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United States · California

M3.9 Earthquake near Lake County, California (United States)

UTC time: 2026-10-28 12:01:11 UTC Local time: —

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About this earthquake

On October 28, 2026 at 12:01 UTC, a magnitude M3.9 earthquake occurred near Lake County, California (United States). The hypocenter lay relatively close to the surface at around 11 km, increasing how strongly it was felt. Earthquakes of this magnitude are often felt but rarely cause damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 173 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

ID
58a47253f4650f46e57f8fa2110a90a030146e02
Magnitude
M3.9
Depth
10.6 km
UTC time
2026-10-28 12:01:11 UTC
Local time
—
Country
United States
State
California
City
Lake County
County
Lake County
Source
usgs
Coordinates
39.50050, -122.95184
Temperature
5.9°C

Depth profile

Depth profile Depth: 10.6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10.6 km
Shallow
10.6 km
10.6 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

Official USGS aftershock forecast

Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.

Issued: Oct 28, 2026, 12:31 PM UTC · Last checked: Oct 28, 2026, 12:52 PM UTC

Oct 28, 2026, 12:40 PM UTC – Oct 29, 2026, 12:40 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.011.13 %0–1
M ≥ 4.01.30 %0–0
M ≥ 5.00.13 %0–0
M ≥ 6.00.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 28, 2026, 12:40 PM UTC – Nov 4, 2026, 12:40 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.016.79 %0–2
M ≥ 4.02.11 %0–0
M ≥ 5.00.22 %0–0
M ≥ 6.00.02 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 28, 2026, 12:40 PM UTC – Nov 27, 2026, 12:40 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.020.79 %0–2
M ≥ 4.02.75 %0–1
M ≥ 5.00.29 %0–0
M ≥ 6.00.03 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 28, 2026, 12:40 PM UTC – Oct 28, 2027, 12:40 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.027.20 %0–3
M ≥ 4.03.92 %0–1
M ≥ 5.00.41 %0–0
M ≥ 6.00.04 %0–0
M ≥ 7.0< 0.01 %0–0

The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.

Source: USGS — Operational Aftershock Forecast

Volcanoes nearby

  • Clear Lake Volcanic Field
    Distance: 61 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 165 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 222 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 263 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Soda Lakes
    Distance: 349 km ·Maar(s) ·Elevation: 1'251 m ·United States
  • Mono Lake Volcanic Field
    Distance: 379 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States

California

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 239 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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