Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Anza, CA
No earthquake was likely felt in Anza in the 24 hours to 8:52 am PST (16:52 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 1.8 earthquake was recorded 17 km (11 mi) east-southeast of Anza, CA, at 4:56 am PDT on 30 September 2022 (11:56 UTC), 9.8 km deep. 1 person has reported feeling it to USGS.
USGS: 17km ESE of Anza, CA
95 km (59 mi) NE of San Diego, CA · 31 km (19 mi) SSW of Palm Desert, CA
- When
- 4:56 am PDT on 30 September 2022 ()
- Where
- 17 km (11 mi) east-southeast of Anza, CA · earthquakes near Anza
- Magnitude
- M 1.8 (ml)
- Depth
- 9.8 km below the surface
- Felt
- 1 report
- Nearest
- Riverside County, 54 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 1504 days ago
Earthquake alerts for Anza, CA
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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 10 km (6 mi) from the epicentre. In Anza, 17 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, Borrego Springs, Palm Desert, Rancho Mirage.
How big was it?
This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
- Magna, Utah 2020 M 5.7 620,000× the energy of this one
- Around the size people start to feel M 3.0 55× the energy of this one
- This earthquake M 1.8 about 17 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 110,000 times the energy of this one.
Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:
- 6.4 The 1954 San Jacinto Fault, California Earthquake · 45 km ESE of this epicentre
- 6.0 16km WSW of Oasis, CA · 26 km ESE of this epicentre
- 5.7 Eastern San Diego County, California · 49 km SE of this epicentre
- 5.5 8km NNE of Ocotillo Wells, CA · 49 km SE of this epicentre
- 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 33.4842, -116.5090. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Riverside County, CA | 54 km (34 mi) | ENE | earthquakes near Riverside County |
| San Diego County, CA | 57 km (35 mi) | SSW | earthquakes near San Diego County |
| Imperial County, CA | 118 km (73 mi) | ESE | earthquakes near Imperial County |
| Orange County, CA | 119 km (74 mi) | W | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
40 earthquakes have been recorded within 50 km since this one.
- 1.9 8km N of Lake Henshaw, CA
- 1.9 2km WSW of Lake Henshaw, CA
- 1.5 11km NE of Julian, CA
- 1.6 3km SSE of Lake Henshaw, CA
- 2.0 11km SSW of Idyllwild, CA
- 1.9 13km ENE of Borrego Springs, CA
- 1.5 9km N of Julian, CA
- 1.6 9km N of Julian, CA
- 1.6 9km N of Julian, CA
- 2.0 9km N of Julian, CA
- 1.6 5km NW of Palomar Observatory, CA
- 1.5 10km SSW of Idyllwild, CA
- 1.6 11km NNW of Anza, CA
- 2.0 11km NW of Anza, CA
- 2.0 3km SSE of Lake Henshaw, 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.