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United States · California

M2.8 Earthquake near San Luis Obispo County, California (United States)

UTC time: 2026-08-04 19:55:25 UTC Local time: —
Magnitude
M2.8
Depth
6.9 km
Source
USGS

California · San Luis Obispo County

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About this earthquake

A magnitude M2.8 earthquake was recorded near San Luis Obispo County, California (United States) on August 4, 2026 at 19:55 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: over the past 24 hours, QuakeMap24 logged 179 earthquakes, the strongest at M3.0.

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: 287 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 302 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 319 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Ubehebe Craters
    Distance: 362 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Clear Lake Volcanic Field
    Distance: 393 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Soda Lakes
    Distance: 471 km ·Maar(s) ·Elevation: 1'251 m ·United States

California

Context for this earthquake

22 Sep 2025 – 22 Sep 2026 · M ≥ 2.0 · 2,417 Catalogue entries

Of 2,416 other entries for this area and period, 367 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

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