M1.0 earthquake 10 km SW of Corona, California, United States
A magnitude 1.0 earthquake struck 10 km SW of Corona, California, United States at 13:09 local time (20:09 UTC) on 3 Oct 2026, at a depth of 7 km, according to USGS.
Data: USGS · updated 2026-10-04 14:15 UTC · reviewed
- Magnitude
- 1.0micro
local magnitude (Richter) (ml) - Depth
- 6.9 km
- Status
- Reviewed
- Origin time
- 2026-10-03 20:09:07 UTC
- Local: 3 Oct 2026, 13:09:07 (America/Los Angeles)
- Epicentre
- 33.822° N, 117.658° 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 |
|---|---|---|
| CoronaCalifornia, United States · pop. 164,226 | 10 km | INot felt |
| El Cerrito CoronaCalifornia, United States · pop. 5,100 | 13 km | INot felt |
| North TustinCalifornia, United States · pop. 24,917 | 14 km | INot felt |
| NorcoCalifornia, United States · pop. 26,289 | 16 km | INot felt |
| Yorba LindaCalifornia, United States · pop. 67,973 | 16 km | INot felt |
| Santa AnaCalifornia, United States · pop. 310,227 | 21 km | INot felt |
| IrvineCalifornia, United States · pop. 256,927 | 23 km | INot felt |
| AnaheimCalifornia, United States · pop. 350,742 | 23 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 | 1.0 ml | 6.9 km | 33.82° N, 117.66° W | – | Reviewed · 1 revision |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 477 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 7 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
The same size.
Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
23 later earthquakes within 30 km; the largest was M1.7 34 days ago. 8 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.0
23 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 36.93 | 0.9 | 9 |
| 71.60 | 0.3 | 6 |
| 99.49 | 0.3 | 0 |
| 132.23 | 0.7 | 5 |
| 145.66 | 1.7 | 5 |
| 145.70 | 1.5 | 0 |
| 259.16 | 1.2 | 10 |
| 264.02 | 1.7 | 0 |
| 311.78 | 1.2 | 2 |
| 312.57 | 1.0 | 4 |
| 370.35 | 0.2 | 10 |
| 407.46 | 1.1 | -1 |
| 478.44 | 1.3 | -1 |
| 524.12 | 1.4 | 8 |
| 536.62 | 1.1 | 8 |
| 552.90 | 1.4 | -1 |
| 572.12 | 0.9 | 8 |
| 575.90 | 0.9 | 0 |
| 603.10 | 1.0 | -1 |
| 622.35 | 1.4 | 0 |
| 630.29 | 1.3 | 7 |
| 646.87 | 0.9 | 0 |
| 660.73 | 1.0 | 9 |
- 1.77 km WNW of Jurupa Valley, California, United States10-09 21:48
- 1.7Near El Cerrito Corona, California, United States10-14 20:10
- 1.54 km ESE of El Cerrito Corona, California, United States10-09 21:51
- 1.4Near El Cerrito Corona, California, United States10-29 18:30
- 1.43 km ENE of El Cerrito Corona, California, United States10-26 21:03
- 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
- 1.37 km NNW of Eastvale, California, United States10-30 02:26
- 1.3Near El Cerrito Corona, California, United States10-23 18:35
- 1.2Near El Cerrito Corona, California, United States10-16 19:55
- 1.24 km SSW of Yorba Linda, California, United States10-14 15:18
- 1.1Near Home Gardens, California, United States10-20 19:36
- 1.1Near Anaheim, California, United States10-26 04:46
- 1.011 km SW of Corona, California, United States10-16 20:43
- 1.0Near Home Gardens, California, United States10-28 23:15
- 1.04 km N of Jurupa Valley, California, United States10-31 08:53
- 0.94 km SE of Yorba Linda, California, United States10-05 09:05
- 0.9Near Home Gardens, California, United States10-27 20:03
- 0.99 km S of Los Serranos, California, United States10-27 16:16
- 0.9Near Home Gardens, California, United States10-30 19:01
- 0.77 km WNW of Jurupa Valley, California, United States10-09 08:22
- 0.311 km E of Villa Park, California, United States10-07 23:38
- 0.39 km SW of Corona, California, United States10-06 19:45
- 0.213 km WNW of Lake Elsinore, California, United States10-19 06:30
Did you feel it?
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Reports on SeismoAtlas
No reports yet.
Event id ci41342631. First recorded here 3 Oct 2026, 20:13:31 UTC. Solutions: USGS · CI (usgs:ci41342631). Cite as: SeismoAtlas, “M1.0 earthquake 10 km SW of Corona, California, United States”, https://seismoatlas.com/earthquake/ci41342631-m1-0-earthquake-10-km-sw-of-corona-california-united-states, data from USGS.
JSON: /api/v1/events/ci41342631. SeismoAtlas is not an official warning service.