QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Anza, CA

No earthquake was likely felt in Anza in the 24 hours to 8:14 am PST (16:14 UTC). The last one was M 2.6, 17 km (10 mi) S, at 10:44 pm PST on 5 November 2026, estimated intensity II (weak) in town; 7 felt reports to USGS. Every earthquake near Anza

This page: a magnitude 3.0 earthquake was recorded 16 km (10 mi) southeast of Anza, CA, at 4:59 am PDT on 22 March 2022 (11:59 UTC), 13 km deep. 23 people have reported feeling it to USGS.

USGS: 16km SE of Anza, CA

92 km (57 mi) NE of San Diego, CA · 33 km (21 mi) SSW of Palm Desert, CA

4:59 am PDT, Mar 22, 2022 · · 13 km deep · released about 1,100 lb of TNT

Every earthquake near Anza Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 55 kmRiverside County 57 kmOrange County 118 kmImperial County 119 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
4:59 am PDT on 22 March 2022 ()
Where
16 km (10 mi) southeast of Anza, CA · earthquakes near Anza
Magnitude
M 3.0 (ml)
Depth
13 km below the surface
Felt
23 reports · strongest reported intensity III
Nearest
San Diego County, 55 km SSW
Nearest mapped fault
San Jacinto 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 1629 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 36 km (22 mi) from the epicentre. In Anza, 16 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: Anza 16 km, intensity II · Borrego Springs 28 km, intensity II · La Quinta 30 km, intensity II · Aguanga 31 km, intensity II · Palm Desert 31 km, intensity II · Idyllwild 34 km, intensity II · Cathedral City 35 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,100 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 6.7 320,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 5.2 on 2016-06-10 — about 1,700 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1954 San Jacinto Fault, California Earthquake · 46 km ESE of this epicentre
  2. 6.0 16km WSW of Oasis, CA · 27 km ESE of this epicentre
  3. 5.5 8km NNE of Ocotillo Wells, CA · 50 km SE of this epicentre
  4. 5.5 1km ENE of Borrego Springs, CA · 28 km SE of this epicentre
  5. 5.4 20km NNW of Borrego Springs, CA · 8 km SE 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 33.4715, -116.5325. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 55 km (34 mi) SSW earthquakes near San Diego County
Riverside County, CA 57 km (35 mi) ENE earthquakes near Riverside County
Orange County, CA 118 km (73 mi) WNW earthquakes near Orange County
Imperial County, CA 119 km (74 mi) ESE earthquakes near Imperial County

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

Aftershocks so far

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

  1. 1.7 7km SE of Valle Vista, CA
  2. 2.1 13km WNW of Anza, CA
  3. 1.6 12km N of Borrego Springs, CA
  4. 2.2 10km NNE of Ocotillo Wells, CA
  5. 2.0 11km N of Borrego Springs, CA
  6. 1.6 15km ENE of Borrego Springs, CA
  7. 2.0 10km SW of Idyllwild, CA
  8. 2.4 15km ENE of Borrego Springs, CA
  9. 1.8 6km SW of Idyllwild, CA
  10. 1.7 9km N of Anza, CA
  11. 2.1 10km SSW of Idyllwild, CA
  12. 2.1 18km ESE of Anza, CA
  13. 1.8 3km NNW of Palomar Observatory, CA
  14. 2.0 10km S of Idyllwild, CA
  15. 1.9 16km ESE of Anza, 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.