Earthquake · reviewed by a seismologist
M 2.2ml
Earthquake near Westmorland, CA
No earthquake was likely felt in Westmorland in the 24 hours to 4:00 am PST (12:00 UTC). The last one was M 4.9, 79 km (49 mi) SSE, at 10:27 am PST on 3 November 2026, estimated intensity III (weak) in town; 321 felt reports to USGS. Every earthquake near Westmorland
This page: a magnitude 2.2 earthquake was recorded 22 km (13 mi) southwest of Westmorland, CA, at 5:55 pm PDT on 7 September 2017 (00:55 UTC), 9.5 km deep.
USGS: 22km SW of Westmorland, CA
- When
- 5:55 pm PDT on 7 September 2017 ()
- Where
- 22 km (13 mi) southwest of Westmorland, CA · earthquakes near Westmorland
- Magnitude
- M 2.2 (ml)
- Depth
- 9.5 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 44 km ENE
- Nearest mapped fault
- San Jacinto fault, 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 3304 days ago
Earthquake alerts for Westmorland, CA
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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 16 km (10 mi) from the epicentre. In Westmorland, 22 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: Seeley, Imperial, Brawley, El Centro.
How big was it?
This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
- Magna, Utah 2020 M 5.7 160,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 67 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 4.3 on 2016-09-27 — about 1,400 times the energy of this one.
Before 2016, the USGS record lists 42 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1940 Imperial Valley, California Earthquake · 41 km ESE of this epicentre
- 6.6 The 1942 Fish Creek Mountains, California Earthquake · 6 km NNE of this epicentre
- 6.6 The 1968 Borrego Mountain, California Earthquake · 39 km NW of this epicentre
- 6.6 The 1987 Superstition Hills, California Earthquake · 11 km NNW of this epicentre
- 6.4 The 1954 San Jacinto Fault, California Earthquake · 48 km NNW 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 32.9258, -115.8113. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 44 km (28 mi) | ENE | earthquakes near Imperial County |
| San Diego County, CA | 91 km (56 mi) | W | earthquakes near San Diego County |
| Riverside County, CA | 91 km (57 mi) | N | earthquakes near Riverside County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.0 11km ENE of Ocotillo Wells, CA
- 1.7 3km ENE of Westmorland, CA
- 1.8 4km S of Brawley, CA
- 3.1 3km SSW of Brawley, CA
- 2.4 4km S of Brawley, CA
- 2.5 3km SSW of Brawley, CA
- 2.4 12km NW of Progreso, B.C., MX
- 1.7 4km SSW of Brawley, CA
- 2.5 12km ENE of Ocotillo Wells, CA
- 1.5 17km S of Salton City, CA
- 2.4 12km ENE of Ocotillo Wells, CA
- 2.5 12km ENE of Ocotillo Wells, CA
- 1.5 12km WNW of Calipatria, CA
- 1.9 8km ENE of Ocotillo Wells, CA
- 2.7 9km ENE of Ocotillo Wells, 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.