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United States · California

M2.2 Earthquake near San Luis Obispo County, California (United States)

UTC time: 2026-10-21 13:08:38 UTC Local time: —
Magnitude
M2.2
Depth
6.6 km
Source
USGS

California · San Luis Obispo County

Country overview

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About this earthquake

A magnitude M2.2 earthquake was recorded near San Luis Obispo County, California (United States) on October 21, 2026 at 13:08 UTC. The hypocenter lay relatively close to the surface at around 7 km, increasing how strongly it was felt. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The event was recorded by USGS. United States: 127 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Depth profile

Depth profile Depth: 6.6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 6.6 km
Shallow
6.6 km
6.6 km — shallower than the regional average (15.3 km)
Regional average: 15.3 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

  • Mammoth Mountain
    Distance: 287 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 303 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 322 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Ubehebe Craters
    Distance: 342 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Clear Lake Volcanic Field
    Distance: 433 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Soda Lakes
    Distance: 483 km ·Maar(s) ·Elevation: 1'251 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • San Luis County Regional AirportUnited States · SBP · KSBP
    23.5 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-05

Nuclear power plants

  • Diablo Canyon nuclear power plantUnited StatesOperating at dataset dateReactor units at site: 2
    27.8 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

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0 · 2,447 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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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

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

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