3.9
Earthquake Details: 43 km from Ciudad Altamirano, Guerrero, Mexico
Oct 3, 2026, 21:13:58
A magnitude 3.9 earthquake occurred near 43 km from Ciudad Altamirano, Guerrero, Mexico on Oct 3, 2026 at 21:13:58. The seismic event was recorded at a depth of -78.1 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth-78.1 km
Significance0
Latitude18.3810
Longitude-101.0760
Event IDemsc:20261003_0000290
Magnitude3.9
Updated:Oct 4, 2026, 01:57:18 UTC
External Resources
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Time & depth
- Local time
- Oct 3, 2026, 15:13:58 CST
- UTC
- Oct 3, 2026, 21:13:58 UTC
-78.1 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M4.0Oaxaca, MéxicoBeforeM3.7Offshore Guerrero, MéxicoBeforeM3.6Offshore Jalisco, MéxicoBeforeM3.8Guerrero, MéxicoBeforeM4.835 km SSW of El Colomo, MéxicoBeforeM4.2Oaxaca, MéxicoBeforeM3.6Offshore Guerrero, MéxicoBeforeM3.7Guerrero, MéxicoBeforeM4.1Guerrero, MéxicoBeforeM3.6Offshore Oaxaca, MéxicoBeforeM3.7Michoacán, MéxicoBeforeM4.1Guerrero, MéxicoBefore
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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: Oct 4, 2026, 01:57 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.