QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Anza, CA

No earthquake was likely felt in Anza in the 24 hours to 6:44 am PST (14:44 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 2.1 earthquake was recorded 18 km (11 mi) east-southeast of Anza, CA, at 11:56 pm PDT on 10 April 2025 (06:56 UTC), 14 km deep.

USGS: 18 km ESE of Anza, CA

96 km (59 mi) NE of San Diego, CA · 30 km (19 mi) SSW of Palm Desert, CA

11:56 pm PDT, Apr 10, 2025 · · 14 km deep · released about 51 lb of TNT

Every earthquake near Anza Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 53 kmSan Diego County 58 kmImperial County 118 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
11:56 pm PDT on 10 April 2025 ()
Where
18 km (11 mi) east-southeast of Anza, CA · earthquakes near Anza
Magnitude
M 2.1 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Riverside County, 53 km ENE
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 580 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 12 km (7 mi) from the epicentre. In Anza, 18 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: La Quinta, Palm Desert, Borrego Springs, Rancho Mirage, Indian Wells.

How big was it?

This earthquake released about 51 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.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 36,000 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1954 San Jacinto Fault, California Earthquake · 44 km ESE of this epicentre
  2. 6.0 16km WSW of Oasis, CA · 25 km ESE of this epicentre
  3. 5.7 Eastern San Diego County, California · 49 km SE of this epicentre
  4. 5.5 8km NNE of Ocotillo Wells, CA · 49 km SE of this epicentre
  5. 5.5 1km ENE of Borrego Springs, CA · 29 km SSE 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 33.4907, -116.4990. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Riverside County, CA 53 km (33 mi) ENE earthquakes near Riverside County
San Diego County, CA 58 km (36 mi) SSW earthquakes near San Diego County
Imperial County, CA 118 km (73 mi) ESE earthquakes near Imperial County
Orange County, CA 120 km (75 mi) W earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.7 13 km E of Julian, CA
  2. 1.5 6 km WSW of Anza, CA
  3. 1.6 21 km ESE of Anza, CA
  4. 2.2 21 km ESE of Anza, CA
  5. 1.8 8 km SE of Valle Vista, CA
  6. 1.6 7 km WSW of Anza, CA
  7. 2.0 6 km SSW of Idyllwild, CA
  8. 1.9 7 km WSW of Anza, CA
  9. 2.2 3 km SSW of Julian, CA
  10. 1.6 3 km WSW of Julian, CA
  11. 1.6 9 km NNW of Anza, CA
  12. 2.1 2 km SSW of Julian, CA
  13. 1.7 8 km NE of Borrego Springs, CA
  14. 2.2 3 km S of Julian, CA
  15. 2.5 2 km SW of Julian, 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.