QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

Earthquake near Honaunau-Napoopoo, HI

USGS: 26 km E of Honaunau-Napoopoo, Hawaii

10:06 pm HST, Sep 29, 2026 · · -3.3 km deep · released about 56 lb of TNT

Every earthquake near Honaunau-Napoopoo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hawaii County 23 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
10:06 pm HST on 29 September 2026 ()
Where
26 km (16 mi) E of Honaunau-Napoopoo, HI · earthquakes near Honaunau-Napoopoo
Magnitude
M 2.2 (ml)
Depth
-3.3 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 23 km NNE
Nearest mapped fault
Mauna Loa Volcano, 4 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2 days ago

A magnitude 2.2 earthquake was recorded 26 km (16 mi) E of Honaunau-Napoopoo, HI, at 10:06 pm HST on 29 September 2026 (08:06 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Pāhala.

How big was it?

This earthquake released about 56 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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 470,000 times the energy of this one.

Before 2016, the USGS record lists 34 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 22 km W of Volcano, Hawaii · 17 km E of this epicentre
  2. 6.4 Kaoiki area, Hawaii · 23 km E of this epicentre
  3. 6.3 20 km SSW of Honaunau-Napoopoo, Hawaii · 36 km WSW of this epicentre
  4. 6.2 8 km SW of Volcano, Hawaii · 33 km E of this epicentre
  5. 6.2 21 km N of Pahala, Hawaii · 18 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 19.4198, -155.6153. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hawaii County, HI 23 km (14 mi) NNE earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 1.9 3 km WSW of Pāhala, Hawaii
  2. 2.0 15 km E of Pāhala, Hawaii
  3. 2.5 3 km SW of Pāhala, Hawaii
  4. 1.6 5 km WSW of Volcano, Hawaii
  5. 1.9 5 km WSW of Volcano, Hawaii
  6. 1.9 5 km WSW of Volcano, Hawaii
  7. 1.9 5 km WSW of Volcano, Hawaii
  8. 1.6 5 km WSW of Volcano, Hawaii
  9. 1.9 5 km SW of Volcano, Hawaii
  10. 2.1 5 km WSW of Volcano, Hawaii
  11. 1.7 5 km WSW of Volcano, Hawaii
  12. 1.8 5 km WSW of Volcano, Hawaii
  13. 1.9 5 km WSW of Volcano, Hawaii
  14. 1.7 5 km WSW of Volcano, Hawaii
  15. 1.6 4 km WSW of Volcano, 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.