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M2.4 earthquake near Loma Linda, California, United States

A magnitude 2.4 earthquake struck near Loma Linda, California, United States at 23:36 local time (06:36 UTC) on 18 Oct 2026, at a depth of 16 km, according to USGS.

revised from M2.5 · 1 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-10-19 15:20 UTC · reviewed

Magnitude
2.4micro
local magnitude (Richter) (ml)
revised from 2.5
Depth
15.7 km
Status
Reviewed
Origin time
2026-10-19 06:36:40 UTC
Local: 18 Oct 2026, 23:36:40 (America/Los Angeles)
Epicentre
34.048° N, 117.256° 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. 24,0450 kmIIWeak
Grand TerraceCalifornia, United States · pop. 12,4645 kmIIWeak
ColtonCalifornia, United States · pop. 54,6216 kmIIWeak
RedlandsCalifornia, United States · pop. 71,0357 kmIIWeak
San BernardinoCalifornia, United States · pop. 216,1088 kmIIWeak
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, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey2.4 mlwas 2.515.7 km34.05° N, 117.26° 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 60 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 16 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.4 releases about 32× the energy of M1.4, and its waves are about 10× taller on a seismogram. Energy: 60 kg of TNT vs 2 kg of TNT.

Each square is the energy of one M1.4. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

147 later earthquakes within 30 km; the largest was M2.2 13 days ago. 20 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.4

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
8.791.317
8.851.317
36.741.014
36.781.06
43.940.77
45.751.117
58.721.015
69.511.37
72.640.94
73.111.04
73.511.34
74.970.95
75.250.95
75.911.213
83.011.114
86.961.113
93.450.53
94.341.84
94.370.96
95.231.05
95.231.55
96.040.715
97.791.34
98.992.07
99.021.67
99.031.37
100.000.87
126.760.99
134.491.13
136.020.71
136.540.89
139.171.613
145.500.811
145.840.76
149.900.611
153.661.48
164.871.012
168.560.612
174.681.67
175.080.68
177.061.06
182.121.02
184.570.97
185.940.813
185.941.011
187.940.77
189.160.92
192.241.012
211.021.213
221.050.36
225.801.14
226.041.26
226.841.34
226.890.85
228.491.15
229.041.15
229.081.85
229.211.14
231.810.85
232.121.07
232.131.34
232.332.05
232.641.0-1
232.821.33
235.680.614
235.750.94
235.961.14
236.570.84
238.100.83
254.610.94
259.462.24
259.600.94
260.652.26
260.661.37
260.671.04
260.690.94
261.080.94
261.081.23
262.361.36
262.371.87
263.100.65
263.370.73
263.460.68
264.420.54
264.760.96
264.761.06
264.770.74
265.760.84
266.001.24
266.140.93
266.360.75
266.370.75
266.400.54
266.810.96
266.821.65
266.871.06
267.960.85
269.690.74
269.701.14
274.021.010
277.530.97
280.651.04
289.640.613
290.271.09
293.920.76
294.231.25
294.260.95
294.421.08
299.062.16
303.471.111
307.021.04
308.270.65
316.410.316
317.350.75
330.951.19
351.211.113
359.942.014
360.050.612
383.840.413
383.850.916
384.200.713
384.250.714
390.170.817
393.321.24
408.710.716
415.440.99
432.600.617
433.651.04
440.440.97
447.181.316
454.431.513
456.401.017
457.231.016
458.761.16
458.780.915
489.021.011
496.890.917
502.260.87
520.191.417
521.301.55
528.491.113
530.831.18
531.640.99
541.041.08
547.300.93
573.981.110
583.761.69
  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. 1.5Near Loma Linda, California, United States11-07 05:02
  17. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  18. 1.4Near Beaumont, California, United States11-09 22:48
  19. 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
  20. 1.3Near Loma Linda, California, United States10-19 15:27
  21. 1.34 km SW of Redlands, California, United States10-28 23:25
  22. 1.35 km SW of Redlands, California, United States10-28 22:44
  23. 1.314 km WNW of Muscoy, California, United States10-22 04:07
  24. 1.35 km SW of Redlands, California, United States10-23 08:24
  25. 1.36 km SSW of Redlands, California, United States11-06 21:47

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.

USGS “Did You Feel It?” has 1 reports: add yours at USGS.

Event id ci41349255. First recorded here 19 Oct 2026, 06:40:27 UTC. Solutions: USGS · CI (usgs:ci41349255). Cite as: SeismoAtlas, “M2.4 earthquake near Loma Linda, California, United States”, https://seismoatlas.com/earthquake/ci41349255-m2-4-earthquake-near-loma-linda-california-united-states, data from USGS.

JSON: /api/v1/events/ci41349255. SeismoAtlas is not an official warning service.