Back to map
United States · California

M1.2 Earthquake near Calimesa, California (United States)

UTC time: 2026-09-20 13:15:11 UTC Local time: —

Map

About this earthquake

On September 20, 2026 at 13:15 UTC, a magnitude M1.2 earthquake occurred near Calimesa, California (United States). The hypocenter lay relatively close to the surface at around 18 km, increasing how strongly it was felt. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 187 earthquakes, the strongest at M5.3.

Details

ID
85631a03933bb4e9945592c1b444de2fd2d604f1
Magnitude
M1.2
Depth
18.2 km
UTC time
2026-09-20 13:15:11 UTC
Local time
—
Country
United States
State
California
City
Calimesa
County
Riverside County
Source
usgs
Coordinates
34.00350, -117.10934
Temperature
19.0°C

Depth profile

Depth profile Depth: 18.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 18.2 km
Shallow
18.2 km
18.2 km — close to 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: 165 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 337 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Pinacate
    Distance: 413 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mammoth Mountain
    Distance: 439 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Uinkaret Field
    Distance: 448 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States
  • Mono-Inyo Craters
    Distance: 457 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • San Bernardino International AirportUnited States · SBD · KSBD
    15.6 kmStraight-line distance
  • Ontario International AirportUnited States · ONT · KONT
    45.7 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-20

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

20 Sep 2025 – 20 Sep 2026 · M ≥ 2.0 · 2,417 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

Open history map
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.

Share