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M2.5 earthquake 66 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.5 earthquake struck 66 km SE of Hōlualoa, Hawaii, United States at 23:04 local time (09:04 UTC) on 7 Sept 2026, at a depth of 30 km, according to USGS.

Data: USGS · updated 2026-09-08 18:48 UTC · reviewed

Magnitude
2.5micro
local magnitude (Richter) (ml)
Depth
30.3 km
Status
Reviewed
Origin time
2026-09-08 09:04:24 UTC
Local: 7 Sept 2026, 23:04:24 (Pacific/Honolulu)
Epicentre
19.206° N, 155.501° 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. 8,53866 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40470 kmINot felt
HiloHawaii, United States · pop. 43,26372 kmINot felt
HonoluluHawaii, United States · pop. 350,964339 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 Survey2.5 ml30.3 km19.21° N, 155.50° 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 74 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 30 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.5 releases about 28× the energy of M1.5, and its waves are about 9.1× taller on a seismogram. Energy: 74 kg of TNT vs 3 kg of TNT.

Each square is the energy of one M1.5. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

87 later earthquakes within 30 km; the largest was M4.1 10 days ago. 7 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
32.312.632
78.902.631
128.934.013
129.272.611
169.702.632
237.544.112
240.362.510
242.263.014
258.402.814
270.342.612
317.032.631
321.421.830
321.902.631
328.571.831
329.081.933
330.781.728
332.901.831
336.031.228
337.301.839
340.111.729
345.282.131
345.552.032
346.441.928
349.231.930
357.101.928
360.281.811
361.521.928
361.582.031
362.611.629
364.392.610
365.301.810
367.771.629
367.861.726
367.892.033
368.361.728
368.511.829
368.531.728
370.581.830
372.741.632
373.801.928
374.051.932
375.192.232
375.661.630
377.622.133
377.761.830
380.681.533
383.721.836
390.451.831
394.382.129
397.472.05
397.541.731
397.901.232
400.831.79
401.121.830
403.791.927
404.991.830
407.901.935
408.361.730
408.702.228
410.151.612
425.161.610
426.282.131
429.492.328
438.361.930
438.972.08
440.252.430
442.612.136
442.622.632
447.512.031
456.591.930
457.091.827
464.891.910
467.591.928
471.291.729
473.282.129
478.551.727
481.262.132
481.531.732
482.522.835
482.572.133
482.882.433
483.291.830
483.452.134
483.682.333
483.831.732
484.382.333
493.212.532
  1. 4.171 km SE of Hōlualoa, Hawaii, United States09-18 06:36
  2. 4.071 km SE of Hōlualoa, Hawaii, United States09-13 18:00
  3. 3.070 km SE of Hōlualoa, Hawaii, United States09-18 11:19
  4. 2.870 km SE of Hōlualoa, Hawaii, United States09-19 03:28
  5. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  6. 2.670 km SE of Hōlualoa, Hawaii, United States09-13 18:20
  7. 2.674 km SW of Hawaiian Paradise Park, United States09-09 17:23
  8. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 14:06
  9. 2.667 km SE of Hōlualoa, Hawaii, United States09-15 10:46
  10. 2.652 km SW of Hawaiian Paradise Park, United States09-26 19:41
  11. 2.661 km SW of Hawaiian Paradise Park, United States09-11 15:58
  12. 2.671 km SE of Hōlualoa, Hawaii, United States09-19 15:24
  13. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 18:58
  14. 2.671 km SE of Hōlualoa, Hawaii, United States09-23 13:27
  15. 2.570 km SW of Hawaiian Paradise Park, United States09-28 22:17
  16. 2.570 km SE of Hōlualoa, Hawaii, United States09-18 09:26
  17. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  18. 2.457 km SW of Hawaiian Paradise Park, United States09-26 17:19
  19. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  20. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  21. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  22. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  23. 2.276 km SW of Hawaiian Paradise Park, United States09-24 00:15
  24. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  25. 2.170 km SE of Hōlualoa, Hawaii, United States09-22 18:21

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

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Reports on SeismoAtlas

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Event id hv75030812. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · HV (usgs:hv75030812). Cite as: SeismoAtlas, “M2.5 earthquake 66 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75030812-m2-5-earthquake-66-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75030812. SeismoAtlas is not an official warning service.