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United States · California

M2.1 Earthquake near Costa Mesa, California (United States)

UTC time: 2026-09-29 10:17:58 UTC Local time: —

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About this earthquake

On September 29, 2026 at 10:17 UTC, a magnitude M2.1 earthquake occurred near Costa Mesa, California (United States). The hypocenter lay relatively close to the surface at around 8 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 160 earthquakes, the strongest at M4.1.

Details

ID
a0237f120252f5bd7695a97d69756c6e0215303f
Magnitude
M2.1
Depth
7.5 km
UTC time
2026-09-29 10:17:58 UTC
Local time
—
Country
United States
State
California
City
Costa Mesa
County
Orange County
Source
usgs
Coordinates
33.64217, -117.90483
Temperature
21.5°C

Depth profile

Depth profile Depth: 7.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.5 km
Shallow
7.5 km
7.5 km — shallower than the regional average (15.2 km)
Regional average: 15.2 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Salton Buttes
    Distance: 218 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 378 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Mammoth Mountain
    Distance: 455 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Pinacate
    Distance: 458 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mono-Inyo Craters
    Distance: 474 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 495 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • John Wayne Orange County International AirportUnited States · SNA · KSNA
    4.9 kmStraight-line distance
  • Long Beach International AirportUnited States · LGB · KLGB
    29.8 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-29

Nuclear power plants

  • San Onofre nuclear power plantUnited StatesPermanently shut downReactor units at site: 3
    44.5 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

California

Context for this earthquake

29 Sep 2025 – 29 Sep 2026 · M ≥ 2.0 · 2,435 Catalogue entries

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

Open seismic profile

Historic earthquake map · United States

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Country statistics · United States

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

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