QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

71 km WSW of Kahaluu-Keauhou, Hawaii

· 2.6 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Hawaii County 117 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
2.6 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 117 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2248 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 19.2565, -156.5535. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 117 km (72 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

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

  1. 2.6 Hawaii region, Hawaii
  2. 3.3 90 km W of Hawaiian Ocean View, Hawaii
  3. 3.4 94 km W of Kailua-Kona, Hawaii
  4. 3.5 55 km WSW of Captain Cook, Hawaii
  5. 2.6 56 km SW of Captain Cook, Hawaii
  6. 2.1 60 km W of Hawaiian Ocean View, Hawaii
  7. 3.4 49 km W of Hawaiian Ocean View, Hawaii
  8. 2.5 67 km SW of Captain Cook, Hawaii
  9. 3.2 51 km WSW of Captain Cook, Hawaii
  10. 2.4 28 km WSW of Captain Cook, Hawaii
  11. 2.8 55 km W of Hawaiian Ocean View, Hawaii
  12. 2.7 45 km WSW of Kailua-Kona, Hawaii
  13. 2.5 53 km W of Kailua-Kona, Hawaii
  14. 2.1 44 km WSW of Kailua-Kona, Hawaii
  15. 2.4 69 km W of Hawaiian Ocean View, 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.