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United States · California

M1.0 Earthquake near Castle Rock Springs, California (United States)

UTC time: 2026-10-17 17:21:21 UTC Local time: —
Magnitude
M1.0
Depth
0.1 km
Source
USGS

California · Castle Rock Springs

Country overview

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About this earthquake

A magnitude M1.0 earthquake was recorded near Castle Rock Springs, California (United States) on October 17, 2026 at 17:21 UTC. The hypocenter lay relatively close to the surface at around 0 km, increasing how strongly it was felt. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 145 earthquakes were recorded in the past 24 hours, the strongest reaching M3.8.

Details

ID
9475edd327845c7dd31e27bc598ffce178301af2
Magnitude
M1.0
Depth
0.1 km
UTC time
2026-10-17 17:21:21 UTC
Local time
—
Country
United States
State
California
City
Castle Rock Springs
County
Lake County
Source
usgs
Coordinates
38.75867, -122.70700
Temperature
21.9°C

Depth profile

Depth profile Depth: 0.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 0.1 km
Shallow
0.1 km
0.1 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: 24 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 218 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 298 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Mono Lake Volcanic Field
    Distance: 331 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Medicine Lake
    Distance: 332 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Mono-Inyo Craters
    Distance: 338 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Charles M. Schulz Sonoma County AirportUnited States · STS · KSTS
    29.2 kmStraight-line distance

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

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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