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M1.3 earthquake 3 km SE of Loma Linda, California, United States

A magnitude 1.3 earthquake struck 3 km SE of Loma Linda, California, United States at 08:24 local time (15:24 UTC) on 19 Oct 2026, at a depth of 17 km, according to USGS.

Data: USGS · updated 2026-10-19 19:41 UTC · reviewed

Magnitude
1.3micro
local magnitude (Richter) (ml)
Depth
16.9 km
Status
Reviewed
Origin time
2026-10-19 15:24:01 UTC
Local: 19 Oct 2026, 08:24:01 (America/Los Angeles)
Epicentre
34.032° N, 117.235° 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 kmINot felt
RedlandsCalifornia, United States · pop. 71,0356 kmINot felt
ColtonCalifornia, United States · pop. 54,6218 kmINot felt
San BernardinoCalifornia, United States · pop. 216,10810 kmINot felt
RiversideCalifornia, United States · pop. 317,26118 kmINot felt
AnaheimCalifornia, United States · pop. 350,74266 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22767 kmINot felt
IrvineCalifornia, United States · pop. 256,92767 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 Survey1.3 mlwas 1.416.9 km34.03° N, 117.23° 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 1 kg 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 17 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.3 releases about 2.8× the energy of M1.0, and its waves are about 2× taller on a seismogram. Energy: 1 kg 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

144 later earthquakes within 30 km; the largest was M2.2 13 days ago. 19 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.061.317
16.301.411
27.961.014
27.991.06
35.160.77
36.961.117
49.931.015
60.721.37
63.850.94
64.321.04
64.721.34
66.190.95
66.460.95
67.121.213
74.221.114
78.171.113
84.660.53
85.551.84
85.580.96
86.441.05
86.441.55
87.250.715
89.001.34
90.202.07
90.231.67
90.241.37
91.210.87
117.970.99
125.701.13
127.230.71
127.750.89
130.381.613
136.710.811
137.050.76
141.110.611
144.881.48
159.770.612
165.891.67
166.290.68
168.271.06
173.331.02
175.780.97
177.150.813
177.151.011
179.150.77
180.380.92
183.451.012
202.231.213
212.260.36
217.011.14
217.251.26
218.051.34
218.110.85
219.711.15
220.251.15
220.291.85
220.421.14
223.020.85
223.331.07
223.341.34
223.552.05
224.031.33
226.890.614
226.960.94
227.171.14
227.780.84
229.310.83
245.820.94
250.672.24
250.810.94
251.862.26
251.871.37
251.881.04
251.900.94
252.290.94
252.291.23
253.571.36
253.581.87
254.310.65
254.580.73
254.670.68
255.630.54
255.970.96
255.971.06
255.980.74
256.970.84
257.211.24
257.350.93
257.570.75
257.580.75
257.610.54
258.020.96
258.031.65
258.081.06
259.170.85
260.910.74
260.911.14
265.231.010
268.740.97
271.861.04
280.860.613
281.481.09
285.130.76
285.441.25
285.470.95
285.631.08
290.272.16
298.231.04
299.480.65
307.630.316
308.560.75
342.421.113
351.152.014
351.260.612
364.341.514
375.050.413
375.060.916
375.420.713
375.460.714
381.380.817
399.920.716
406.650.99
423.810.617
424.861.04
431.650.97
438.391.316
445.641.513
447.611.017
448.441.016
449.971.16
449.990.915
488.100.917
493.470.87
511.401.417
512.511.55
519.701.113
522.041.18
522.850.99
532.251.08
538.510.93
565.191.110
565.260.917
566.970.414
574.971.69
  1. 2.2Near Loma Linda, California, United States10-30 02:04
  2. 2.2Near Loma Linda, California, United States10-30 03:15
  3. 2.1Near Loma Linda, California, United States10-31 17:40
  4. 2.04 km WNW of Fontana, California, United States10-23 09:35
  5. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  6. 2.0Near Loma Linda, California, United States10-28 22:56
  7. 1.8Near Loma Linda, California, United States10-28 19:41
  8. 1.8Near Loma Linda, California, United States10-30 04:58
  9. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  10. 1.64 km W of Fontana, California, United States10-26 13:17
  11. 1.6Near Loma Linda, California, United States10-30 09:25
  12. 1.64 km WNW of Fontana, California, United States10-23 09:37
  13. 1.64 km N of Jurupa Valley, California, United States11-12 14:22
  14. 1.65 km SE of Mentone, California, United States10-25 01:46
  15. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  16. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  17. 1.5Near Loma Linda, California, United States11-07 05:02
  18. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  19. 1.4Near Beaumont, California, United States11-09 22:48
  20. 1.43 km ESE of Nuevo, California, United States10-20 07:41
  21. 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
  22. 1.3Near Loma Linda, California, United States10-19 15:27
  23. 1.34 km SW of Redlands, California, United States10-28 23:25
  24. 1.35 km SW of Redlands, California, United States10-28 22:44
  25. 1.314 km WNW of Muscoy, California, United States10-22 04:07

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 ci41349335. First recorded here 19 Oct 2026, 15:27:16 UTC. Solutions: USGS · CI (usgs:ci41349335). Cite as: SeismoAtlas, “M1.3 earthquake 3 km SE of Loma Linda, California, United States”, https://seismoatlas.com/earthquake/ci41349335-m1-3-earthquake-3-km-se-of-loma-linda-california-united-states, data from USGS.

JSON: /api/v1/events/ci41349335. SeismoAtlas is not an official warning service.