QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1ml

52 km ESE of Naalehu, Hawaii

· 7.8 km deep · released about 23 tons 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 4.1 (ml)
Depth
7.8 km below the surface
Felt
4 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Hawaii County, 94 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1212 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 23 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,400× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 330× the energy of this one
  3. Magna, Utah 2020 M 5.7 230× the energy of this one
  4. This earthquake M 4.1 about 23 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 48× more

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 18.8155, -155.1603. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 94 km (58 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

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

  1. 2.1 10 km SSE of P?hala, Hawaii
  2. 1.9 8 km SSW of P?hala, Hawaii
  3. 2.3 10 km E of P?hala, Hawaii
  4. 1.6 12 km ESE of P?hala, Hawaii
  5. 1.9 14 km ESE of P?hala, Hawaii
  6. 1.9 10 km ENE of Naalehu, Hawaii
  7. 2.3 5 km SSE of P?hala, Hawaii
  8. 2.2 9 km SE of P?hala, Hawaii
  9. 2.1 11 km E of P?hala, Hawaii
  10. 2.0 10 km E of P?hala, Hawaii
  11. 2.2 13 km ESE of P?hala, Hawaii
  12. 1.7 19 km ESE of Naalehu, Hawaii
  13. 2.3 21 km E of P?hala, Hawaii
  14. 1.7 Island of Hawaii, Hawaii
  15. 2.2 10 km E 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 6.2 on 2021-10-10 — it released about 1,400 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.