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M2.1 earthquake 38 km WSW of Hawaiian Paradise Park, United States

A magnitude 2.1 earthquake struck 38 km WSW of Hawaiian Paradise Park, United States at 05:06 local time (15:06 UTC) on 4 Oct 2026, at a depth of 0 km, according to USGS.

revised from M2.4

Data: USGS · updated 2026-10-05 18:26 UTC · reviewed

Magnitude
2.1micro
local magnitude (Richter) (ml)
revised from 2.4
Depth
0.3 km
Status
Reviewed
Origin time
2026-10-04 15:06:20 UTC
Local: 4 Oct 2026, 05:06:20 (Pacific/Honolulu)
Epicentre
19.415° N, 155.279° 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
Hawaiian Paradise ParkHawaii, United States · pop. 11,40438 kmINot felt
HiloHawaii, United States · pop. 43,26340 kmINot felt
HonoluluHawaii, United States · pop. 350,964342 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. Likely felt out to about 6 km.

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 · HV, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey2.1 mlwas 2.40.3 km19.41° N, 155.28° W–Reviewed · 1 revision

How big was it?

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

It released roughly the energy of 22 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 0 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.1 releases about 33× the energy of M1.1, and its waves are about 10× taller on a seismogram. Energy: 22 kg of TNT vs 674 g of TNT.

Each square is the energy of one M1.1. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

187 later earthquakes within 30 km; the largest was M3.6 38 days ago. 101 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.901.829
12.281.632
14.861.57
19.251.830
21.423.628
45.761.60
48.771.19
48.781.929
53.721.934
55.341.633
55.641.58
57.460.727
58.731.832
58.821.833
65.771.829
66.961.68
72.981.62
83.211.82
85.281.62
87.751.026
95.861.948
95.941.950
100.711.929
101.171.928
107.371.927
131.731.91
137.401.133
145.231.71
148.081.90
149.041.81
150.551.81
155.941.712
172.831.86
175.690.81
176.051.62
176.281.52
176.361.62
176.371.82
176.460.91
177.191.830
177.311.82
179.451.81
179.961.137
180.721.41
187.571.730
198.370.51
198.371.82
200.381.72
201.711.440
202.053.16
202.230.52
206.341.67
206.641.75
206.741.43
210.221.27
216.971.932
218.002.42
219.420.82
222.042.12
222.322.02
225.460.92
225.502.232
225.801.01
226.011.930
227.011.95
230.982.02
233.551.840
235.681.337
235.741.839
235.831.738
236.691.80
237.521.628
240.091.930
242.681.428
251.060.92
251.081.729
263.032.02
272.641.845
277.071.828
277.551.625
279.921.830
280.141.67
280.921.52
282.451.57
284.861.89
294.741.434
295.181.80
296.571.731
296.931.77
299.351.70
304.151.741
306.591.431
307.011.729
307.291.129
308.291.728
311.231.77
312.881.433
314.412.20
314.691.02
315.751.90
315.951.81
316.291.10
316.301.31
317.791.80
319.811.831
328.711.71
329.831.729
335.282.18
335.431.48
338.370.90
338.372.16
338.671.70
339.231.62
340.411.76
343.442.241
349.021.929
350.561.830
352.141.99
366.531.38
366.921.931
377.161.929
377.431.80
377.571.736
377.571.942
382.441.828
395.501.46
397.231.730
408.721.23
408.721.63
413.831.929
439.042.22
440.511.97
445.411.75
448.671.51
453.211.83
455.721.829
458.631.631
458.731.130
460.711.81
462.681.9-1
463.521.82
470.782.3-1
474.451.4-1
492.211.76
494.951.847
506.631.228
512.581.740
513.322.11
513.691.9-1
514.181.931
526.151.840
538.581.841
557.951.325
560.192.60
560.821.230
573.741.233
578.401.828
581.431.47
581.961.78
589.352.026
592.111.929
601.431.41
601.432.01
610.191.930
612.821.84
613.751.91
626.141.90
640.952.00
642.231.79
643.781.829
643.981.430
647.221.62
647.261.92
647.511.72
647.571.92
649.861.71
656.401.72
656.412.22
659.901.846
659.912.052
674.851.827
677.430.83
677.901.829
680.791.67
692.172.02
693.721.829
695.121.726
  1. 3.643 km SW of Hawaiian Paradise Park, United States10-05 12:31
  2. 3.128 km SSW of Hawaiian Paradise Park, United States10-13 01:09
  3. 2.646 km WSW of Hilo, Hawaii, United States10-27 23:17
  4. 2.439 km SW of Hawaiian Paradise Park, United States10-13 17:06
  5. 2.348 km WSW of Hilo, Hawaii, United States10-24 05:53
  6. 2.247 km SSW of Hawaiian Paradise Park, United States10-18 22:32
  7. 2.239 km SW of Hawaiian Paradise Park, United States10-31 23:31
  8. 2.266 km SW of Hawaiian Paradise Park, United States10-14 00:36
  9. 2.243 km SW of Hawaiian Paradise Park, United States10-22 22:08
  10. 2.238 km WSW of Hawaiian Paradise Park, United States10-17 17:31
  11. 2.137 km SW of Hawaiian Paradise Park, United States10-18 17:28
  12. 2.141 km SW of Hawaiian Paradise Park, United States10-18 14:23
  13. 2.139 km SW of Hawaiian Paradise Park, United States10-13 21:08
  14. 2.137 km SW of Hawaiian Paradise Park, United States10-26 00:25
  15. 2.039 km WSW of Hawaiian Paradise Park, United States10-15 14:08
  16. 2.067 km SW of Hawaiian Paradise Park, United States10-31 08:03
  17. 2.040 km SW of Hawaiian Paradise Park, United States10-29 16:32
  18. 2.039 km SW of Hawaiian Paradise Park, United States11-02 11:16
  19. 2.037 km SW of Hawaiian Paradise Park, United States10-13 21:25
  20. 2.039 km SW of Hawaiian Paradise Park, United States10-14 06:05
  21. 2.062 km SW of Hawaiian Paradise Park, United States10-29 04:27
  22. 2.056 km SSW of Hawaiian Paradise Park, United States11-01 03:00
  23. 1.959 km SW of Hawaiian Paradise Park, United States10-09 02:28
  24. 1.937 km SW of Hawaiian Paradise Park, United States10-26 00:47
  25. 1.943 km SW of Hawaiian Paradise Park, United States10-08 19:49

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Reports on SeismoAtlas

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Event id hv75049717. First recorded here 4 Oct 2026, 15:10:16 UTC. Solutions: USGS · HV (usgs:hv75049717). Cite as: SeismoAtlas, “M2.1 earthquake 38 km WSW of Hawaiian Paradise Park, United States”, https://seismoatlas.com/earthquake/hv75049717-m2-1-earthquake-38-km-wsw-of-hawaiian-paradise-park-united-states, data from USGS.

JSON: /api/v1/events/hv75049717. SeismoAtlas is not an official warning service.