Reported by EMSC today.
It is the 2nd strongest of the 9 detections recorded within 20 km of this point since 6 May 2026. The last comparable one was on 28 August 2026.
What the source measured
EMSC reported: OFFSHORE CHIAPAS, MEXICO
EMSC recorded magnitude 4.1 at a depth of -74 km.
The seismic region given by the source is OFFSHORE CHIAPAS, MEXICO.
An estimated 359 people live within 30 km of this point.
Nearby, since 6 May 2026
- July 31, 2026 · score 3 · 12.2 km
- August 28, 2026 · score 1 · 12.7 km
- August 28, 2026 · score 1 · 12.7 km
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 4 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 4 / 100 |
| Our confidence | 85% |
| Coordinates | 15.1230, -92.9260 |
| Nearest City | Mapastepec (34 km) |
| Population Exposed | 359 within 30 km |
| Impact Tier | minor |
| Timestamp | 2026-09-01T18:36:21.000Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260901_0000275 |
Score Breakdown
Technical Details
| Mag | 4.1 |
| Depth | -74.1 |
| MagType | m |
| Region | OFFSHORE CHIAPAS, MEXICO |
| Auth | UNM |
| SourceId | 2054214 |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a earthquake event with CalamityScore 4/100, in Offshore Chiapas, Mexico (Mexico), based on data from emsc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.