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United States · California

M1.4 Earthquake near Walnut, California (United States)

UTC time: 2026-09-23 19:37:40 UTC Local time: —

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About this earthquake

A magnitude M1.4 earthquake was recorded near Walnut, California (United States) on September 23, 2026 at 19:37 UTC. The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The event was recorded by SCEDC. United States: over the past 24 hours, QuakeMap24 logged 189 earthquakes, the strongest at M3.5.

Details

ID
8e2417ebcceb0eee4951a0e8797d517f39c122f7
Magnitude
M1.4
Depth
10.3 km
UTC time
2026-09-23 19:37:40 UTC
Local time
—
Country
United States
State
California
City
Walnut
County
Los Angeles County
Source
scedc
Coordinates
34.03700, -117.87534
Temperature
29.4°C

Depth profile

Depth profile Depth: 10.3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10.3 km
Shallow
10.3 km
10.3 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

  • Salton Buttes
    Distance: 229 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 334 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Mammoth Mountain
    Distance: 413 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 432 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 453 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Pinacate
    Distance: 475 km ·Volcanic field ·Elevation: 1'183 m ·Mexico

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Ontario International AirportUnited States · ONT · KONT
    25.4 kmStraight-line distance
  • Long Beach International AirportUnited States · LGB · KLGB
    35.3 kmStraight-line distance
  • John Wayne Orange County International AirportUnited States · SNA · KSNA
    40.2 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-23

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

23 Sep 2025 – 23 Sep 2026 · M ≥ 2.0 · 2,414 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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