Earthquake near Calimesa, CA

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Calimesa, 7 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: Cherry Valley, Yucaipa, Beaumont, Banning, Mentone, Redlands.

How big was it?

This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
3. Around the size people start to feel M 3.0 120× the energy of this one
4. This earthquake M 1.6 about 7.8 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 4.5 on 2018-05-08 — about 21,000 times the energy of this one.

Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:

1. 6.7 The 1918 San Jacinto, California Earthquake · 26 km S of this epicentre Apr 21, 1918
2. 6.3 The 1992 Big Bear, California Earthquake · 28 km NNE of this epicentre Jun 28, 1992
3. 6.2 3 km SE of San Bernardino, California · 27 km WNW of this epicentre Jul 23, 1923
4. 6.0 The 1986 North Palm Springs, California Earthquake · 35 km E of this epicentre Jul 8, 1986
5. 5.6 7km ENE of Running Springs, CA · 28 km N of this epicentre Oct 16, 1999

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 33.9932, -116.9885. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.3 10km SSW of Valle Vista, CA 17:01 UTC
2. 1.5 3km SSE of Garnet, CA 05:22 UTC
3. 1.8 10km WNW of Big Bear Lake, CA 14:37 UTC
4. 1.5 4km SE of Home Gardens, CA 19:26 UTC
5. 2.3 10km WNW of Big Bear Lake, CA 21:31 UTC
6. 1.6 10km WNW of Big Bear Lake, CA 02:29 UTC
7. 1.6 1km NE of Mira Loma, CA 06:41 UTC
8. 1.6 6km NW of Glen Avon, CA 09:40 UTC
9. 2.5 9km SSE of Running Springs, CA 06:47 UTC
10. 1.7 5km N of Lake Elsinore, CA 14:58 UTC
11. 1.5 7km NE of Desert Hot Springs, CA 06:41 UTC
12. 1.5 4km SSE of Beaumont, CA 05:58 UTC
13. 1.5 4km SE of Home Gardens, CA 17:31 UTC
14. 1.9 3km ESE of Valle Vista, CA 16:09 UTC
15. 2.6 10km SW of Morongo Valley, CA 19:24 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:12 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.