M2.9 earthquake 19 km ENE of Kalaoa, Hawaii, United States
A magnitude 2.9 earthquake struck 19 km ENE of Kalaoa, Hawaii, United States at 15:49 local time (01:49 UTC) on 18 Oct 2026, at a depth of 13 km, according to USGS.
revised from M2.8
Data: USGS · updated 2026-10-19 17:39 UTC · reviewed
- Magnitude
- 2.9micro
local magnitude (Richter) (ml)
revised from 2.8 - Depth
- 12.8 km
- Status
- Reviewed
- Origin time
- 2026-10-19 01:49:08 UTC
- Local: 18 Oct 2026, 15:49:08 (Pacific/Honolulu)
- Epicentre
- 19.824° N, 155.829° 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
| Place | Distance | Est. shaking |
|---|---|---|
| KalaoaHawaii, United States · pop. 9,644 | 19 km | IIWeak |
| HōlualoaHawaii, United States · pop. 8,538 | 26 km | INot felt |
| HiloHawaii, United States · pop. 43,263 | 78 km | INot felt |
| KīheiHawaii, United States · pop. 20,881 | 123 km | INot felt |
| KahuluiHawaii, United States · pop. 26,337 | 136 km | INot felt |
| HonoluluHawaii, United States · pop. 350,964 | 268 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 5 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 | 2.9 mlwas 2.8 | 12.8 km | 19.82° N, 155.83° W | – | Reviewed · 1 revision |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 304 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 13 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M2.9 releases about 29× the energy of M1.9, and its waves are about 9.3× taller on a seismogram. Energy: 304 kg of TNT vs 11 kg of TNT.
Each square is the energy of one M1.9. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
7 later earthquakes within 30 km; the largest was M2.9 6 days ago. 1 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M2.9
7 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 206.10 | 2.1 | 6 |
| 213.08 | 1.7 | 22 |
| 220.44 | 1.9 | 38 |
| 339.92 | 1.9 | 35 |
| 384.89 | 1.1 | 12 |
| 452.33 | 2.9 | 14 |
| 538.86 | 2.6 | 4 |
- 2.95 km NE of Kalaoa, Hawaii, United States11-06 22:08
- 2.615 km W of Waimea, Hawaii, United States11-10 12:41
- 2.111 km WNW of Kalaoa, Hawaii, United States10-27 15:55
- 1.921 km S of Waimea, Hawaii, United States10-28 06:15
- 1.9Near Hōlualoa, Hawaii, United States11-02 05:44
- 1.711 km SSW of Waimea, Hawaii, United States10-27 22:54
- 1.123 km E of Hōlualoa, Hawaii, United States11-04 02:42
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.
Event id us6000u39d. First recorded here 19 Oct 2026, 04:55:52 UTC. Solutions: USGS · HV (usgs:hv75060646). Cite as: SeismoAtlas, “M2.9 earthquake 19 km ENE of Kalaoa, Hawaii, United States”, https://seismoatlas.com/earthquake/us6000u39d-m2-9-earthquake-19-km-ene-of-kalaoa-hawaii-united-states, data from USGS.
JSON: /api/v1/events/us6000u39d. SeismoAtlas is not an official warning service.