Earthquake · Reviewed by USGS

M1.1 earthquake 8 km N of Rancho Cucamonga, CA

A magnitude 1.1 earthquake struck 8 km N of Rancho Cucamonga, CA at Oct 31, 2026, 01:58 UTC, at a depth of 4 km. The epicentre was 10 km (6 mi) N of Rancho Cucamonga.

Details

Magnitude	1.1 ml
Time	Oct 31, 2026, 01:58 UTC
Depth	4.1 km
Coordinates	34.199, -117.582
Felt reports	0
Tsunami flag	None
Source	USGS event page

Fig. 1The epicentre and other earthquakes within 100 km, since the day before

01 — Nearby

Nearest cities

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
Magnitude	Location	Distance	Depth	Time
1.4	10 km ESE of Big Bear City, CA	77 km / 48 mi	depth 1 km	Nov 3, 20:11 UTC
1.6	4 km NE of Beaumont, CA	65 km / 40 mi	depth 14 km	Nov 3, 19:44 UTC
1.9	12 km NE of Cabazon, CA	83 km / 51 mi	depth 15 km	Nov 3, 19:07 UTC
2.0	7 km W of Calimesa, CA	47 km / 29 mi	depth 14 km	Nov 3, 06:33 UTC
1.8	5 km NNW of Boron, CA	94 km / 58 mi	depth -1 km	Nov 3, 00:29 UTC
1.1	5 km E of Calimesa, CA	58 km / 36 mi	depth 13 km	Nov 2, 21:48 UTC
1.7	6 km ENE of San Jacinto, CA	76 km / 47 mi	depth 13 km	Nov 2, 12:49 UTC
1.2	15 km NW of Aguanga, CA	92 km / 57 mi	depth 11 km	Nov 2, 09:41 UTC
1.1	3 km N of Big Bear City, CA	68 km / 42 mi	depth 8 km	Nov 2, 04:33 UTC
1.1	7 km S of Lytle Creek, CA	8 km / 5 mi	depth 9 km	Nov 2, 01:33 UTC
1.8	2 km SE of Chatsworth, CA	93 km / 58 mi	depth 17 km	Nov 1, 10:08 UTC
1.0	2 km SE of Loma Linda, CA	36 km / 22 mi	depth 4 km	Nov 1, 01:37 UTC
1.1	5 km NNE of Banning, CA	72 km / 44 mi	depth 17 km	Nov 1, 00:42 UTC
1.1	2 km SE of Rancho Cucamonga, CA	10 km / 6 mi	depth 11 km	Oct 31, 22:04 UTC
1.8	2 km ENE of Gardena, CA	73 km / 45 mi	depth 12 km	Oct 31, 21:31 UTC
2.1	2 km SE of Loma Linda, CA	36 km / 22 mi	depth 6 km	Oct 31, 17:40 UTC
1.0	4 km NNE of Beaumont, CA	63 km / 39 mi	depth 8 km	Oct 31, 13:02 UTC
1.4	7 km SE of San Pedro, CA	84 km / 52 mi	depth 7 km	Oct 31, 12:53 UTC
1.2	2 km SE of Loma Linda, CA	36 km / 22 mi	depth 5 km	Oct 31, 12:50 UTC
1.0	4 km WNW of Glen Avon, CA	20 km / 13 mi	depth 9 km	Oct 31, 08:53 UTC
1.0	2 km SE of Loma Linda, CA	36 km / 22 mi	depth 4 km	Oct 30, 23:15 UTC
1.0	3 km NW of Muscoy, CA	19 km / 12 mi	depth 10 km	Oct 30, 16:37 UTC
1.1	2 km SE of Loma Linda, CA	36 km / 23 mi	depth 4 km	Oct 30, 12:18 UTC
1.1	2 km SE of South El Monte, CA	45 km / 28 mi	depth 11 km	Oct 30, 10:21 UTC
1.6	2 km SE of Loma Linda, CA	36 km / 23 mi	depth 5 km	Oct 30, 09:25 UTC

USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.