QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

55 km WSW of Kahaluu-Keauhou, Hawaii

· 26 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hawaii County 101 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
Magnitude
M 2.1 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 101 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2274 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 40 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.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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.

Where

Epicentre 19.3072, -156.4147. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 101 km (63 mi) WSW of here earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 2.3 52 km WSW of Captain Cook, Hawaii
  2. 2.9 56 km W of Kailua-Kona, Hawaii
  3. 2.3 11 km W of Kailua-Kona, Hawaii
  4. 2.0 25 km SSW of Honaunau-Napoopoo, Hawaii
  5. 2.9 13 km WSW of Kailua-Kona, Hawaii
  6. 1.9 12 km SSW of Captain Cook, Hawaii
  7. 2.4 21 km WSW of Kahaluu-Keauhou, Hawaii
  8. 2.4 57 km W of Kailua-Kona, Hawaii
  9. 2.9 33 km WSW of Captain Cook, Hawaii
  10. 2.4 26 km WSW of Kahaluu-Keauhou, Hawaii
  11. 3.1 49 km SW of Captain Cook, Hawaii
  12. 2.6 29 km SW of Honaunau-Napoopoo, Hawaii
  13. 2.0 7 km SW of Kahaluu-Keauhou, Hawaii
  14. 2.7 18 km W of Kailua-Kona, Hawaii
  15. 2.6 52 km WSW of Captain Cook, 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.