M6.0 Earthquake 88 km SW of Acajutla, El Salvador — August 23, 2025
2025-08-23 09:14:22 UTC (2025-08-23) · approx. 3:14 AM UTC-6 local
Felt by 42 people across nearby locations. Maximum shaking intensity MMI 5.0 (strong).
On August 23, 2025 at 09:14 UTC, a magnitude 6.0 shallow crustal earthquake struck 88 km SW of Acajutla, El Salvador, at a depth of 17.0 km and coordinates 13.0601°, -90.4343°. The earthquake was reported felt by 42 peopleacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 5.0 (strong). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 76 seismic stations with good location accuracy and was assigned a USGS significance rating of 576, placing it among routine seismic activity. The nearest populated place is Puerto San Jose (population 18,655).
Physical scale: An earthquake of magnitude 6.0 releases seismic energy equivalent to roughly 15 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 8.3 km — a useful intuition for the size of the slip patch on the fault.
Nearest Populated Places
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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 42 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
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 | 13,735,696 |
| MMI 4 | light | 2,453,436 |
| MMI 5 | moderate | 19,134 |
Earthquake Details
-90.4343°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 6.0 earthquake near Acajutla, El Salvador?
The magnitude 6.0 earthquake that struck 88 km SW of Acajutla, El Salvador on August 23, 2025 at 09:14 UTC had a depth of 17.0 km. It was felt by 42 people with maximum shaking intensity of MMI 5.0 (strong). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at 13.0601°, -90.4343°, which is 88 km SW of Acajutla, El Salvador. The nearest populated place is Puerto San Jose (population 18,655).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.0 earthquakes can continue for weeks to months and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000r3at). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 23, 2025). M6.0 Earthquake 88 km SW of Acajutla, El Salvador — August 23, 2025. Retrieved November 12, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r3at/