QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

55 km ESE of Naalehu, Hawaii

· 41 km deep · released about 49 lb of TNT

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10 km30 km60 km120 km N Hawaii County 94 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
41 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 94 km NNW
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 49 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 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 18.8305, -155.1165. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 94 km (59 mi) SSE of here earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 1.6 40 km ESE of Naalehu, Hawaii
  2. 1.8 17 km SE of Naalehu, Hawaii
  3. 1.6 39 km ESE of Naalehu, Hawaii
  4. 1.7 40 km SE of Naalehu, Hawaii
  5. 1.6 38 km SE of Naalehu, Hawaii
  6. 1.9 24 km SSW of Leilani Estates, Hawaii
  7. 1.9 16 km ESE of Naalehu, Hawaii
  8. 2.0 19 km S of Naalehu, Hawaii
  9. 2.8 18 km SE of Naalehu, Hawaii
  10. 1.8 22 km E of P?hala, Hawaii
  11. 1.9 53 km SE of Naalehu, Hawaii
  12. 2.0 24 km SSE of Fern Forest, Hawaii
  13. 1.7 42 km SE of Naalehu, Hawaii
  14. 1.8 23 km SSE of Fern Forest, Hawaii
  15. 1.8 7 km ESE of P?hala, 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.