QuakeIndex

Earthquake · reviewed by a seismologist

M 4.7ml

85 km NNE of Pa‘auilo, Hawaii

· 33 km deep · released about 180 tons of TNT

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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 4.7 (ml)
Depth
33 km below the surface
Felt
76 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2274 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 76 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 930× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 42× the energy of this one
  3. Magna, Utah 2020 M 5.7 30× the energy of this one
  4. This earthquake M 4.7 about 180 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 380× 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 20.7690, -155.0838. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.7 105 km NNE of Laupāhoehoe, Hawaii
  2. 3.0 109 km NNE of Pa‘auilo, Hawaii
  3. 3.0 72 km NNE of Laupāhoehoe, Hawaii
  4. 3.0 96 km NNE of Pa‘auilo, Hawaii
  5. 4.6 97 km NNE of Laupāhoehoe, Hawaii
  6. 2.8 99 km NNE of Pa‘auilo, Hawaii
  7. 2.5 64 km ENE of Hana, Hawaii
  8. 2.8 87 km ENE of Hana, Hawaii
  9. 3.0 102 km NNE of Pa‘auilo, Hawaii
  10. 3.1 95 km NNE of Laup?hoehoe, Hawaii
  11. 3.1 94 km NNE of Laup?hoehoe, Hawaii
  12. 3.6 57 km NNE of Pa‘auilo, Hawaii
  13. 2.0 47 km NNE of Pa‘auilo, 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.