4.0
Earthquake Details: 57 km from Tonalá, Chiapas, Mexico
8/18/2026, 2:20:04 AM
A magnitude 4.0 earthquake occurred near 57 km from Tonalá, Chiapas, Mexico on 8/18/2026 at 2:20:04 AM. The seismic event was recorded at a depth of -87.9 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Regional Seismicity
Technical Details
Depth-87.9 km
Significance0
Latitude15.5810
Longitude-93.6950
Event IDemsc:20260818_0000082
Magnitude4.0
Updated:8/18/2026, 2:43:13 AM
External Resources
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Time & depth
- Local time
- 8/17/2026, 8:20:04 PM CST
- UTC
- 8/18/2026, 2:20:04 AM UTC
-87.9 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M4.3Offshore Chiapas, MexicoBeforeM4.292 km SW of Puerto Madero, MexicoBeforeM4.483 km SSW of Puerto San José, GuatemalaBeforeM4.2Offshore Chiapas, MexicoBeforeM5.267 km WSW of Puerto Madero, MexicoBeforeM4.4off the coast of Chiapas, MexicoBeforeM4.3off the coast of Chiapas, MexicoBeforeM4.2off the coast of Chiapas, MexicoBeforeM4.4off the coast of Chiapas, MexicoBeforeM4.3off the coast of Chiapas, MexicoBeforeM4.2off the coast of Chiapas, MexicoBeforeM4.2off the coast of Chiapas, MexicoBefore
Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 18, 2026, 02:43 AM UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.