QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

Earthquake near Captain Cook, HI

No earthquake was likely felt in Captain Cook in the 24 hours to 1:50 am HST (11:50 UTC). The last one was M 2.9, 29 km (18 mi) N, at 12:08 pm HST on 6 November 2026, estimated intensity II (weak) in town; 29 felt reports to USGS. Every earthquake near Captain Cook

This page: a magnitude 2.8 earthquake was recorded in Captain Cook, HI, at 3:02 am HST on 6 June 2019 (13:02 UTC), 11 km deep. 5 people have reported feeling it to USGS.

USGS: 0 km N of Captain Cook, Hawaii

3:02 am HST, Jun 6, 2019 · · 11 km deep · released about 490 lb of TNT

Every earthquake near Captain Cook Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hawaii County 45 km
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
3:02 am HST on 6 June 2019 ()
Where
in Captain Cook, HI · earthquakes near Captain Cook
Hawaii today
every earthquake in Hawaii in the last 24 hours
Magnitude
M 2.8 (ml)
Depth
11 km below the surface
Felt
5 reports · strongest reported intensity IV
Nearest
Hawaii County, 45 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2636 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 26 km (16 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Captain Cook in town, intensity III · Honaunau-Napoopoo 8 km, intensity III · Hōlualoa 13 km, intensity II · Kailua-Kona 17 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 490 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 5.3 on 2019-04-14 — about 6,200 times the energy of this one.

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

  1. 6.7 14 km SW of Puako, Hawaii · 42 km N of this epicentre
  2. 6.5 Hualālai area, Hawaii · 29 km NNW of this epicentre
  3. 6.3 20 km SSW of Honaunau-Napoopoo, Hawaii · 25 km S of this epicentre
  4. 5.6 3 km NW of Kalaoa, Hawaii · 29 km NNW of this epicentre
  5. 5.6 30 km WNW of Volcano, Hawaii · 42 km E of this epicentre

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

Epicentre 19.5038, -155.9215. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hawaii County, HI 45 km (28 mi) ENE earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 2.3 27 km E of Honaunau-Napoopoo, Hawaii
  2. 1.8 25 km W of Volcano, Hawaii
  3. 2.2 27 km E of Honaunau-Napoopoo, Hawaii
  4. 1.7 9 km SE of Waikoloa, Hawaii
  5. 1.9 26 km E of Honaunau-Napoopoo, Hawaii
  6. 3.1 27 km E of Honaunau-Napoopoo, Hawaii
  7. 1.7 29 km E of Honaunau-Napoopoo, Hawaii
  8. 2.4 26 km E of Honaunau-Napoopoo, Hawaii
  9. 2.3 27 km E of Honaunau-Napoopoo, Hawaii
  10. 1.8 15 km NE of Honaunau-Napoopoo, Hawaii
  11. 1.8 16 km S of Waikoloa, Hawaii
  12. 2.0 8 km SSE of Waikoloa, Hawaii
  13. 1.9 11 km N of P?hala, Hawaii
  14. 1.9 6 km NE of Honaunau-Napoopoo, Hawaii
  15. 2.6 10 km S of Honaunau-Napoopoo, Hawaii

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

On USGS

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