Earthquake near Big Bear City, CA

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 11 km (7 mi) from the epicentre. In Big Bear City, 8 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.

Likely felt in: Big Bear City 8 km, intensity II. Estimated for each town centre; each link is that town's own record.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 7.6 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 2,000,000× 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 3.0 130× the energy of this one
4. This earthquake M 1.6 about 7.6 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 22,000 times the energy of this one.

Before 2016, the USGS record lists 27 earthquakes of M5 or more within 50 km; the five largest:

1. 7.3 The 1992 Landers, California Earthquake · 41 km ESE of this epicentre Jun 28, 1992
2. 6.3 The 1992 Big Bear, California Earthquake · 15 km S of this epicentre Jun 28, 1992
3. 6.2 3 km SE of San Bernardino, California · 46 km SW of this epicentre Jul 23, 1923
4. 6.0 The 1986 North Palm Springs, California Earthquake · 44 km SSE of this epicentre Jul 8, 1986
5. 5.8 3km NE of Yucca Valley, California · 47 km ESE of this epicentre Jun 28, 1992

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 34.3363, -116.8527. 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. 1.9 9km WNW of Big Bear Lake, CA 15:05 UTC
2. 1.6 8km ESE of Big Bear City, CA 20:32 UTC
3. 1.6 3km ESE of Loma Linda, CA 11:31 UTC
4. 1.7 3km SW of Calimesa, CA 17:01 UTC
5. 1.6 15km W of Morongo Valley, CA 03:16 UTC
6. 1.6 5km S of Redlands, CA 00:45 UTC
7. 3.1 5km SSW of Big Bear Lake, CA 22:14 UTC
8. 1.6 7km S of Redlands, CA 13:00 UTC
9. 1.5 3km NNW of Cabazon, CA 05:37 UTC
10. 2.0 5km ENE of Banning, CA 23:26 UTC
11. 1.5 6km NE of Cabazon, CA 12:37 UTC
12. 1.6 4km SE of Loma Linda, CA 18:25 UTC
13. 2.1 2km ESE of Yucaipa, CA 03:01 UTC
14. 1.9 14km S of Big Bear City, CA 22:11 UTC
15. 1.7 12km NE of Running Springs, CA 10:26 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:59 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.