Earthquake · automatic estimate, may change
M 1.7ml
Earthquake near Calimesa, CA
No earthquake was likely felt in Calimesa in the 24 hours to 7:59 am PST (15:59 UTC). The last one was M 2.0, 7 km (4 mi) WSW, at 10:33 pm PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Calimesa
This page: a magnitude 1.7 earthquake was recorded 5 km (3 mi) south-southwest of Calimesa, CA, at 3:50 pm PDT on 31 May 2025 (22:50 UTC), 11 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 4 km SSW of Calimesa, CA
9 km (5 mi) SSW of Yucaipa, CA · 123 km (77 mi) E of Los Angeles, CA
- When
- 3:50 pm PDT on 31 May 2025 ()
- Where
- 5 km (3 mi) south-southwest of Calimesa, CA · earthquakes near Calimesa
- Magnitude
- M 1.7 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 72 km WSW
- Nearest mapped fault
- San Gorgonio Pass fault, 4 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 527 days ago
Earthquake alerts for Calimesa, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 7 km (4 mi) from the epicentre. In Calimesa, 5 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Yucaipa, Cherry Valley, Beaumont, Mentone, Lakeview, Moreno Valley.
How big was it?
This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 870,000× the energy of this one
- Around the size people start to feel M 3.0 78× the energy of this one
- This earthquake M 1.7 about 12 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.5 on 2018-05-08 — about 13,000 times the energy of this one.
Before 2016, the USGS record lists 23 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 24 km SSE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 36 km NE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 22 km NW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 42 km SW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 43 km E of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 33.9587, -117.0752. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 72 km (45 mi) | WSW | earthquakes near Orange County |
| Riverside County, CA | 102 km (64 mi) | ESE | earthquakes near Riverside County |
| San Diego County, CA | 108 km (67 mi) | SSE | earthquakes near San Diego County |
| Los Angeles County, CA | 112 km (70 mi) | WNW | earthquakes near Los Angeles County |
| San Bernardino County, CA | 129 km (80 mi) | NE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
43 earthquakes have been recorded within 50 km since this one.
- 2.4 6 km SW of Idyllwild, CA
- 1.7 12 km SSE of Lucerne Valley, CA
- 2.3 2 km SE of Loma Linda, CA
- 1.6 10 km NNW of Anza, CA
- 1.9 5 km WNW of Devore, CA
- 1.6 5 km S of Redlands, CA
- 1.6 5 km SSW of Redlands, CA
- 1.9 16 km SSE of Big Bear Lake, CA
- 1.6 3 km NE of Rancho Cucamonga, CA
- 1.7 5 km S of Calimesa, CA
- 1.6 15 km SSE of Big Bear Lake, CA
- 2.1 3 km E of Lake Arrowhead, CA
- 1.5 4 km SSE of Home Gardens, CA
- 2.1 8 km NNE of Big Bear City, CA
- 2.0 1 km SW of Loma Linda, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.