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M2.6 earthquake 71 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.6 earthquake struck 71 km SE of Hōlualoa, Hawaii, United States at 03:27 local time (13:27 UTC) on 23 Sept 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-23 20:52 UTC · reviewed

Magnitude
2.6micro
local magnitude (Richter) (ml)
Depth
10.5 km
Status
Reviewed
Origin time
2026-09-23 13:27:40 UTC
Local: 23 Sept 2026, 03:27:40 (Pacific/Honolulu)
Epicentre
19.162° N, 155.485° 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. 11,40472 kmINot felt
HiloHawaii, United States · pop. 43,26376 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 Survey2.6 ml10.5 km19.16° N, 155.48° W–Reviewed

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How big was it?

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

It released roughly the energy of 108 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.6 releases about 29× the energy of M1.6, and its waves are about 9.3× taller on a seismogram. Energy: 108 kg of TNT vs 4 kg of TNT.

Each square is the energy of one M1.6. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

57 later earthquakes within 30 km; the largest was M2.8 11 h ago. 24 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.911.810
3.381.629
3.481.726
3.502.033
3.971.728
4.131.829
4.141.728
6.191.830
8.351.632
9.411.928
9.661.932
10.802.232
11.271.630
13.232.133
13.381.830
16.291.533
19.331.836
26.061.831
29.992.129
33.082.05
33.161.731
33.511.232
36.441.79
36.741.830
39.401.927
40.601.830
43.511.935
43.971.730
44.312.228
45.761.612
60.781.610
61.892.131
65.102.328
73.971.930
74.582.08
75.862.430
78.222.136
78.242.632
83.122.031
92.201.930
92.701.827
100.511.910
103.201.928
106.901.729
108.902.129
114.161.727
116.882.132
117.151.732
118.132.835
118.182.133
118.492.433
118.911.830
119.062.134
119.292.333
119.441.732
119.992.333
128.822.532
  1. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  2. 2.652 km SW of Hawaiian Paradise Park, United States09-26 19:41
  3. 2.570 km SW of Hawaiian Paradise Park, United States09-28 22:17
  4. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  5. 2.457 km SW of Hawaiian Paradise Park, United States09-26 17:19
  6. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  7. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  8. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  9. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  10. 2.276 km SW of Hawaiian Paradise Park, United States09-24 00:15
  11. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  12. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  13. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  14. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  15. 2.167 km SW of Hawaiian Paradise Park, United States09-26 03:21
  16. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  17. 2.171 km SE of Hōlualoa, Hawaii, United States09-24 02:41
  18. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  19. 2.052 km SW of Hawaiian Paradise Park, United States09-24 22:32
  20. 2.069 km SE of Hōlualoa, Hawaii, United States09-23 16:57
  21. 2.057 km ESE of Hōlualoa, Hawaii, United States09-26 16:02
  22. 2.067 km SE of Hōlualoa, Hawaii, United States09-27 00:34
  23. 1.967 km SE of Hōlualoa, Hawaii, United States09-23 22:52
  24. 1.969 km SE of Hōlualoa, Hawaii, United States09-23 23:07
  25. 1.959 km ESE of Hōlualoa, Hawaii, United States09-27 17:58

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Reports on SeismoAtlas

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Event id hv75042652. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75042652). Cite as: SeismoAtlas, “M2.6 earthquake 71 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75042652-m2-6-earthquake-71-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75042652. SeismoAtlas is not an official warning service.