Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Yucaipa, CA
No earthquake was likely felt in Yucaipa in the 24 hours to 1:05 pm PST (21:05 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 1.5 earthquake was recorded 13 km (8 mi) north-northeast of Yucaipa, CA, at 1:44 am PDT on 19 October 2020 (08:44 UTC), 7.2 km deep.
USGS: 13km NNE of Yucaipa, CA
13 km (8 mi) NNE of Yucaipa, CA · 131 km (82 mi) E of Los Angeles, CA
- When
- 1:44 am PDT on 19 October 2020 ()
- Where
- 13 km (8 mi) north-northeast of Yucaipa, CA · earthquakes near Yucaipa
- Magnitude
- M 1.5 (ml)
- Depth
- 7.2 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 89 km SW
- Nearest mapped fault
- San Andreas fault, 4 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 2215 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, 13 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: Running Springs, Big Bear Lake, Mentone, Calimesa, Cherry Valley, Big Bear City.
How big was it?
This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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 31,000 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 · 42 km S of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 17 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 25 km WSW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 39 km ESE of this epicentre
- 5.6 7km ENE of Running Springs, CA · 12 km NNW 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 34.1387, -116.9930. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 89 km (55 mi) | SW | earthquakes near Orange County |
| Riverside County, CA | 102 km (63 mi) | ESE | earthquakes near Riverside County |
| San Bernardino County, CA | 109 km (68 mi) | NE | earthquakes near San Bernardino County |
| Los Angeles County, CA | 117 km (73 mi) | W | earthquakes near Los Angeles County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.8 6km S of Mentone, CA
- 2.3 4km WNW of Devore, CA
- 2.2 4km WNW of Devore, CA
- 1.8 4km NNW of San Jacinto, CA
- 1.8 10km SW of Morongo Valley, CA
- 1.6 4km SE of Loma Linda, CA
- 2.3 4km SE of Loma Linda, CA
- 2.1 4km SE of Loma Linda, CA
- 1.5 2km E of Loma Linda, CA
- 2.3 6km S of Beaumont, CA
- 1.5 6km SSW of Redlands, CA
- 2.5 18km N of Banning, CA
- 1.6 5km SSW of Redlands, CA
- 1.8 1km ENE of Loma Linda, CA
- 1.6 17km NNW of Morongo Valley, 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.