Earthquake near Holtville, 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 39 km (24 mi) from the epicentre. In Holtville, 7 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: Holtville 7 km, intensity III · El Centro 10 km, intensity III · Imperial 12 km, intensity III · Calexico 14 km, intensity II · Brawley 21 km, intensity II · Calipatria 37 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 250,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
4. This earthquake M 3.1 about 1,300 lb of TNT
5. Around the size people start to feel M 3.0 this one released 1.4× 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 4.0 on 2016-07-31 — about 25 times the energy of this one.

Before 2016, the USGS record lists 42 earthquakes of M5 or more within 50 km; the five largest:

1. 6.9 The 1940 Imperial Valley, California Earthquake · 8 km NE of this epicentre May 19, 1940
2. 6.6 The 1942 Fish Creek Mountains, California Earthquake · 37 km WNW of this epicentre Oct 21, 1942
3. 6.6 The 1987 Superstition Hills, California Earthquake · 44 km WNW of this epicentre Nov 24, 1987
4. 6.4 The 1979 Imperial Valley Earthquake, California-Baja California · 17 km SSE of this epicentre Oct 15, 1979
5. 6.3 The 1906 Imperial Valley, California Earthquake · 12 km NNW of this epicentre Apr 19, 1906

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 32.8000, -115.4518. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.8 6km WSW of Holtville, CA 05:16 UTC
2. 1.6 22km NNE of Ocotillo, CA 23:30 UTC
3. 1.6 20km ESE of Ocotillo, CA 02:41 UTC
4. 2.1 8km W of Progreso, B.C., MX 18:01 UTC
5. 1.7 5km SW of Niland, CA 02:08 UTC
6. 1.9 10km SW of Niland, CA 01:08 UTC
7. 1.6 3km SSW of Imperial, CA 00:21 UTC
8. 1.5 3km SSW of Imperial, CA 00:17 UTC
9. 1.6 6km SSE of Brawley, CA 03:54 UTC
10. 1.5 9km W of Holtville, CA 17:24 UTC
11. 2.7 8km WNW of Holtville, CA 13:53 UTC
12. 2.6 9km WNW of Holtville, CA 13:50 UTC
13. 2.6 12km WSW of Puebla, B.C., MX 20:10 UTC
14. 1.8 24km WSW of Westmorland, CA 01:31 UTC
15. 1.7 7km SW of Niland, CA 22:27 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:16 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.