M5.0 Earthquake near 1 km NNE of Brookdale, California

UTC time: 2026-04-02 08:41:25 UTC Local time: —

Archive record · original publication time was not recorded Content updated: 2026-09-06 13:00:22 UTC

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis. How our reports are produced ↗

Magnitude

M5.0

Depth: 9.0 km
Source: USGS

1 km NNE of Brookdale, California

Map

About this earthquake

On April 2, 2026 at 08:41 UTC, a magnitude M5.0 earthquake occurred near 1 km NNE of Brookdale, California. With a focal depth of about 9 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size can cause damage near the epicenter.

The event was recorded by USGS.

Details

256f64b3b7f1f31b67a255b7bbefc4ed8a14dbce

Magnitude

M5.0

Depth

9.0 km

UTC time

2026-04-02 08:41:25 UTC

Local time

—

Country

—

Source

usgs

Coordinates

37.11830, -122.10210

Temperature

12.8°C

Depth profile

Shallow

9 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: Sep 3, 2026, 8:41 AM UTC · Last checked: Sep 9, 2026, 7:22 PM UTC

Sep 3, 2026, 9:00 AM UTC – Sep 4, 2026, 9:00 AM UTC · Expired

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	0.03 %	0–0
M ≥ 4.0	< 0.01 %	0–0
M ≥ 5.0	< 0.01 %	0–0
M ≥ 6.0	< 0.01 %	0–0
M ≥ 7.0	< 0.01 %	0–0

Sep 3, 2026, 9:00 AM UTC – Sep 10, 2026, 9:00 AM UTC

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	0.18 %	0–0
M ≥ 4.0	0.02 %	0–0
M ≥ 5.0	< 0.01 %	0–0
M ≥ 6.0	< 0.01 %	0–0
M ≥ 7.0	< 0.01 %	0–0

Sep 3, 2026, 9:00 AM UTC – Oct 3, 2026, 9:00 AM UTC

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	0.73 %	0–0
M ≥ 4.0	0.07 %	0–0
M ≥ 5.0	< 0.01 %	0–0
M ≥ 6.0	< 0.01 %	0–0
M ≥ 7.0	< 0.01 %	0–0

Sep 3, 2026, 9:00 AM UTC – Sep 3, 2027, 9:00 AM UTC

Magnitude	Probability ≥ 1	Count (95% interval)
M ≥ 3.0	4.91 %	0–1
M ≥ 4.0	0.51 %	0–0
M ≥ 5.0	0.05 %	0–0
M ≥ 6.0	< 0.01 %	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

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation

Los Gatos16.5 kmNE30'705

Sunnyvale28.5 kmN155'805

San Jose30.7 kmNE997'368

GeoNames · CC BY 4.0

Volcanoes nearby

Clear Lake Volcanic Field

Distance: 214 km ·Volcanic field ·Elevation: 1'439 m ·United States
Mammoth Mountain

Distance: 277 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
Mono-Inyo Craters

Distance: 282 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
Mono Lake Volcanic Field

Distance: 288 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
Lassen Volcanic Center

Distance: 379 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
Soda Lakes

Distance: 388 km ·Maar(s) ·Elevation: 1'251 m ·United States

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

Mineta San Jose International AirportUnited States · SJC · KSJC
31.2 kmStraight-line distance
San Carlos AirportUnited States · SQL · KSQL
45.8 kmStraight-line distance
San Francisco International AirportUnited States · SFO · KSFO
60.8 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-09

Nuclear power plants

Vallecitos nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
59.6 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours7

First 24 hours15

First 72 hours28

Strongest subsequent eventM4.9

M4.62026-04-02 08:41:26 UTC2.8 kmNORTHERN CALIFORNIA M4.72026-04-02 08:41:26 UTC10.6 kmCentral California M4.92026-04-02 08:41:26 UTC0.6 kmCentral California M4.22026-04-02 08:41:33 UTC81.6 km9.5 km ( 5.9 mi) E (az= 82.7) from Ridgemark, CA M1.82026-04-02 12:37:22 UTC81.0 km12 km N of Livermore, CA M2.52026-04-02 13:13:45 UTC110.2 kmSAN FRANCISCO BAY AREA, CALIF. M1.82026-04-02 13:31:53 UTC42.9 km10 km E of Alum Rock, CA M1.42026-04-02 16:15:56 UTC2.6 km1 km SW of Boulder Creek, CA M2.22026-04-02 18:24:48 UTC131.3 kmCENTRAL CALIFORNIA M1.82026-04-02 18:24:49 UTC128.7 km22.9 km ( 14.2 mi) ENE (az= 75.2) from Greenfield, CA M1.72026-04-03 02:18:54 UTC143.1 km11 km N of New Idria, CA M1.02026-04-03 03:26:36 UTC71.9 km24 km NNE of Hollister, CA

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#1

Earlier events M≥414

Earlier events M≥50

Compared since2025-09-22

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M4.62025-09-22 09:56:12 UTC83.2 kmOakland M4.32025-11-27 20:57:37 UTC62.1 kmMonterey County M4.32025-09-22 09:56:13 UTC84.2 km2 km ESE of Berkeley, CA M4.22026-02-02 15:01:13 UTC72.8 kmSan Ramon M4.22025-12-14 23:30:44 UTC147.1 kmSonoma County

Stats (last 24h)

Global (24h)

616

Country (24h)

—

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