QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9ml

64 km SSW of Mākena, Hawaii

· -0.4 km deep · released about 10 tons of TNT

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10 km30 km60 km120 km N Maui County 85 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 3.9 (ml)
Depth
-0.4 km below the surface
Felt
7 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Maui County, 85 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 969 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 10 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 17,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 760× the energy of this one
  3. Magna, Utah 2020 M 5.7 540× the energy of this one
  4. This earthquake M 3.9 about 10 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 21× 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 20.0875, -156.5823. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maui County, HI 85 km (53 mi) S of here earthquakes near Maui County
Hawaii County, HI 125 km (78 mi) WNW of here earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 1.9 27 km WNW of Kalaoa, Hawaii
  2. 2.6 38 km NW of Kalaoa, Hawaii
  3. 2.6 29 km WNW of Kalaoa, Hawaii
  4. 2.5 80 km SSW of Mākena, Hawaii
  5. 2.7 54 km SSW of Mākena, Hawaii
  6. 2.3 27 km WNW of Kalaoa, Hawaii
  7. 1.9 49 km S of Mākena, Hawaii
  8. 2.5 61 km WNW of Kailua-Kona, Hawaii
  9. 2.6 53 km W of Kailua-Kona, Hawaii
  10. 2.6 67 km WNW of Kalaoa, Hawaii
  11. 3.2 90 km SSW of Mākena, Hawaii
  12. 3.1 42 km WSW of Hāwī, Hawaii
  13. 2.6 58 km W of Kailua-Kona, Hawaii
  14. 2.7 36 km SSW of Mākena, Hawaii
  15. 3.3 34 km WNW of Puako, 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 4.2 on 2021-07-07 — it released about 2.7 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.