Earthquake near Captain Cook, HI

USGS: 1 km WNW of Captain Cook, Hawaii

1:14 am HST, Sep 29, 2026 · 2026-09-29 11:14 UTC · 14 km deep · released about 14 lb of TNT

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Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 1:14 am HST on 29 September 2026 (2026-09-29 11:14 UTC)
Where: in Captain Cook, HI · earthquakes near Captain Cook
Magnitude: M 1.8 (md)
Depth: 14 km below the surface
Felt: no reports yet
Nearest: Hawaii County, 47 km ENE
Status: Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS 4 days ago · we first saw it 4 days ago

A magnitude 1.8 earthquake was recorded in Captain Cook, HI, at 1:14 am HST on 29 September 2026 (11:14 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Kealakekua, Honalo, Kahaluu-Keauhou, Honaunau-Napoopoo, Hōlualoa, Kailua-Kona.

How big was it?

This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
Magna, Utah 2020 M 5.7 760,000× the energy of this one
Around the size people start to feel M 3.0 68× the energy of this one
This earthquake M 1.8 about 14 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 6.0 on 2026-05-23 — about 1,900,000 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

6.7 14 km SW of Puako, Hawaii · 41 km N of this epicentre Oct 15, 2006
6.5 Hualālai area, Hawaii · 28 km NNW of this epicentre Oct 6, 1929
6.3 20 km SSW of Honaunau-Napoopoo, Hawaii · 25 km S of this epicentre Aug 21, 1951
5.6 3 km NW of Kalaoa, Hawaii · 28 km NNW of this epicentre Sep 26, 1929
5.6 30 km WNW of Volcano, Hawaii · 44 km E of this epicentre Nov 21, 1935

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Map loads when it scrolls into view

Epicentre 19.5047, -155.9370. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Hawaii County, HI	47 km (29 mi)	ENE	earthquakes near Hawaii County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

8 earthquakes have been recorded within 50 km since this one.

2.1 10 km NE of Honaunau-Napoopoo, Hawaii 20:28 UTC
1.8 12 km NNW of Wai‘ōhinu, Hawaii 02:03 UTC
1.6 14 km N of Pāhala, Hawaii 21:18 UTC
2.4 3 km SE of Honaunau-Napoopoo, Hawaii 16:31 UTC
2.2 25 km E of Honaunau-Napoopoo, Hawaii 08:59 UTC
2.2 26 km E of Honaunau-Napoopoo, Hawaii 08:06 UTC
2.5 9 km SSW of Puako, Hawaii 01:07 UTC
1.9 19 km N of Pāhala, Hawaii 23:48 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 01:04 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.