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M4.0 Depth: 136.7 km

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

UTC time: 2026-08-23 22:09:13 UTC Local time: —

About this earthquake

A magnitude M4.0 earthquake was recorded near Santa María Chimalapa, Oaxaca (Mexico) on August 23, 2026 at 22:09 UTC. At around 137 km, the focal depth places this among intermediate-depth events. Tremors of this size are distinctly felt and can occasionally cause light damage.

The data is provided by EMSC and cross-checked across seismological networks. Mexico: over the past 24 hours, QuakeMap24 logged 5 earthquakes, the strongest at M4.2.

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Depth profile

Depth profile Depth: 136.7 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 136.7 km
Intermediate
136.7 km
136.7 km — deeper than the regional average (44.9 km)
Regional average: 44.9 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: 114 km ·Lava dome(s) ·Elevation: 1'150 m ·Last eruption: 1982 ·Mexico
  • San Martin
    Distance: 204 km ·Volcanic field ·Elevation: 1'660 m ·Last eruption: 1796 ·Mexico
  • Tacana
    Distance: 305 km ·Stratovolcano ·Elevation: 4'064 m ·Last eruption: 1986 ·Mexico-Guatemala
  • Tajumulco
    Distance: 328 km ·Stratovolcano ·Elevation: 4'203 m ·Guatemala
  • Almolonga
    Distance: 377 km ·Stratovolcano ·Elevation: 3'173 m ·Last eruption: 1818 ·Guatemala
  • Santa Maria
    Distance: 378 km ·Stratovolcano ·Elevation: 3'745 m ·Last eruption: 2026 ·Guatemala

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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