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SeismoAtlas

M2.1 earthquake 71 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.1 earthquake struck 71 km SE of Hōlualoa, Hawaii, United States at 16:41 local time (02:41 UTC) on 23 Sept 2026, at a depth of 33 km, according to USGS.

Data: USGS · updated 2026-09-24 18:53 UTC · reviewed

Magnitude
2.1micro
local magnitude (Richter) (ml)
Depth
32.8 km
Status
Reviewed
Origin time
2026-09-24 02:41:28 UTC
Local: 23 Sept 2026, 16:41:28 (Pacific/Honolulu)
Epicentre
19.146° N, 155.503° 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
HōlualoaHawaii, United States · pop. 8,53871 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40475 kmINot felt
HiloHawaii, United States · pop. 43,26378 kmINot felt
HonoluluHawaii, United States · pop. 350,964344 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 ml32.8 km19.15° N, 155.50° W–Reviewed

How big was it?

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

It released roughly the energy of 19 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 33 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 29× the energy of M1.1, and its waves are about 9.3× taller on a seismogram. Energy: 19 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

232 later earthquakes within 30 km; the largest was M3.3 20 days ago. 37 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.151.830
3.061.533
6.101.836
12.831.831
16.762.129
19.852.05
19.931.731
20.281.232
23.511.830
26.171.927
27.371.830
30.281.935
30.741.730
31.082.228
32.531.612
47.551.610
48.661.831
51.871.729
60.741.930
61.352.08
62.631.830
64.992.136
65.012.636
69.892.031
78.971.930
79.471.827
87.281.910
89.971.928
93.671.729
95.672.130
100.931.727
103.651.334
103.921.732
104.902.835
104.951.535
105.261.935
105.681.830
105.832.134
106.061.835
106.211.732
106.761.735
115.592.332
116.721.833
116.772.037
119.481.833
126.001.932
128.121.827
130.971.733
140.581.726
141.111.96
142.011.931
143.971.728
156.352.631
162.621.66
167.361.86
171.661.727
175.431.830
178.922.530
179.922.041
181.211.933
181.561.431
186.661.932
187.801.930
190.241.832
190.841.927
191.761.930
192.442.339
194.601.934
202.941.815
206.231.832
206.361.932
206.751.929
208.741.529
210.661.730
210.741.834
211.091.731
212.991.729
216.321.80
219.341.831
224.641.533
227.671.830
231.092.127
232.781.832
240.421.732
242.571.829
243.421.633
243.451.610
251.011.728
251.321.829
254.311.829
256.151.931
259.241.727
264.691.632
270.331.910
271.671.830
273.581.830
288.191.843
301.191.19
301.201.929
306.141.934
306.771.827
307.761.633
311.151.832
311.241.833
318.181.829
319.371.68
321.871.831
331.611.732
332.371.933
340.141.827
342.462.261
348.281.948
348.361.950
348.441.82
353.581.928
353.892.032
356.121.727
356.201.829
359.791.927
386.341.732
388.801.631
389.811.133
394.391.731
395.451.928
399.271.828
410.111.828
426.781.928
429.601.830
436.621.833
436.761.811
439.011.740
439.991.730
445.881.830
446.331.931
449.671.631
450.251.733
454.131.440
458.331.734
460.681.829
466.132.049
467.271.927
467.791.734
468.691.733
471.171.832
472.571.930
473.111.635
473.831.934
475.032.034
476.651.934
477.912.232
478.431.930
486.012.027
492.501.930
495.101.428
495.231.728
495.341.933
497.011.737
503.482.227
503.501.729
507.922.433
513.671.935
522.841.735
523.541.835
525.051.845
529.481.828
531.661.829
532.331.830
533.082.10
535.571.831
537.271.89
542.811.833
547.161.434
549.341.77
549.992.134
551.771.70
552.562.031
556.102.132
559.011.431
559.431.729
559.711.129
560.701.728
561.871.89
563.851.50
565.301.433
567.741.914
568.652.131
568.701.10
572.221.831
582.241.729
586.961.829
591.791.930
593.643.0-1
601.441.929
602.971.830
604.551.99
610.661.833
612.861.731
618.951.38
619.341.931
626.062.337
628.491.930
629.581.929
634.851.828
635.031.931
637.832.834
649.641.730
659.481.234
666.241.929
678.881.632
678.931.829
679.482.132
680.011.829
682.541.933
682.771.935
683.131.935
683.321.835
686.271.735
687.611.733
691.571.830
697.831.75
699.031.840
701.141.831
706.232.030
707.582.229
708.131.829
709.183.329
710.742.032
711.041.631
711.141.130
713.091.428
715.091.9-1
716.601.830
  1. 3.369 km SE of Hōlualoa, Hawaii, United States10-23 15:52
  2. 3.056 km SSE of Hōlualoa, Hawaii, United States10-18 20:19
  3. 2.875 km SW of Hawaiian Paradise Park, United States10-20 16:31
  4. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  5. 2.655 km SW of Hawaiian Paradise Park, United States09-30 15:02
  6. 2.655 km SW of Hawaiian Paradise Park, United States09-26 19:41
  7. 2.568 km SE of Hōlualoa, Hawaii, United States10-01 13:36
  8. 2.469 km SE of Hōlualoa, Hawaii, United States10-15 06:36
  9. 2.368 km SW of Hawaiian Paradise Park, United States09-28 22:17
  10. 2.373 km SSE of Hōlualoa, Hawaii, United States10-02 03:08
  11. 2.374 km SW of Hawaiian Paradise Park, United States10-20 04:45
  12. 2.261 km SSE of Hōlualoa, Hawaii, United States10-08 09:08
  13. 2.270 km SE of Hōlualoa, Hawaii, United States10-23 14:16
  14. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  15. 2.266 km SW of Hawaiian Paradise Park, United States10-14 00:36
  16. 2.264 km SW of Hawaiian Paradise Park, United States10-15 02:10
  17. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  18. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  19. 2.173 km SW of Hawaiian Paradise Park, United States10-03 17:47
  20. 2.169 km SE of Hōlualoa, Hawaii, United States10-17 00:40
  21. 2.177 km SW of Hawaiian Paradise Park, United States10-17 19:20
  22. 2.167 km SE of Hōlualoa, Hawaii, United States10-17 06:47
  23. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  24. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  25. 2.167 km SE of Hōlualoa, Hawaii, United States10-16 07:46

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Reports on SeismoAtlas

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Event id hv75043012. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · HV (usgs:hv75043012). Cite as: SeismoAtlas, “M2.1 earthquake 71 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043012-m2-1-earthquake-71-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75043012. SeismoAtlas is not an official warning service.