Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Anza, CA
No earthquake was likely felt in Anza in the 24 hours to 3:51 am PST (11:51 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 1.5 earthquake was recorded 12 km (7 mi) south-southeast of Anza, CA, at 2:14 am PDT on 23 September 2026 (09:14 UTC), 8.5 km deep.
USGS: 12 km SSE of Anza, CA
86 km (54 mi) NE of San Diego, CA · 39 km (24 mi) SW of Palm Desert, CA
- When
- 2:14 am PDT on 23 September 2026 ()
- Where
- 12 km (7 mi) south-southeast of Anza, CA · earthquakes near Anza
- Magnitude
- M 1.5 (ml)
- Depth
- 8.5 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 51 km SSW
- Nearest mapped fault
- San Jacinto fault, 7 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 50 days ago
Earthquake alerts for Anza, CA
Get a notification in this browser when USGS records an earthquake near Anza, CA. No account or email needed.
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 6 km (4 mi) from the epicentre. In Anza, 12 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: Aguanga.
How big was it?
This earthquake released about 5.9 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 2,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
- Around the size people start to feel M 3.0 160× the energy of this one
- This earthquake M 1.5 about 5.9 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 2025-04-14 — about 330,000 times the energy of this one.
Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 47 km NW of this epicentre
- 6.0 16km WSW of Oasis, CA · 35 km E of this epicentre
- 5.5 1km ENE of Borrego Springs, CA · 33 km SE of this epicentre
- 5.4 20km NNW of Borrego Springs, CA · 14 km ESE of this epicentre
- 5.3 6km SSE of Hemet, CA · 40 km NW 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 33.4590, -116.6165. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 51 km (31 mi) | SSW | earthquakes near San Diego County |
| Riverside County, CA | 64 km (40 mi) | ENE | earthquakes near Riverside County |
| Orange County, CA | 110 km (68 mi) | WNW | earthquakes near Orange County |
| Imperial County, CA | 126 km (78 mi) | ESE | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 0.3 9 km S of Idyllwild, CA
- 0.9 14 km N of Warner Springs, CA
- 0.6 8 km NNE of Julian, CA
- 0.5 7 km ENE of Anza, CA
- 0.4 17 km N of Borrego Springs, CA
- 1.1 4 km WSW of Anza, CA
- 0.5 9 km WNW of Anza, CA
- 0.3 10 km SSW of Idyllwild, CA
- 0.3 11 km SSW of Idyllwild, CA
- 0.6 9 km WNW of Anza, CA
- 0.6 6 km SSE of Idyllwild, CA
- 0.6 4 km WSW of Anza, CA
- 1.1 11 km SSW of Idyllwild, CA
- 0.4 9 km WNW of Anza, CA
- 1.1 9 km WNW 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
- 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.