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M2.6 earthquake 67 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.6 earthquake struck 67 km SE of Hōlualoa, Hawaii, United States at 04:06 local time (14:06 UTC) on 21 Sept 2026, at a depth of 31 km, according to USGS.

Data: USGS · updated 2026-09-23 02:31 UTC · reviewed

Magnitude
2.6micro
local magnitude (Richter) (ml)
Depth
30.7 km
Status
Reviewed
Origin time
2026-09-21 14:06:04 UTC
Local: 21 Sept 2026, 04:06:04 (Pacific/Honolulu)
Epicentre
19.197° N, 155.495° 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. 8,53867 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40470 kmINot felt
HiloHawaii, United States · pop. 43,26373 kmINot felt
HonoluluHawaii, United States · pop. 350,964341 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 ml30.7 km19.20° N, 155.49° W–Reviewed

How big was it?

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

It released roughly the energy of 128 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.

M2.6 releases about 34× the energy of M1.6, and its waves are about 10× taller on a seismogram. Energy: 128 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

75 later earthquakes within 30 km; the largest was M2.8 9 h ago. 6 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.401.830
4.872.631
11.551.831
12.061.933
13.751.728
15.881.831
19.001.228
20.271.839
23.091.729
28.252.131
28.532.032
29.411.928
32.211.930
40.071.928
43.251.811
44.491.928
44.552.031
45.581.629
47.362.610
48.271.810
50.741.629
50.841.726
50.862.033
51.331.728
51.491.829
51.501.728
53.551.830
55.711.632
56.771.928
57.021.932
58.162.232
58.631.630
60.592.133
60.741.830
63.651.533
66.701.836
73.421.831
77.352.129
80.442.05
80.521.731
80.871.232
83.801.79
84.101.830
86.761.927
87.961.830
90.871.935
91.331.730
91.672.228
93.121.612
108.141.610
109.252.131
112.462.328
121.331.930
121.942.08
123.222.430
125.582.136
125.602.632
130.482.031
139.561.930
140.061.827
147.871.910
150.561.928
154.261.729
156.262.129
161.521.727
164.242.132
164.511.732
165.492.835
165.542.133
165.852.433
166.271.830
166.422.134
166.652.333
166.801.732
167.352.333
  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. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 18:58
  4. 2.671 km SE of Hōlualoa, Hawaii, United States09-23 13:27
  5. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  6. 2.457 km SW of Hawaiian Paradise Park, United States09-26 17:19
  7. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  8. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  9. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  10. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  11. 2.276 km SW of Hawaiian Paradise Park, United States09-24 00:15
  12. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  13. 2.170 km SE of Hōlualoa, Hawaii, United States09-22 18:21
  14. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  15. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  16. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  17. 2.167 km SW of Hawaiian Paradise Park, United States09-26 03:21
  18. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  19. 2.171 km SE of Hōlualoa, Hawaii, United States09-24 02:41
  20. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  21. 2.067 km SE of Hōlualoa, Hawaii, United States09-23 10:38
  22. 2.052 km SW of Hawaiian Paradise Park, United States09-24 22:32
  23. 2.069 km SE of Hōlualoa, Hawaii, United States09-23 16:57
  24. 2.057 km ESE of Hōlualoa, Hawaii, United States09-26 16:02
  25. 2.070 km SE of Hōlualoa, Hawaii, United States09-22 18:37

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Reports on SeismoAtlas

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Event id hv75041242. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75041242). Cite as: SeismoAtlas, “M2.6 earthquake 67 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75041242-m2-6-earthquake-67-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75041242. SeismoAtlas is not an official warning service.