Earthquake near Borrego Springs, CA

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 42 km (26 mi) from the epicentre. In Borrego Springs, 10 km away, the estimate is intensity III (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: Borrego Springs 10 km, intensity III · La Quinta 36 km, intensity II · Anza 36 km, intensity II · Julian 37 km, intensity II · Mecca 37 km, intensity II · Salton City 39 km, intensity II · Coachella 41 km, intensity II · Palm Desert 42 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 210,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
4. This earthquake M 3.1 about 1,600 lb of TNT
5. Around the size people start to feel M 3.0 this one released 1.7× more

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 1,100 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

1. 6.6 The 1968 Borrego Mountain, California Earthquake · 31 km SE of this epicentre Apr 9, 1968
2. 6.4 The 1954 San Jacinto Fault, California Earthquake · 27 km E of this epicentre Mar 19, 1954
3. 6.0 16km WSW of Oasis, CA · 13 km ENE of this epicentre Mar 25, 1937
4. 5.7 Eastern San Diego County, California · 30 km ESE of this epicentre Sep 30, 1916
5. 5.5 8km NNE of Ocotillo Wells, CA · 30 km ESE of this epicentre Mar 19, 1954

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 33.3457, -116.3713. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.6 12km NE of Julian, CA 12:37 UTC
2. 2.4 5km SW of Salton City, CA 09:14 UTC
3. 3.2 5km SW of Salton City, CA 09:05 UTC
4. 1.9 24km SSW of Ocotillo Wells, CA 04:04 UTC
5. 1.6 18km SE of Ocotillo Wells, CA 18:31 UTC
6. 2.2 5km SW of Salton City, CA 15:51 UTC
7. 1.6 7km ENE of Aguanga, CA 10:53 UTC
8. 1.8 5km SW of Salton City, CA 05:14 UTC
9. 1.7 4km SW of Salton City, CA 00:39 UTC
10. 1.8 27km ENE of Pine Valley, CA 15:41 UTC
11. 1.8 16km ESE of Anza, CA 23:07 UTC
12. 1.6 2km SE of Lake Henshaw, CA 12:23 UTC
13. 2.0 2km SE of Lake Henshaw, CA 00:20 UTC
14. 1.7 8km ENE of Aguanga, CA 21:54 UTC
15. 2.0 10km NE of Borrego Springs, CA 09:59 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 05:03 UTC. 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.