M1.1 earthquake 13 km NE of Rancho Cucamonga, California, United States
A magnitude 1.1 earthquake struck 13 km NE of Rancho Cucamonga, California, United States at 17:33 local time (01:33 UTC) on 1 Nov 2026, at a depth of 9 km, according to USGS.
Data: USGS · updated 2026-11-02 14:27 UTC · reviewed
- Magnitude
- 1.1micro
local magnitude (Richter) (ml) - Depth
- 9.3 km
- Status
- Reviewed
- Origin time
- 2026-11-02 01:33:32 UTC
- Local: 1 Nov 2026, 17:33:32 (America/Los Angeles)
- Epicentre
- 34.194° N, 117.498° W
Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map
Nearby places
| Place | Distance | Est. shaking |
|---|---|---|
| Rancho CucamongaCalifornia, United States · pop. 175,236 | 13 km | INot felt |
| FontanaCalifornia, United States · pop. 212,704 | 13 km | INot felt |
| RialtoCalifornia, United States · pop. 103,132 | 15 km | INot felt |
| BloomingtonCalifornia, United States · pop. 23,851 | 16 km | INot felt |
| RiversideCalifornia, United States · pop. 317,261 | 29 km | INot felt |
| AnaheimCalifornia, United States · pop. 350,742 | 55 km | INot felt |
| Santa AnaCalifornia, United States · pop. 310,227 | 60 km | INot felt |
| IrvineCalifornia, United States · pop. 256,927 | 65 km | INot felt |
Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.
Every agency's solution
Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · CI, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey | 1.1 mlwas 1.1 | 9.3 km | 34.19° N, 117.50° W | – | Reviewed · 2 revisions |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 629 g of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 9 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M1.1 releases about 1.3× the energy of M1.0, and its waves are about 1.2× taller on a seismogram. Energy: 629 g of TNT vs 477 g of TNT.
Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
17 later earthquakes within 30 km; the largest was M1.6 10 h ago. 63 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.1
17 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 62.37 | 1.2 | 4 |
| 77.76 | 0.7 | 16 |
| 87.32 | 0.9 | 6 |
| 97.20 | 0.9 | 14 |
| 97.21 | 0.4 | 13 |
| 103.06 | 1.1 | 13 |
| 109.49 | 0.9 | 7 |
| 125.46 | 1.0 | 17 |
| 126.28 | 1.0 | 16 |
| 127.81 | 1.1 | 6 |
| 127.84 | 0.9 | 15 |
| 158.08 | 1.0 | 11 |
| 171.32 | 0.8 | 7 |
| 197.54 | 1.1 | 13 |
| 210.09 | 1.0 | 8 |
| 243.04 | 1.1 | 10 |
| 252.81 | 1.6 | 9 |
- 1.64 km N of Jurupa Valley, California, United States11-12 14:22
- 1.26 km WNW of Jurupa Valley, California, United States11-04 15:55
- 1.111 km NW of Muscoy, California, United States11-10 07:05
- 1.1Near Loma Linda, California, United States11-07 09:22
- 1.114 km WNW of Muscoy, California, United States11-12 04:35
- 1.14 km SSW of Rancho Cucamonga, California, United States11-06 08:36
- 1.05 km ENE of Rancho Cucamonga, California, United States11-08 15:38
- 1.05 km NNW of Fontana, California, United States11-10 19:39
- 1.0Near Loma Linda, California, United States11-07 07:50
- 1.0Near Loma Linda, California, United States11-07 07:00
- 0.94 km SW of Piñon Hills, California, United States11-05 16:52
- 0.9Near San Bernardino, California, United States11-07 09:23
- 0.916 km NNE of Rancho Cucamonga, California, United States11-06 02:45
- 0.913 km NW of Muscoy, California, United States11-06 15:02
- 0.88 km NNW of Fontana, California, United States11-09 04:52
- 0.7Near Loma Linda, California, United States11-05 07:19
- 0.416 km N of Rancho Cucamonga, California, United States11-06 02:46
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
Event id ci41570968. First recorded here 2 Nov 2026, 01:36:36 UTC. Solutions: USGS · CI (usgs:ci41570968). Cite as: SeismoAtlas, “M1.1 earthquake 13 km NE of Rancho Cucamonga, California, United States”, https://seismoatlas.com/earthquake/ci41570968-m1-1-earthquake-13-km-ne-of-rancho-cucamonga-california-united-states, data from USGS.
JSON: /api/v1/events/ci41570968. SeismoAtlas is not an official warning service.