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M0.3 earthquake 9 km SW of Corona, California, United States

A magnitude 0.3 earthquake struck 9 km SW of Corona, California, United States at 12:45 local time (19:45 UTC) on 6 Oct 2026, at a depth of 6 km, according to USGS.

Data: USGS · updated 2026-10-06 20:03 UTC · reviewed

Magnitude
0.3micro
local magnitude (Richter) (ml)
Depth
5.6 km
Status
Reviewed
Origin time
2026-10-06 19:45:25 UTC
Local: 6 Oct 2026, 12:45:25 (America/Los Angeles)
Epicentre
33.826° N, 117.650° 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

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
CoronaCalifornia, United States · pop. 164,2269 kmINot felt
El Cerrito CoronaCalifornia, United States · pop. 5,10012 kmINot felt
NorcoCalifornia, United States · pop. 26,28915 kmINot felt
North TustinCalifornia, United States · pop. 24,91715 kmINot felt
Yorba LindaCalifornia, United States · pop. 67,97316 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22722 kmINot felt
IrvineCalifornia, United States · pop. 256,92723 kmINot felt
AnaheimCalifornia, United States · pop. 350,74224 kmINot 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.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey0.3 ml5.6 km33.83° N, 117.65° W–Reviewed

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 38 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 6 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.0 releases about 12× the energy of M0.3, and its waves are about 5.4× taller on a seismogram. Energy: 477 g of TNT vs 38 g of TNT.

Each square is the energy of one M0.3. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

26 later earthquakes within 30 km; the largest was M1.8 8 days ago. 9 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.3

26 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
27.890.30
60.630.75
74.061.75
74.101.50
187.561.210
192.421.70
240.171.22
240.971.04
298.750.210
335.851.1-1
406.831.3-1
452.521.48
465.011.18
481.301.4-1
500.520.98
504.290.90
531.501.0-1
550.751.40
558.681.37
575.270.90
589.131.09
677.811.511
681.531.810
692.171.24
697.761.10
719.771.80
  1. 1.85 km ESE of Yorba Linda, California, United States11-04 05:16
  2. 1.8Near El Cerrito Corona, California, United States11-05 19:31
  3. 1.77 km WNW of Jurupa Valley, California, United States10-09 21:48
  4. 1.7Near El Cerrito Corona, California, United States10-14 20:10
  5. 1.5Near Placentia, California, United States11-04 01:33
  6. 1.54 km ESE of El Cerrito Corona, California, United States10-09 21:51
  7. 1.4Near El Cerrito Corona, California, United States10-29 18:30
  8. 1.43 km ENE of El Cerrito Corona, California, United States10-26 21:03
  9. 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
  10. 1.37 km NNW of Eastvale, California, United States10-30 02:26
  11. 1.3Near El Cerrito Corona, California, United States10-23 18:35
  12. 1.2Near El Cerrito Corona, California, United States10-16 19:55
  13. 1.24 km SSW of Yorba Linda, California, United States10-14 15:18
  14. 1.26 km WNW of Jurupa Valley, California, United States11-04 15:55
  15. 1.1Near Home Gardens, California, United States10-20 19:36
  16. 1.1Near Anaheim, California, United States10-26 04:46
  17. 1.1Near El Cerrito Corona, California, United States11-04 21:30
  18. 1.011 km SW of Corona, California, United States10-16 20:43
  19. 1.0Near Home Gardens, California, United States10-28 23:15
  20. 1.04 km N of Jurupa Valley, California, United States10-31 08:53
  21. 0.9Near Home Gardens, California, United States10-27 20:03
  22. 0.99 km S of Los Serranos, California, United States10-27 16:16
  23. 0.9Near Home Gardens, California, United States10-30 19:01
  24. 0.77 km WNW of Jurupa Valley, California, United States10-09 08:22
  25. 0.311 km E of Villa Park, California, United States10-07 23:38

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id ci41344183. First recorded here 6 Oct 2026, 20:04:21 UTC. Solutions: USGS · CI (usgs:ci41344183). Cite as: SeismoAtlas, “M0.3 earthquake 9 km SW of Corona, California, United States”, https://seismoatlas.com/earthquake/ci41344183-m0-3-earthquake-9-km-sw-of-corona-california-united-states, data from USGS.

JSON: /api/v1/events/ci41344183. SeismoAtlas is not an official warning service.