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SeismoAtlas

M3.3 earthquake 70 km SE of Hōlualoa, Hawaii, United States

A magnitude 3.3 earthquake struck 70 km SE of Hōlualoa, Hawaii, United States at 05:01 local time (15:01 UTC) on 4 Sept 2026, at a depth of 33 km, according to USGS.

2 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-13 20:15 UTC · reviewed

Magnitude
3.3minor
local magnitude (Richter) (ml)
Depth
32.9 km
Status
Reviewed
Origin time
2026-09-04 15:01:26 UTC
Local: 4 Sept 2026, 05:01:26 (Pacific/Honolulu)
Epicentre
19.148° N, 155.502° 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. 8,53870 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40474 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 Survey3.3 ml32.9 km19.15° N, 155.50° W–Reviewed

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 1.3 t 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.

M3.3 releases about 30× the energy of M2.3, and its waves are about 9.5× taller on a seismogram. Energy: 1.3 t of TNT vs 43 kg of TNT.

Each square is the energy of one M2.3. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

85 later earthquakes within 30 km; the largest was M4.1 10 days ago. 8 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
90.052.530
122.362.632
168.952.631
218.984.013
219.322.611
259.752.632
327.594.112
330.412.510
332.313.014
348.452.814
360.392.612
407.082.631
411.471.830
411.952.631
418.621.831
419.131.933
420.831.728
422.951.831
426.081.228
427.341.839
430.161.729
435.332.131
435.602.032
436.481.928
439.281.930
447.151.928
450.321.811
451.571.928
451.622.031
454.442.610
455.351.810
457.821.629
457.911.726
457.942.033
458.411.728
458.561.829
458.581.728
460.631.830
462.791.632
463.851.928
464.101.932
465.242.232
465.701.630
467.672.133
467.811.830
470.731.533
473.771.836
480.501.831
484.432.129
487.522.05
487.591.731
487.951.232
491.171.830
493.841.927
495.041.830
497.951.935
498.411.730
498.752.228
500.201.612
515.211.610
516.332.131
519.542.328
528.411.930
529.022.08
530.302.430
532.662.136
532.672.632
537.552.031
546.641.930
547.141.827
554.941.910
557.641.928
561.341.729
563.332.129
568.601.727
571.312.132
571.581.732
572.572.835
572.622.133
572.932.433
573.341.830
573.502.134
573.732.333
573.881.732
574.432.333
  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 SE of Hōlualoa, Hawaii, United States09-18 09:26
  16. 2.566 km SE of Hōlualoa, Hawaii, United States09-08 09:04
  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.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 2 reports: add yours at USGS.

Event id hv75029287. First recorded here 28 Sept 2026, 17:32:13 UTC. Solutions: USGS · HV (usgs:hv75029287). Cite as: SeismoAtlas, “M3.3 earthquake 70 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75029287-m3-3-earthquake-70-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75029287. SeismoAtlas is not an official warning service.