Skip to content
SeismoAtlas

M1.7 earthquake 7 km WNW of Jurupa Valley, California, United States

A magnitude 1.7 earthquake struck 7 km WNW of Jurupa Valley, California, United States at 14:48 local time (21:48 UTC) on 9 Oct 2026, at a depth of 5 km, according to USGS.

Data: USGS · updated 2026-10-09 22:30 UTC · reviewed

Magnitude
1.7micro
local magnitude (Richter) (ml)
Depth
5.3 km
Status
Reviewed
Origin time
2026-10-09 21:48:51 UTC
Local: 9 Oct 2026, 14:48:51 (America/Los Angeles)
Epicentre
34.019° N, 117.587° 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
Jurupa ValleyCalifornia, United States · pop. 21,9307 kmINot felt
EastvaleCalifornia, United States · pop. 59,0397 kmINot felt
OntarioCalifornia, United States · pop. 171,2147 kmINot felt
ChinoCalifornia, United States · pop. 85,59510 kmINot felt
RiversideCalifornia, United States · pop. 317,26119 kmINot felt
AnaheimCalifornia, United States · pop. 350,74236 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22740 kmINot felt
IrvineCalifornia, United States · pop. 256,92744 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 Survey1.7 mlwas 1.65.3 km34.02° N, 117.59° 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 5 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 5 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.7 releases about 11× the energy of M1.0, and its waves are about 5× taller on a seismogram. Energy: 5 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

59 later earthquakes within 30 km; the largest was M2.0 20 days ago. 43 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.041.50
20.031.516
53.291.13
74.251.54
113.501.210
114.691.04
118.361.70
166.121.22
166.911.04
170.071.56
196.971.04
261.571.06
261.791.1-1
268.740.77
294.311.37
318.250.53
323.782.07
323.821.67
323.821.37
324.790.87
332.781.3-1
361.340.89
364.830.78
374.700.611
378.461.48
389.671.012
399.471.67
401.861.06
407.241.4-1
409.360.97
412.740.77
426.460.98
430.240.90
435.821.213
457.441.0-1
476.691.40
484.631.37
498.821.010
501.210.90
507.950.94
508.161.14
512.920.913
515.071.09
528.271.111
555.741.19
603.751.511
607.471.810
618.121.24
623.701.10
645.721.80
652.950.914
652.960.413
658.801.113
665.230.97
670.521.2-1
671.881.40
672.151.60
683.580.915
713.821.011
  1. 2.04 km WNW of Fontana, California, United States10-23 09:35
  2. 1.85 km ESE of Yorba Linda, California, United States11-04 05:16
  3. 1.8Near El Cerrito Corona, California, United States11-05 19:31
  4. 1.7Near El Cerrito Corona, California, United States10-14 20:10
  5. 1.64 km W of Fontana, California, United States10-26 13:17
  6. 1.64 km ESE of El Cerrito Corona, California, United States11-06 21:57
  7. 1.64 km WNW of Fontana, California, United States10-23 09:37
  8. 1.5Near Colton, California, United States10-10 17:50
  9. 1.514 km WNW of Muscoy, California, United States10-16 23:53
  10. 1.5Near Fontana, California, United States10-13 00:04
  11. 1.5Near Placentia, California, United States11-04 01:33
  12. 1.54 km ESE of El Cerrito Corona, California, United States10-09 21:51
  13. 1.4Near El Cerrito Corona, California, United States10-29 18:30
  14. 1.43 km ENE of El Cerrito Corona, California, United States10-26 21:03
  15. 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
  16. 1.4Near Home Gardens, California, United States11-06 21:41
  17. 1.37 km NNW of Eastvale, California, United States10-30 02:26
  18. 1.314 km WNW of Muscoy, California, United States10-22 04:07
  19. 1.3Near El Cerrito Corona, California, United States10-23 18:35
  20. 1.34 km WNW of Fontana, California, United States10-23 09:38
  21. 1.2Near El Cerrito Corona, California, United States10-16 19:55
  22. 1.2Near Home Gardens, California, United States11-06 20:20
  23. 1.24 km SSW of Yorba Linda, California, United States10-14 15:18
  24. 1.26 km WNW of Jurupa Valley, California, United States11-04 15:55
  25. 1.27 km NW of Muscoy, California, United States10-28 01:37

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 ci41345799. First recorded here 9 Oct 2026, 21:52:14 UTC. Solutions: USGS · CI (usgs:ci41345799). Cite as: SeismoAtlas, “M1.7 earthquake 7 km WNW of Jurupa Valley, California, United States”, https://seismoatlas.com/earthquake/ci41345799-m1-7-earthquake-7-km-wnw-of-jurupa-valley-california-united-states, data from USGS.

JSON: /api/v1/events/ci41345799. SeismoAtlas is not an official warning service.