M5.4 Earthquake in the Revilla Gigedo Islands region — May 28, 2025
2025-05-28 09:01:39 UTC (2025-05-28) · approx. 2:01 AM UTC-7 local
On May 28, 2025 at 09:01 UTC, a magnitude 5.4 shallow crustal earthquake struck in the Revilla Gigedo Islands region, at a depth of 10.0 km and coordinates 19.7156°, -109.3426°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 143 seismic stations with good 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
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 372 |
Earthquake Details
-109.3426°E
Technical Information
Common Questions
How strong was the magnitude 5.4 earthquake in the Revilla Gigedo Islands region?
The magnitude 5.4 earthquake that struck in the Revilla Gigedo Islands region on May 28, 2025 at 09:01 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 19.7156°, -109.3426°, which is in the Revilla Gigedo Islands region.
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: us6000qgdb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, May 28, 2025). M5.4 Earthquake in the Revilla Gigedo Islands region — May 28, 2025. Retrieved August 16, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qgdb/