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 49 km (30 mi) from the epicentre. In Borrego Springs, 11 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 11 km, intensity III · Julian 21 km, intensity II · Pine Valley 40 km, intensity II · San Diego Country Estates 40 km, intensity II · Salton City 44 km, intensity II · Ramona 46 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 150,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
4. This earthquake M 3.3 about 1.1 tons of TNT
5. Around the size people start to feel M 3.0 this one released 2.4× 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 2025-04-14 — about 870 times the energy of this one.

Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:

1. 6.6 The 1968 Borrego Mountain, California Earthquake · 28 km E of this epicentre Apr 9, 1968
2. 6.4 The 1954 San Jacinto Fault, California Earthquake · 33 km ENE of this epicentre Mar 19, 1954
3. 6.0 16km WSW of Oasis, CA · 30 km NNE of this epicentre Mar 25, 1937
4. 5.7 Eastern San Diego County, California · 28 km E of this epicentre Sep 30, 1916
5. 5.5 8km NNE of Ocotillo Wells, CA · 28 km E 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 33.1617, -116.3980. Map © OpenStreetMap contributors.

Nearby places

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. 2.1 2 km SE of Lake Henshaw, CA 18:44 UTC
2. 1.8 11 km SW of Salton City, CA 09:10 UTC
3. 1.7 7 km SW of Lake Henshaw, CA 22:04 UTC
4. 1.8 23 km SW of Ocotillo Wells, CA 19:48 UTC
5. 2.4 5 km W of Borrego Springs, CA 17:49 UTC
6. 1.6 5 km WNW of Borrego Springs, CA 14:31 UTC
7. 1.6 5 km WNW of Borrego Springs, CA 04:46 UTC
8. 3.7 5 km W of Borrego Springs, CA 00:16 UTC
9. 2.6 2 km NW of Palomar Observatory, CA 05:03 UTC
10. 2.5 3 km S of Julian, CA 18:29 UTC
11. 1.7 10 km NNW of Julian, CA 16:52 UTC
12. 1.7 27 km WSW of Westmorland, CA 18:30 UTC
13. 1.5 10 km NNE of Ocotillo Wells, CA 13:33 UTC
14. 2.0 19 km SE of Anza, CA 12:07 UTC
15. 1.8 4 km NW of Lake Henshaw, CA 02:50 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 04:03 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.