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United States · California

M1.1 Earthquake near San Luis Obispo County, California (United States)

UTC time: 2026-09-27 08:07:16 UTC Local time: —
Magnitude
M1.1
Depth
6.9 km
Source
USGS

California · San Luis Obispo County

Country overview

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About this earthquake

A magnitude M1.1 earthquake was recorded near San Luis Obispo County, California (United States) on September 27, 2026 at 08:07 UTC. With a focal depth of about 7 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 151 earthquakes, the strongest at M4.8.

Depth profile

Depth profile Depth: 6.9 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 6.9 km
Shallow
6.9 km
6.9 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

  • Mammoth Mountain
    Distance: 286 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: 341 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: 482 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
    23.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-27

Nuclear power plants

  • Diablo Canyon nuclear power plantUnited StatesOperating at dataset dateReactor units at site: 2
    28.4 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

27 Sep 2025 – 27 Sep 2026 · M ≥ 2.0 · 2,428 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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