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M2.2 earthquake 42 km ESE of Hōlualoa, Hawaii, United States

A magnitude 2.2 earthquake struck 42 km ESE of Hōlualoa, Hawaii, United States at 22:06 local time (08:06 UTC) on 29 Sept 2026, at a depth of -3 km, according to USGS.

Data: USGS · updated 2026-09-30 19:45 UTC · reviewed

Magnitude
2.2micro
local magnitude (Richter) (ml)
Depth
-3.3 km
Status
Reviewed
Origin time
2026-09-30 08:06:07 UTC
Local: 29 Sept 2026, 22:06:07 (Pacific/Honolulu)
Epicentre
19.420° N, 155.615° W

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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. 8,53842 kmINot felt
Kailua-KonaHawaii, United States · pop. 11,97547 kmINot felt
HiloHawaii, United States · pop. 43,26365 kmINot felt
HonoluluHawaii, United States · pop. 350,964315 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. Likely felt out to about 7 km.

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 Survey2.2 ml-3.3 km19.42° N, 155.62° 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 28 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 -3 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.2 releases about 30× the energy of M1.2, and its waves are about 9.5× taller on a seismogram. Energy: 28 kg of TNT vs 951 g of TNT.

Each square is the energy of one M1.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

18 later earthquakes within 30 km; the largest was M2.6 3 days ago. 25 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.902.2-1
6.942.631
8.432.412
13.201.66
17.951.86
26.021.830
29.512.530
31.801.933
36.372.17
41.431.927
42.351.930
56.951.932
57.341.929
61.331.834
61.681.731
66.911.80
69.931.831
75.232.131
  1. 2.655 km SW of Hawaiian Paradise Park, United States09-30 15:02
  2. 2.568 km SE of Hōlualoa, Hawaii, United States10-01 13:36
  3. 2.424 km SSE of Hōlualoa, Hawaii, United States09-30 16:31
  4. 2.241 km SE of Hōlualoa, Hawaii, United States09-30 08:59
  5. 2.167 km SE of Hōlualoa, Hawaii, United States10-03 11:20
  6. 2.120 km SE of Hōlualoa, Hawaii, United States10-01 20:28
  7. 1.967 km SE of Hōlualoa, Hawaii, United States10-02 17:03
  8. 1.966 km SE of Hōlualoa, Hawaii, United States10-01 15:54
  9. 1.967 km SE of Hōlualoa, Hawaii, United States10-02 01:31
  10. 1.968 km SE of Hōlualoa, Hawaii, United States10-02 02:27
  11. 1.957 km SW of Hawaiian Paradise Park, United States10-02 17:26
  12. 1.858 km SSE of Hōlualoa, Hawaii, United States10-01 02:03
  13. 1.869 km SE of Hōlualoa, Hawaii, United States10-02 21:26
  14. 1.861 km SE of Hōlualoa, Hawaii, United States10-03 06:02
  15. 1.868 km SE of Hōlualoa, Hawaii, United States10-01 10:07
  16. 1.865 km SW of Hawaiian Paradise Park, United States10-03 03:00
  17. 1.757 km SW of Hawaiian Paradise Park, United States10-02 21:46
  18. 1.657 km ESE of Hōlualoa, Hawaii, United States09-30 21:18

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Reports on SeismoAtlas

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Event id hv75045777. First recorded here 30 Sept 2026, 19:47:38 UTC. Solutions: USGS · HV (usgs:hv75045777). Cite as: SeismoAtlas, “M2.2 earthquake 42 km ESE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75045777-m2-2-earthquake-42-km-ese-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75045777. SeismoAtlas is not an official warning service.