M5.4 Earthquake 197 km WSW of Merizo Village, Guam — October 27, 2026
2026-10-27 23:14:16 UTC (55 min ago) · approx. 9:14 AM UTC+10 local
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On October 27, 2026 at 23:14 UTC, a magnitude 5.4 intermediate depth earthquake struck 197 km WSW of Merizo Village, Guam, at a depth of 91.6 km and coordinates 12.6981°, 142.9431°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 67 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 449, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.4 releases seismic energy equivalent to roughly 2 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 3.2 km — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Earthquake Details
142.9431°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.4 earthquake near Merizo Village, Guam?
The magnitude 5.4 earthquake that struck 197 km WSW of Merizo Village, Guam on October 27, 2026 at 23:14 UTC had a depth of 91.6 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 12.6981°, 142.9431°, which is 197 km WSW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.4 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000ttke). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 27, 2026). M5.4 Earthquake 197 km WSW of Merizo Village, Guam — October 27, 2026. Retrieved October 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000ttke/