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 8 km (5 mi) north-northwest of Anza, CA, at 1:27 am PDT on 9 October 2026 (08:27 UTC), 14 km deep. 2 people have reported feeling it to USGS.
USGS: 8 km NNW of Anza, CA
98 km (61 mi) NNE of San Diego, CA · 31 km (19 mi) ESE of Hemet, CA
- When
- 1:27 am PDT on 9 October 2026 ()
- Where
- 8 km (5 mi) north-northwest of Anza, CA · earthquakes near Anza
- Magnitude
- M 2.1 (ml)
- Depth
- 14 km below the surface
- Felt
- 2 reports
- Nearest
- Riverside County, 65 km E
- Nearest mapped fault
- San Jacinto 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 34 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 9 km (6 mi) from the epicentre. In Anza, 8 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 8 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 41 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.
- Mineral, Virginia 2011 M 5.8 370,000× the energy of this one
- Magna, Utah 2020 M 5.7 260,000× the energy of this one
- Around the size people start to feel M 3.0 23× the energy of this one
- This earthquake M 2.1 about 41 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 45,000 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 30 km WNW of this epicentre
- 6.0 16km WSW of Oasis, CA · 48 km ESE of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 43 km N of this epicentre
- 5.4 20km NNW of Borrego Springs, CA · 31 km SE of this epicentre
- 5.3 4km NNE of Desert Hot Springs, CA · 46 km NNE 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 33.6208, -116.6963. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Riverside County, CA | 65 km (41 mi) | E | earthquakes near Riverside County |
| San Diego County, CA | 67 km (42 mi) | S | earthquakes near San Diego County |
| Orange County, CA | 100 km (62 mi) | W | earthquakes near Orange 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.
- 0.9 21 km ESE of Anza, CA
- 0.2 4 km WSW of Anza, CA
- 0.8 8 km WNW of Anza, CA
- 0.5 6 km SSW of Idyllwild, CA
- 1.2 9 km N of Borrego Springs, CA
- 0.8 4 km NNW of Valle Vista, CA
- 0.7 6 km SSW of Palomar Observatory, CA
- 0.5 9 km WNW of Anza, CA
- 0.4 3 km WSW of Anza, CA
- 2.7 4 km E of San Jacinto, CA
- 0.8 9 km WNW of Anza, CA
- 0.3 12 km W of Anza, CA
- 1.2 10 km SE of Winchester, CA
- 0.7 17 km N of Borrego Springs, CA
- 0.4 11 km S of Idyllwild, 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| review status | automatic | reviewed | |
| longitude | -116.7 | -116.7 | |
| latitude | 33.62 | 33.62 | |
| depth | 14.04 | 14.27 | |
| magnitude | 2.07 | 2.09 | |
| felt reports | 1 | 2 | |
| reported intensity | not reported | 0 | |
| felt reports | not reported | 1 | |
| location | 6 km NNW of Anza, CA | 8 km NNW of Anza, CA | |
| longitude | -116.69 | -116.7 | |
| latitude | 33.61 | 33.62 | |
| depth | 8.14 | 14.04 |
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.