QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Wrightwood, CA

No earthquake was likely felt in Wrightwood in the 24 hours to 8:20 am PST (16:20 UTC). The last one was M 1.7, 5 km (3 mi) NW, at 6:36 pm PDT on 22 October 2026, estimated intensity II (weak) in town. Every earthquake near Wrightwood

This page: a magnitude 3.0 earthquake was recorded 6 km (4 mi) east-southeast of Wrightwood, CA, at 9:52 pm PDT on 30 October 2022 (04:52 UTC), 4.3 km deep. 76 people have reported feeling it to USGS.

USGS: 6km ESE of Wrightwood, CA

85 km (53 mi) ENE of Los Angeles, CA · 24 km (15 mi) N of Rancho Cucamonga, CA

9:52 pm PDT, Oct 30, 2022 · · 4.3 km deep · released about 990 lb of TNT

Every earthquake near Wrightwood Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 66 kmOrange County 77 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
9:52 pm PDT on 30 October 2022 ()
Where
6 km (4 mi) east-southeast of Wrightwood, CA · earthquakes near Wrightwood
Magnitude
M 3.0 (ml)
Depth
4.3 km below the surface
Felt
76 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 66 km WSW
Nearest mapped fault
San Andreas 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 1400 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 37 km (23 mi) from the epicentre. In Wrightwood, 6 km away, the estimate is intensity III (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: Wrightwood 6 km, intensity III · Phelan 9 km, intensity III · Rancho Cucamonga 26 km, intensity II · Hesperia 26 km, intensity II · Upland 28 km, intensity II · Muscoy 29 km, intensity II · Fontana 30 km, intensity II · Claremont 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 990 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 340,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 990 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 2018-08-29 — about 110 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 3 km SE of San Bernardino, California · 40 km SE of this epicentre
  2. 5.8 The 1991 Sierra Madre, California Earthquake · 40 km WSW of this epicentre
  3. 5.6 7km ENE of Running Springs, CA · 50 km ESE of this epicentre
  4. 5.5 The 1990 Upland, California Earthquake · 25 km SSW of this epicentre
  5. 5.4 5km S of Chino Hills, CA · 47 km SSW 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 34.3418, -117.5690. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 66 km (41 mi) WSW earthquakes near Los Angeles County
Orange County, CA 77 km (48 mi) SSW earthquakes near Orange County
Kern County, CA 154 km (96 mi) NW earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.5 7km SW of Pearblossom, CA
  2. 1.7 12km NE of Running Springs, CA
  3. 1.6 3km NNW of Fontana, CA
  4. 1.8 13km NE of Running Springs, CA
  5. 1.8 7km N of Yorba Linda, CA
  6. 1.6 4km NNW of Fontana, CA
  7. 1.5 14km N of Bradbury, CA
  8. 1.6 1km E of Loma Linda, CA
  9. 1.6 3km NNW of Fontana, CA
  10. 1.8 5km SW of Devore, CA
  11. 2.1 7km SW of Pearblossom, CA
  12. 2.8 2km SW of Redlands, CA
  13. 2.1 2km SW of Redlands, CA
  14. 1.6 7km S of Pearblossom, CA
  15. 1.6 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

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