Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Honaunau-Napoopoo, HI
USGS: 10 km NE of Honaunau-Napoopoo, Hawaii
- When
- 10:28 am HST on 1 October 2026 ()
- Where
- 10 km (6 mi) NE of Honaunau-Napoopoo, HI · earthquakes near Honaunau-Napoopoo
- Magnitude
- M 2.1 (ml)
- Depth
- 7.4 km below the surface
- Felt
- no reports yet
- Nearest
- Hawaii County, 32 km ENE
- Nearest mapped fault
- Mauna Loa Volcano, 20 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 29 hours ago
A magnitude 2.1 earthquake was recorded 10 km (6 mi) NE of Honaunau-Napoopoo, HI, at 10:28 am HST on 1 October 2026 (20:28 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, Captain Cook, Honalo, Kahaluu-Keauhou, Hōlualoa, Kailua-Kona.
How big was it?
This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
- Magna, Utah 2020 M 5.7 290,000× the energy of this one
- Around the size people start to feel M 3.0 26× the energy of this one
- This earthquake M 2.1 about 37 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 710,000 times the energy of this one.
Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 22 km W of Volcano, Hawaii · 37 km ESE of this epicentre
- 6.7 14 km SW of Puako, Hawaii · 43 km NNW of this epicentre
- 6.5 Hualālai area, Hawaii · 34 km NW of this epicentre
- 6.4 Kaoiki area, Hawaii · 42 km ESE of this epicentre
- 6.3 20 km SSW of Honaunau-Napoopoo, Hawaii · 30 km SSW 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 19.5143, -155.7908. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Hawaii County, HI | 32 km (20 mi) | ENE | earthquakes near Hawaii County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.7 11 km NE of Pāhala, Hawaii
- 1.8 1 km SSE of Pāhala, Hawaii
- 1.9 3 km SW of Pāhala, Hawaii
- 1.9 4 km SW of Pāhala, Hawaii
- 1.9 1 km NW of Pāhala, Hawaii
- 1.9 5 km SSW of Pāhala, 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| review status | automatic | reviewed | |
| location | 9 km NE of Honaunau-Napoopoo, Hawaii | 10 km NE of Honaunau-Napoopoo, Hawaii | |
| longitude | -155.79 | -155.79 | |
| latitude | 19.51 | 19.51 | |
| depth | 8.8 | 7.43 | |
| magnitude | 2.11 | 2.06 |
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.