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United States · California

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

UTC time: 2026-10-20 17:02:30 UTC Local time: —
Magnitude
M1.0
Depth
1.4 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 20, 2026 at 17:02 UTC. The hypocenter lay relatively close to the surface at around 1 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 147 earthquakes, the strongest at M5.3.

Details

ID
500dd3df295521a386fce52f288f182ae4fcdead
Magnitude
M1.0
Depth
1.4 km
UTC time
2026-10-20 17:02:30 UTC
Local time
—
Country
United States
State
California
City
Castle Rock Springs
County
Lake County
Source
usgs
Coordinates
38.76933, -122.70167
Temperature
13.9°C

Depth profile

Depth profile Depth: 1.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 1.4 km
Shallow
1.4 km
1.4 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

  • Clear Lake Volcanic Field
    Distance: 23 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 217 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 297 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 331 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Mono Lake Volcanic Field
    Distance: 331 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·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
    30.5 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

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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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