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M1.2 earthquake near Loma Linda, California, United States

A magnitude 1.2 earthquake struck near Loma Linda, California, United States at 01:36 local time (08:36 UTC) on 30 Oct 2026, at a depth of 4 km, according to USGS. The solution is preliminary and may be revised.

revised from M1.4

Data: USGS · updated 2026-10-30 08:40 UTC · automatic solution

Magnitude
1.2micro
local magnitude (Richter) (ml)
revised from 1.4
Depth
3.6 km
Status
Automatic
Origin time
2026-10-30 08:36:36 UTC
Local: 30 Oct 2026, 01:36:36 (America/Los Angeles)
Epicentre
34.030° N, 117.243° 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
Loma LindaCalifornia, United States · pop. 24,0453 kmIIWeak
Grand TerraceCalifornia, United States · pop. 12,4646 kmINot felt
RedlandsCalifornia, United States · pop. 71,0357 kmINot felt
ColtonCalifornia, United States · pop. 54,6218 kmINot felt
San BernardinoCalifornia, United States · pop. 216,10810 kmINot felt
RiversideCalifornia, United States · pop. 317,26117 kmINot felt
AnaheimCalifornia, United States · pop. 350,74265 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22766 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.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey1.2 mlwas 1.43.6 km34.03° N, 117.24° W–Automatic · 1 revision

How big was it?

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

It released roughly the energy of 888 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 4 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: 888 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

58 later earthquakes within 30 km; the largest was M2.1 12 days ago. 65 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.140.93
0.360.75
0.370.75
0.400.54
0.810.96
0.821.65
0.871.06
1.960.85
3.700.74
3.701.14
8.021.010
11.530.97
14.651.04
23.650.613
24.271.09
27.920.76
28.231.25
28.260.95
28.421.08
33.062.16
41.021.04
42.270.65
50.420.316
51.350.75
64.951.19
85.211.113
93.942.014
94.050.612
107.131.514
117.840.413
117.850.916
118.210.713
118.250.714
124.170.817
142.710.716
149.440.99
166.600.617
167.651.04
174.440.97
181.091.40
181.181.316
188.441.513
190.401.017
191.231.016
192.761.16
192.780.915
230.890.917
236.260.87
254.191.417
255.301.55
262.491.113
264.831.18
265.640.99
275.041.08
281.300.93
307.981.110
309.760.414
317.761.69
  1. 2.1Near Loma Linda, California, United States10-31 17:40
  2. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  3. 1.6Near Loma Linda, California, United States10-30 09:25
  4. 1.64 km N of Jurupa Valley, California, United States11-12 14:22
  5. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  6. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  7. 1.5Near Loma Linda, California, United States11-07 05:02
  8. 1.4Near Beaumont, California, United States11-09 22:48
  9. 1.4Near Home Gardens, California, United States11-06 21:41
  10. 1.36 km SSW of Redlands, California, United States11-06 21:47
  11. 1.2Near Loma Linda, California, United States10-31 12:50
  12. 1.111 km NW of Muscoy, California, United States11-10 07:05
  13. 1.1Near Loma Linda, California, United States11-07 09:22
  14. 1.1Near Cherry Valley, California, United States11-10 09:26
  15. 1.1Near Loma Linda, California, United States10-30 12:18
  16. 1.113 km NE of Rancho Cucamonga, California, United States11-02 01:33
  17. 1.114 km WNW of Muscoy, California, United States11-12 04:35
  18. 1.13 km NNW of Cherry Valley, California, United States11-02 21:48
  19. 1.0Near Cherry Valley, California, United States10-31 13:02
  20. 1.04 km SW of Redlands, California, United States11-06 08:15
  21. 1.04 km NW of Muscoy, California, United States10-30 16:37
  22. 1.04 km N of Jurupa Valley, California, United States10-31 08:53
  23. 1.0Near Loma Linda, California, United States11-01 01:37
  24. 1.0Near Loma Linda, California, United States10-30 23:15
  25. 1.05 km NNW of Fontana, California, United States11-10 19:39

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Reports on SeismoAtlas

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Event id ci41569504. First recorded here 30 Oct 2026, 08:39:49 UTC. Solutions: USGS · CI (usgs:ci41569504). Cite as: SeismoAtlas, “M1.2 earthquake near Loma Linda, California, United States”, https://seismoatlas.com/earthquake/ci41569504-m1-2-earthquake-near-loma-linda-california-united-states, data from USGS.

JSON: /api/v1/events/ci41569504. SeismoAtlas is not an official warning service.