QuakeIndex

Earthquake · automatic estimate, may change

M 1.9md

23 km ESE of Naalehu, Hawaii

· 16 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Hawaii County 71 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 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 71 km N
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 2671 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.9727, -155.3833. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 71 km (44 mi) S of here earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 1.9 11 km N of P?hala, Hawaii
  2. 1.9 6 km S of P?hala, Hawaii
  3. 3.4 12 km S of Fern Forest, Hawaii
  4. 1.8 8 km ENE of P?hala, Hawaii
  5. 1.7 8 km ENE of P?hala, Hawaii
  6. 1.7 6 km SW of Volcano, Hawaii
  7. 2.4 3 km W of P?hala, Hawaii
  8. 1.7 6 km SW of Volcano, Hawaii
  9. 1.8 6 km SW of Volcano, Hawaii
  10. 2.4 8 km ENE of P?hala, Hawaii
  11. 2.4 9 km ENE of P?hala, Hawaii
  12. 2.4 5 km SSW of Volcano, Hawaii
  13. 1.9 6 km SW of Volcano, Hawaii
  14. 1.7 9 km E of P?hala, Hawaii
  15. 1.6 7 km ENE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.5 on 2019-03-13 — it released about 320,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.