M2.2 earthquake 41 km SE of Hōlualoa, Hawaii, United States
A magnitude 2.2 earthquake struck 41 km SE of Hōlualoa, Hawaii, United States at 22:59 local time (08:59 UTC) on 29 Sept 2026, at a depth of -1 km, according to USGS.
revised from M2.6
Data: USGS · updated 2026-09-30 20:05 UTC · reviewed
- Magnitude
- 2.2micro
local magnitude (Richter) (ml)
revised from 2.6 - Depth
- -1 km
- Status
- Reviewed
- Origin time
- 2026-09-30 08:59:57 UTC
- Local: 29 Sept 2026, 22:59:57 (Pacific/Honolulu)
- Epicentre
- 19.412° N, 155.627° 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
| Place | Distance | Est. shaking |
|---|---|---|
| HōlualoaHawaii, United States · pop. 8,538 | 41 km | INot felt |
| Kailua-KonaHawaii, United States · pop. 11,975 | 47 km | INot felt |
| HiloHawaii, United States · pop. 43,263 | 66 km | INot felt |
| HonoluluHawaii, United States · pop. 350,964 | 314 km | INot 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.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey | 2.2 mlwas 2.6 | -1 km | 19.41° N, 155.63° W | – | Reviewed · 1 revision |
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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 35 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 -1 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 36× the energy of M1.2, and its waves are about 11× taller on a seismogram. Energy: 35 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
17 later earthquakes within 30 km; the largest was M2.6 3 days ago. 27 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M2.2
17 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 6.04 | 2.6 | 31 |
| 7.53 | 2.4 | 12 |
| 12.31 | 1.6 | 6 |
| 17.05 | 1.8 | 6 |
| 25.12 | 1.8 | 30 |
| 28.61 | 2.5 | 30 |
| 30.91 | 1.9 | 33 |
| 35.47 | 2.1 | 7 |
| 40.53 | 1.9 | 27 |
| 41.45 | 1.9 | 30 |
| 56.06 | 1.9 | 32 |
| 60.44 | 1.8 | 34 |
| 60.78 | 1.7 | 31 |
| 66.01 | 1.8 | 0 |
| 69.03 | 1.8 | 31 |
| 74.34 | 2.1 | 31 |
| 77.36 | 1.8 | 30 |
- 2.655 km SW of Hawaiian Paradise Park, United States09-30 15:02
- 2.568 km SE of Hōlualoa, Hawaii, United States10-01 13:36
- 2.424 km SSE of Hōlualoa, Hawaii, United States09-30 16:31
- 2.167 km SE of Hōlualoa, Hawaii, United States10-03 11:20
- 2.120 km SE of Hōlualoa, Hawaii, United States10-01 20:28
- 1.967 km SE of Hōlualoa, Hawaii, United States10-02 17:03
- 1.966 km SE of Hōlualoa, Hawaii, United States10-01 15:54
- 1.967 km SE of Hōlualoa, Hawaii, United States10-02 01:31
- 1.968 km SE of Hōlualoa, Hawaii, United States10-02 02:27
- 1.858 km SSE of Hōlualoa, Hawaii, United States10-01 02:03
- 1.869 km SE of Hōlualoa, Hawaii, United States10-03 14:21
- 1.869 km SE of Hōlualoa, Hawaii, United States10-02 21:26
- 1.861 km SE of Hōlualoa, Hawaii, United States10-03 06:02
- 1.868 km SE of Hōlualoa, Hawaii, United States10-01 10:07
- 1.865 km SW of Hawaiian Paradise Park, United States10-03 03:00
- 1.757 km SW of Hawaiian Paradise Park, United States10-02 21:46
- 1.657 km ESE of Hōlualoa, Hawaii, United States09-30 21:18
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
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Event id hv75045792. First recorded here 30 Sept 2026, 09:04:33 UTC. Solutions: USGS · HV (usgs:hv75045792). Cite as: SeismoAtlas, “M2.2 earthquake 41 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75045792-m2-2-earthquake-41-km-se-of-holualoa-hawaii-united-states, data from USGS.
JSON: /api/v1/events/hv75045792. SeismoAtlas is not an official warning service.