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M2.1 earthquake 77 km SW of Hawaiian Paradise Park, United States

A magnitude 2.1 earthquake struck 77 km SW of Hawaiian Paradise Park, United States at 09:20 local time (19:20 UTC) on 17 Oct 2026, at a depth of 31 km, according to USGS.

Data: USGS · updated 2026-10-23 22:20 UTC · reviewed

Magnitude
2.1micro
local magnitude (Richter) (ml)
Depth
30.8 km
Status
Reviewed
Origin time
2026-10-17 19:20:30 UTC
Local: 17 Oct 2026, 09:20:30 (Pacific/Honolulu)
Epicentre
19.024° N, 155.400° 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. 11,40477 kmINot felt
HiloHawaii, United States · pop. 43,26385 kmINot felt
HonoluluHawaii, United States · pop. 350,964361 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 · HV, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey2.1 mlwas 2.130.8 km19.02° N, 155.40° 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 31 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

185 later earthquakes within 30 km; the largest was M3.3 20 days ago. 55 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.051.10
3.571.831
18.311.829
23.141.930
26.001.94
34.321.830
42.011.833
44.211.731
50.691.931
57.412.337
59.841.930
66.201.828
66.381.931
69.182.834
90.831.234
110.231.632
110.281.829
110.832.132
111.361.829
113.891.933
114.121.935
114.481.935
114.671.835
117.621.735
118.961.733
122.921.830
129.181.75
130.381.840
132.491.831
137.572.030
138.932.229
140.533.329
142.092.032
144.441.428
146.441.9-1
147.951.830
152.121.86
152.151.97
157.101.949
172.751.936
172.871.940
174.031.99
174.852.133
175.691.928
178.721.847
178.962.132
191.441.830
196.351.740
197.951.931
199.751.731
201.941.832
210.202.129
217.441.828
219.501.829
223.101.830
224.431.831
232.271.732
236.172.133
237.081.931
238.661.731
239.492.530
242.451.733
244.581.230
251.721.729
251.721.833
256.701.817
257.511.233
259.811.828
260.661.829
273.061.832
273.112.026
274.091.831
275.881.929
284.092.232
285.831.830
293.951.930
297.532.733
308.001.830
308.801.930
309.461.832
311.381.838
312.611.928
312.691.332
314.251.730
316.791.832
318.132.132
321.631.830
324.701.931
324.712.00
325.991.79
326.041.930
327.491.932
327.551.829
327.741.430
327.841.934
328.491.636
328.542.130
343.661.846
343.672.052
347.191.932
347.331.930
349.432.432
349.731.728
350.281.828
356.241.913
358.611.827
358.971.829
361.671.829
365.651.331
377.481.829
380.331.831
380.361.732
389.211.927
392.541.726
402.201.829
405.481.731
417.051.729
417.371.931
421.791.329
427.861.828
430.272.036
439.332.132
441.111.933
441.281.829
448.021.731
450.771.830
456.701.739
458.701.732
468.211.529
468.331.830
468.871.733
474.522.028
480.191.729
492.241.830
497.701.917
497.991.930
498.741.93
500.481.928
500.961.730
503.211.929
505.741.329
507.081.930
507.351.928
510.161.933
514.231.842
521.311.911
521.911.937
525.521.831
526.201.929
528.432.435
530.731.932
537.671.736
537.681.935
537.692.344
537.962.040
538.262.612
538.461.713
544.312.531
544.372.231
544.421.834
553.371.929
558.492.629
559.961.929
563.661.930
567.582.131
568.711.736
569.141.829
569.531.931
573.801.732
574.371.829
577.731.827
577.841.930
588.041.530
589.721.727
590.511.727
605.041.929
609.171.731
613.401.931
617.492.628
620.771.828
622.301.928
622.611.736
623.432.129
623.942.629
625.511.729
  1. 3.369 km SE of Hōlualoa, Hawaii, United States10-23 15:52
  2. 2.875 km SW of Hawaiian Paradise Park, United States10-20 16:31
  3. 2.771 km SW of Hawaiian Paradise Park, United States10-30 04:52
  4. 2.667 km SE of Hōlualoa, Hawaii, United States11-12 19:17
  5. 2.691 km SSW of Hawaiian Paradise Park, United States11-12 12:50
  6. 2.672 km SE of Hōlualoa, Hawaii, United States11-09 05:36
  7. 2.661 km SW of Hawaiian Paradise Park, United States11-10 01:49
  8. 2.566 km SE of Hōlualoa, Hawaii, United States10-27 18:50
  9. 2.567 km SE of Hōlualoa, Hawaii, United States11-09 11:39
  10. 2.498 km SSE of Hōlualoa, Hawaii, United States11-08 19:46
  11. 2.468 km SE of Hōlualoa, Hawaii, United States11-01 08:46
  12. 2.374 km SW of Hawaiian Paradise Park, United States10-20 04:45
  13. 2.368 km SE of Hōlualoa, Hawaii, United States11-09 05:01
  14. 2.270 km SE of Hōlualoa, Hawaii, United States10-23 14:16
  15. 2.268 km SE of Hōlualoa, Hawaii, United States10-29 15:25
  16. 2.267 km SE of Hōlualoa, Hawaii, United States11-09 11:42
  17. 2.168 km SE of Hōlualoa, Hawaii, United States10-27 15:30
  18. 2.169 km SE of Hōlualoa, Hawaii, United States10-25 02:11
  19. 2.167 km SE of Hōlualoa, Hawaii, United States10-31 01:28
  20. 2.158 km SW of Hawaiian Paradise Park, United States11-12 18:46
  21. 2.174 km SW of Hawaiian Paradise Park, United States11-10 10:55
  22. 2.168 km SE of Hōlualoa, Hawaii, United States10-26 13:32
  23. 2.170 km SW of Hawaiian Paradise Park, United States11-05 02:40
  24. 2.168 km SE of Hōlualoa, Hawaii, United States10-25 06:17
  25. 2.169 km SE of Hōlualoa, Hawaii, United States10-22 10:10

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Event id hv75059766. First recorded here 17 Oct 2026, 19:25:00 UTC. Solutions: USGS · HV (usgs:hv75059766). Cite as: SeismoAtlas, “M2.1 earthquake 77 km SW of Hawaiian Paradise Park, United States”, https://seismoatlas.com/earthquake/hv75059766-m2-1-earthquake-77-km-sw-of-hawaiian-paradise-park-united-states, data from USGS.

JSON: /api/v1/events/hv75059766. SeismoAtlas is not an official warning service.