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M1.2 earthquake 4 km SSW of Yorba Linda, California, United States

A magnitude 1.2 earthquake struck 4 km SSW of Yorba Linda, California, United States at 08:18 local time (15:18 UTC) on 14 Oct 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-10-14 17:25 UTC · reviewed

Magnitude
1.2micro
local magnitude (Richter) (ml)
Depth
9.9 km
Status
Reviewed
Origin time
2026-10-14 15:18:47 UTC
Local: 14 Oct 2026, 08:18:47 (America/Los Angeles)
Epicentre
33.857° N, 117.824° 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
Yorba LindaCalifornia, United States · pop. 67,9734 kmINot felt
PlacentiaCalifornia, United States · pop. 52,4954 kmINot felt
OrangeCalifornia, United States · pop. 140,9928 kmINot felt
AnaheimCalifornia, United States · pop. 350,7428 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22713 kmINot felt
IrvineCalifornia, United States · pop. 256,92721 kmINot felt
Long BeachCalifornia, United States · pop. 474,14035 kmINot felt
RiversideCalifornia, United States · pop. 317,26140 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 Survey1.2 mlwas 1.39.9 km33.86° N, 117.82° 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 919 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.2 releases about 1.9× the energy of M1.0, and its waves are about 1.5× taller on a seismogram. Energy: 919 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

24 later earthquakes within 30 km; the largest was M1.8 8 days ago. 3 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
52.621.22
53.411.04
108.830.613
237.321.513
250.701.212
277.461.18
312.960.98
316.740.90
371.131.37
379.051.111
387.710.90
399.420.913
490.251.511
493.971.810
504.621.24
539.711.314
546.170.512
557.021.2-1
558.391.40
626.130.612
680.161.310
689.801.116
697.241.013
701.990.91
  1. 1.85 km ESE of Yorba Linda, California, United States11-04 05:16
  2. 1.5Near Placentia, California, United States11-04 01:33
  3. 1.53 km ESE of Huntington Beach, California, United States10-24 12:37
  4. 1.4Near Home Gardens, California, United States11-06 21:41
  5. 1.37 km NNW of Eastvale, California, United States10-30 02:26
  6. 1.33 km SW of Yorba Linda, California, United States11-11 23:28
  7. 1.3Near La Mirada, California, United States11-06 03:01
  8. 1.2Near El Cerrito Corona, California, United States10-16 19:55
  9. 1.2Near Stanton, California, United States10-25 02:00
  10. 1.2Near Home Gardens, California, United States11-06 20:20
  11. 1.26 km WNW of Jurupa Valley, California, United States11-04 15:55
  12. 1.1Near South El Monte, California, United States10-30 10:21
  13. 1.1Near Anaheim, California, United States10-26 04:46
  14. 1.1Near Yorba Linda, California, United States11-12 09:06
  15. 1.011 km SW of Corona, California, United States10-16 20:43
  16. 1.0Near Charter Oak, California, United States11-12 16:33
  17. 0.9Near Home Gardens, California, United States11-12 21:18
  18. 0.94 km S of San Dimas, California, United States10-31 06:44
  19. 0.9Near Home Gardens, California, United States10-27 20:03
  20. 0.99 km S of Los Serranos, California, United States10-27 16:16
  21. 0.9Near Home Gardens, California, United States10-30 19:01
  22. 0.6Near Covina, California, United States10-19 04:08
  23. 0.6Near Charter Oak, California, United States11-09 17:26
  24. 0.5Near El Monte, California, United States11-06 09:28

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 ci41347519. First recorded here 14 Oct 2026, 15:21:02 UTC. Solutions: USGS · CI (usgs:ci41347519). Cite as: SeismoAtlas, “M1.2 earthquake 4 km SSW of Yorba Linda, California, United States”, https://seismoatlas.com/earthquake/ci41347519-m1-2-earthquake-4-km-ssw-of-yorba-linda-california-united-states, data from USGS.

JSON: /api/v1/events/ci41347519. SeismoAtlas is not an official warning service.