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Mexico · Oaxaca

M4.0 Earthquake near Santa María Chimalapa, Oaxaca (Mexico)

UTC time: 2026-10-31 09:21:35 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M4.0
Depth
109.1 km
Source
EMSC

Oaxaca · Santa María Chimalapa

Country overview

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About this earthquake

On October 31, 2026 at 09:21 UTC, a magnitude M4.0 earthquake occurred near Santa María Chimalapa, Oaxaca (Mexico). The earthquake originated at an intermediate depth of about 109 km. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by EMSC. Mexico: over the past 24 hours, QuakeMap24 logged 12 earthquakes, the strongest at M3.6.

Details

ID
ad3b69bf4677522472b1dc70b42ff4e51a59c494
Magnitude
M4.0
Depth
109.1 km
UTC time
2026-10-31 09:21:35 UTC
Local time
—
Country
Mexico
State
Oaxaca
City
Santa María Chimalapa
County
Santa María Chimalapa
Source
emsc
Coordinates
16.89400, -94.79800
Temperature
21.1°C

Depth profile

Depth profile Depth: 109.1 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 109.1 km
Intermediate
109.1 km
109.1 km — deeper than the regional average (44 km)
Regional average: 44 km
Why depth matters

Intermediate-depth quakes are felt across a wider area but usually cause less surface damage.

Depth classes per USGS

Volcanoes nearby

  • Chichon, El
    Distance: 175 km ·Lava dome(s) ·Elevation: 1'150 m ·Last eruption: 1982 ·Mexico
  • San Martin
    Distance: 190 km ·Volcanic field ·Elevation: 1'660 m ·Last eruption: 1796 ·Mexico
  • Tacana
    Distance: 348 km ·Stratovolcano ·Elevation: 4'064 m ·Last eruption: 1986 ·Mexico-Guatemala
  • Orizaba, Pico de
    Distance: 353 km ·Stratovolcano ·Elevation: 5'564 m ·Last eruption: 1846 ·Mexico
  • Tajumulco
    Distance: 372 km ·Stratovolcano ·Elevation: 4'203 m ·Guatemala
  • Naolinco Volcanic Field
    Distance: 378 km ·Volcanic field ·Elevation: 2'000 m ·Last eruption: 1145 ·Mexico

Oaxaca

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 214 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

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Historic earthquake map · Mexico

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Country statistics · Mexico

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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