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M1.8 Depth: 22.0 km

M1.8 Earthquake near 2.3 km ( 1.4 mi) NNW (az= 344.1) from Diamond Bar, CA (United States)

UTC time: 2026-04-23 16:42:47 UTC Local time: —

About this earthquake

A magnitude M1.8 earthquake was recorded near 2.3 km ( 1.4 mi) NNW (az= 344.1) from Diamond Bar, CA (United States) on April 23, 2026 at 16:42 UTC. The hypocenter lay relatively close to the surface at around 22 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The data is provided by SCEDC and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 186 earthquakes, the strongest at M5.8.

Details

Magnitude
M1.8
Depth
22.0 km
UTC time
2026-04-23 16:42:47 UTC
Local time
—
Country
United States
City
California
Source
scedc
Coordinates
34.04817, -117.81700
Temperature
20.8°C

Map

Depth profile

Depth profile Depth: 22 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 22 km
Shallow
22 km
22 km — deeper than the regional average (15.8 km)
Regional average: 15.8 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: 225 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 332 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: 471 km ·Volcanic field ·Elevation: 1'183 m ·Mexico

Historic earthquake map · United States

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Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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