QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Yucaipa, CA

No earthquake was likely felt in Yucaipa in the 24 hours to 6:52 am PST (14:52 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 1.7 earthquake was recorded 15 km (9 mi) east-northeast of Yucaipa, CA, at 10:45 pm PST on 5 February 2023 (06:45 UTC), 7.1 km deep.

USGS: 15km ENE of Yucaipa, CA

15 km (9 mi) ENE of Yucaipa, CA · 141 km (88 mi) E of Los Angeles, CA

10:45 pm PST, Feb 5, 2023 · · 7.1 km deep · released about 9.3 lb of TNT

Every earthquake near Yucaipa Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 89 kmOrange County 93 kmSan Bernardino County 109 kmSan Diego County 116 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
10:45 pm PST on 5 February 2023 ()
Where
15 km (9 mi) east-northeast of Yucaipa, CA · earthquakes near Yucaipa
Magnitude
M 1.7 (ml)
Depth
7.1 km below the surface
Felt
no reports yet
Nearest
Riverside County, 89 km ESE
Nearest mapped fault
San Andreas 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 1374 days ago

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 10 km (6 mi) from the epicentre. In Yucaipa, 15 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: Cherry Valley, Banning, Beaumont, Calimesa, Cabazon, Big Bear Lake.

How big was it?

This earthquake released about 9.3 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.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 18,000 times the energy of this one.

Before 2016, the USGS record lists 31 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.3 The 1992 Landers, California Earthquake · 44 km ENE of this epicentre
  2. 6.7 The 1918 San Jacinto, California Earthquake · 35 km SSW of this epicentre
  3. 6.3 The 1992 Big Bear, California Earthquake · 16 km NNE of this epicentre
  4. 6.2 3 km SE of San Bernardino, California · 35 km W of this epicentre
  5. 6.0 The 1986 North Palm Springs, California Earthquake · 26 km ESE 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 34.0662, -116.8830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Riverside County, CA 89 km (56 mi) ESE earthquakes near Riverside County
Orange County, CA 93 km (58 mi) WSW earthquakes near Orange County
San Bernardino County, CA 109 km (68 mi) NE earthquakes near San Bernardino County
San Diego County, CA 116 km (72 mi) S earthquakes near San Diego County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

55 earthquakes have been recorded within 50 km since this one.

  1. 1.5 4km E of Big Bear City, CA
  2. 1.7 8km SW of Calimesa, CA
  3. 1.6 8km S of Redlands, CA
  4. 1.7 6km SE of Beaumont, CA
  5. 1.6 9km NNE of Banning, CA
  6. 1.6 4km S of Banning, CA
  7. 1.7 5km SSW of Redlands, CA
  8. 1.6 2km E of Loma Linda, CA
  9. 1.6 1km W of Cabazon, CA
  10. 1.6 8km SE of Valle Vista, CA
  11. 1.7 9km SE of Valle Vista, CA
  12. 1.6 6km SE of Loma Linda, CA
  13. 1.8 9km N of Idyllwild, CA
  14. 2.0 5km NNE of Banning, CA
  15. 1.5 10km SSW of Joshua Tree, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.