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M1.8 Earthquake near 16 km W of Johannesburg, CA (United States)

UTC time: 2025-04-23 21:39:18 UTC Local time: —

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About this earthquake

On April 23, 2025 at 21:39 UTC, a magnitude M1.8 earthquake occurred near 16 km W of Johannesburg, CA (United States). With a focal depth of about 8 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 150 earthquakes were recorded in the past 24 hours, the strongest reaching M4.0.

Details

ID
aad57e3adfff5a56470eeae31ed4de9707d5cbb9
Magnitude
M1.8
Depth
8.2 km
UTC time
2025-04-23 21:39:18 UTC
Local time
—
Country
United States
Source
usgs
Coordinates
35.34983, -117.80767
Temperature
28.8°C

Depth profile

Depth profile Depth: 8.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 8.2 km
Shallow
8.2 km
8.2 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

  • Ubehebe Craters
    Distance: 188 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Mammoth Mountain
    Distance: 276 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 294 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Salton Buttes
    Distance: 313 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Mono Lake Volcanic Field
    Distance: 314 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Uinkaret Field
    Distance: 437 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States

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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