showing earthquake epicenter at 11.88°, 143.69°

Earthquake Details

Magnitude
4.5 mb
Depth
10.0 km
shallow crustal
Location
11.8770°N
143.6919°E

Technical Information

Event ID
us6000snu7
Event Type
earthquake
Status
✓ Reviewed
Significance
312
Stations Used
23
Azimuthal Gap
139.0°
Min Station Distance
2.053°
RMS Residual
0.54 sec
Last Updated
2026-04-27 05:18:50 UTC

Common Questions

How strong was the magnitude 4.5 earthquake near Merizo Village, Guam?

The magnitude 4.5 earthquake that struck 186 km SW of Merizo Village, Guam on April 9, 2026 at 23:26 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 11.8770°, 143.6919°, which is 186 km SW 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.

What should I do after an earthquake?

If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.

Actions

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Authoritative source: USGS event page (event ID: us6000snu7). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, April 9, 2026). M4.5 Earthquake 186 km SW of Merizo Village, Guam — April 9, 2026. Retrieved May 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000snu7/