Earthquake · reviewed by a seismologist
M 2.0ml
Earthquake near Calimesa, CA
No earthquake was likely felt in Calimesa in the 24 hours to 3:32 am PST (11:32 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 2.0 earthquake was recorded in Calimesa, CA, at 4:26 am PDT on 4 October 2017 (11:26 UTC), 15 km deep.
USGS: 1km NNE of Calimesa, CA
in Yucaipa, CA · 126 km (78 mi) E of Los Angeles, CA
- When
- 4:26 am PDT on 4 October 2017 ()
- Where
- in Calimesa, CA · earthquakes near Calimesa
- Magnitude
- M 2.0 (ml)
- Depth
- 15 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 76 km WSW
- Nearest mapped fault
- San Gorgonio Pass fault, under 1 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3304 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 4 km (2 mi) from the epicentre. 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.
Likely felt in: Yucaipa 4 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 27 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 560,000× the energy of this one
- Magna, Utah 2020 M 5.7 390,000× the energy of this one
- Around the size people start to feel M 3.0 35× the energy of this one
- This earthquake M 2.0 about 27 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 4.4 on 2016-01-06 — about 4,300 times the energy of this one.
Before 2016, the USGS record lists 22 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 27 km SSE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 30 km NE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 22 km WNW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 47 km SW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 41 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 33.9995, -117.0477. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 76 km (47 mi) | WSW | earthquakes near Orange County |
| Riverside County, CA | 101 km (63 mi) | ESE | earthquakes near Riverside County |
| San Diego County, CA | 111 km (69 mi) | SSE | earthquakes near San Diego County |
| Los Angeles County, CA | 114 km (71 mi) | WNW | earthquakes near Los Angeles County |
| San Bernardino County, CA | 124 km (77 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
57 earthquakes have been recorded within 50 km since this one.
- 1.9 4km SE of Home Gardens, CA
- 1.9 5km SE of Loma Linda, CA
- 1.8 5km S of Idyllwild, CA
- 1.8 8km E of Murrieta Hot Springs, CA
- 1.8 4km N of Beaumont, CA
- 2.2 4km NNW of Valle Vista, CA
- 1.9 5km NNW of Lake Elsinore, CA
- 1.7 10km SW of Idyllwild, CA
- 1.8 2km NE of Redlands, CA
- 1.7 13km NNE of Yucaipa, CA
- 1.6 3km SE of Loma Linda, CA
- 2.6 3km SE of Loma Linda, CA
- 1.6 3km ESE of Loma Linda, CA
- 2.7 5km E of Calimesa, CA
- 2.7 2km ESE 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.