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United States · California

M1.5 Earthquake near San Mateo County, California (United States)

UTC time: 2026-10-31 18:20:50 UTC Local time: —

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About this earthquake

On October 31, 2026 at 18:20 UTC, a magnitude M1.5 earthquake occurred near San Mateo County, California (United States). With a focal depth of about 8 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 NCEDC. United States: over the past 24 hours, QuakeMap24 logged 189 earthquakes, the strongest at M3.3.

Details

ID
d4b7db09c4a4823ded850f2ea2dca1543c170c23
Magnitude
M1.5
Depth
7.8 km
UTC time
2026-10-31 18:20:50 UTC
Local time
—
Country
United States
State
California
City
San Mateo County
County
San Mateo County
Source
ncedc
Coordinates
37.58817, -122.44917
Temperature
16.2°C

Depth profile

Depth profile Depth: 7.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.8 km
Shallow
7.8 km
7.8 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

  • Clear Lake Volcanic Field
    Distance: 156 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mammoth Mountain
    Distance: 301 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: 304 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Lassen Volcanic Center
    Distance: 333 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 378 km ·Maar(s) ·Elevation: 1'251 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • San Francisco International AirportUnited States · SFO · KSFO
    7.4 kmStraight-line distance
  • San Carlos AirportUnited States · SQL · KSQL
    19.4 kmStraight-line distance
  • Oakland San Francisco Bay AirportUnited States · OAK · KOAK
    24.9 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-31

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

Open history map
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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