Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Yucaipa, CA
No earthquake was likely felt in Yucaipa in the 24 hours to 6:00 am PST (14:00 UTC). The last one was M 1.5, 8 km (5 mi) ESE, at 3:54 pm PST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Yucaipa
This page: a magnitude 2.1 earthquake was recorded 2 km (2 mi) east-southeast of Yucaipa, CA, at 7:01 pm PST on 23 February 2023 (03:01 UTC), 16 km deep.
USGS: 2km ESE of Yucaipa, CA
in Yucaipa, CA · 128 km (80 mi) E of Los Angeles, CA
- When
- 7:01 pm PST on 23 February 2023 ()
- Where
- 2 km (2 mi) east-southeast of Yucaipa, CA · earthquakes near Yucaipa
- Magnitude
- M 2.1 (ml)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 80 km WSW
- Nearest mapped fault
- Crafton Hills fault, 2 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 1351 days ago
Earthquake alerts for Yucaipa, 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 Yucaipa, 2 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.
Likely felt in: Yucaipa 2 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
- Magna, Utah 2020 M 5.7 230,000× the energy of this one
- Around the size people start to feel M 3.0 20× the energy of this one
- This earthquake M 2.1 about 47 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 3,500 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 30 km S of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 26 km NE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 23 km WNW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 38 km E of this epicentre
- 5.6 7km ENE of Running Springs, CA · 24 km N 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 34.0260, -117.0183. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 80 km (50 mi) | WSW | earthquakes near Orange County |
| Riverside County, CA | 99 km (62 mi) | ESE | earthquakes near Riverside County |
| San Diego County, CA | 114 km (71 mi) | SSE | earthquakes near San Diego County |
| Los Angeles County, CA | 116 km (72 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 120 km (75 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
51 earthquakes have been recorded within 50 km since this one.
- 1.5 6km NNW of Cabazon, CA
- 1.5 2km NE of Loma Linda, CA
- 1.5 0km SSW of Calimesa, CA
- 1.6 6km SSE of Moreno Valley, CA
- 1.8 4km SW of Redlands, CA
- 1.6 7km N of Fontana, CA
- 2.1 1km WSW of Muscoy, CA
- 2.0 9km N of Banning, CA
- 1.6 1km SW of Muscoy, CA
- 1.8 2km WSW of Cabazon, CA
- 1.8 5km N of Moreno Valley, CA
- 1.6 4km ESE of Loma Linda, CA
- 1.5 4km E of Big Bear City, CA
- 1.7 8km SW of Calimesa, CA
- 1.6 8km S of Redlands, 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.