M1.9 earthquake 68 km SE of Hōlualoa, Hawaii, United States
A magnitude 1.9 earthquake struck 68 km SE of Hōlualoa, Hawaii, United States at 16:27 local time (02:27 UTC) on 1 Oct 2026, at a depth of 30 km, according to USGS. The solution is preliminary and may be revised.
Data: USGS · updated 2026-10-02 02:30 UTC · automatic solution
- Magnitude
- 1.9micro
duration magnitude (md) - Depth
- 30.4 km
- Status
- Automatic
- Origin time
- 2026-10-02 02:27:05 UTC
- Local: 1 Oct 2026, 16:27:05 (Pacific/Honolulu)
- Epicentre
- 19.172° N, 155.512° 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 | 68 km | INot felt |
| Kailua-KonaHawaii, United States · pop. 11,975 | 73 km | INot felt |
| HiloHawaii, United States · pop. 43,263 | 76 km | INot felt |
| HonoluluHawaii, United States · pop. 350,964 | 341 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.
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.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey | 1.9 md | 30.4 km | 19.17° N, 155.51° W | – | Automatic |
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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 10 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.
M1.9 releases about 21× the energy of M1.0, and its waves are about 7.6× taller on a seismogram. Energy: 10 kg of TNT vs 477 g of TNT.
Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
17 later earthquakes within 30 km; the largest was M2.3 1 day ago. 58 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.9
17 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 0.68 | 2.3 | 39 |
| 2.84 | 1.9 | 34 |
| 11.18 | 1.8 | 15 |
| 14.47 | 1.8 | 32 |
| 14.60 | 1.9 | 32 |
| 14.99 | 1.9 | 29 |
| 16.98 | 1.5 | 29 |
| 18.90 | 1.7 | 30 |
| 18.98 | 1.8 | 34 |
| 19.33 | 1.7 | 31 |
| 21.23 | 1.9 | 29 |
| 24.56 | 1.8 | 0 |
| 27.58 | 1.8 | 31 |
| 32.88 | 2.1 | 31 |
| 35.90 | 1.8 | 30 |
| 39.33 | 1.9 | 26 |
| 41.02 | 1.8 | 32 |
- 2.373 km SSE of Hōlualoa, Hawaii, United States10-02 03:08
- 2.167 km SE of Hōlualoa, Hawaii, United States10-03 11:20
- 1.967 km SE of Hōlualoa, Hawaii, United States10-02 17:03
- 1.972 km SW of Hawaiian Paradise Park, United States10-02 23:40
- 1.973 km SW of Hawaiian Paradise Park, United States10-03 17:47
- 1.976 km SSW of Hawaiian Paradise Park, United States10-02 05:17
- 1.957 km SW of Hawaiian Paradise Park, United States10-02 17:26
- 1.864 km SW of Hawaiian Paradise Park, United States10-03 19:28
- 1.877 km SSW of Hawaiian Paradise Park, United States10-02 13:37
- 1.869 km SE of Hōlualoa, Hawaii, United States10-03 14:21
- 1.871 km SE of Hōlualoa, Hawaii, United States10-02 16:55
- 1.869 km SE of Hōlualoa, Hawaii, United States10-02 21:26
- 1.861 km SE of Hōlualoa, Hawaii, United States10-03 06:02
- 1.865 km SW of Hawaiian Paradise Park, United States10-03 03:00
- 1.757 km SW of Hawaiian Paradise Park, United States10-02 21:46
- 1.761 km SW of Hawaiian Paradise Park, United States10-02 21:20
- 1.565 km SW of Hawaiian Paradise Park, United States10-02 19:25
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 hv75047692. First recorded here 2 Oct 2026, 02:31:16 UTC. Solutions: USGS · HV (usgs:hv75047692). Cite as: SeismoAtlas, “M1.9 earthquake 68 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75047692-m1-9-earthquake-68-km-se-of-holualoa-hawaii-united-states, data from USGS.
JSON: /api/v1/events/hv75047692. SeismoAtlas is not an official warning service.