QuakeIndex

Earthquake · reviewed by a seismologist

M 6.9mw

18 km SSW of Leilani Estates, Hawaii

· 5.8 km deep · released about 340 kilotons of TNT

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10 km30 km60 km120 km N Hawaii County 61 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 6.9 (mw)
Depth
5.8 km below the surface
Felt
1630 reports · strongest reported intensity VII
Measured shaking
intensity VIII (ShakeMap)
USGS impact alert
yellow
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Hawaii County, 61 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1036 days ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area. 1630 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.9 would have released about 32 times as much.

  1. Tōhoku, Japan 2011 M 9.1 2,000× the energy of this one
  2. San Francisco 1906 M 7.9 32× the energy of this one
  3. Ridgecrest, California 2019 M 7.1 2× the energy of this one
  4. This earthquake M 6.9 about 340 kilotons of TNT
  5. Northridge, California 1994 M 6.7 this one released 2× more
  6. Mineral, Virginia 2011 M 5.8 this one released 45× 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 19.3182, -154.9997. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hawaii County, HI 61 km (38 mi) ESE of here earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 2.2 9 km WSW of Volcano, Hawaii
  2. 2.3 20 km S of Volcano, Hawaii
  3. 1.8 15 km SSE of Volcano, Hawaii
  4. 2.6 22 km S of Volcano, Hawaii
  5. 1.9 8 km SW of Volcano, Hawaii
  6. 1.9 7 km WSW of Volcano, Hawaii
  7. 2.6 18 km S of Volcano, Hawaii
  8. 2.0 7 km SW of Volcano, Hawaii
  9. 2.7 20 km S of Volcano, Hawaii
  10. 2.1 Island of Hawaii, Hawaii
  11. 2.4 8 km SW of Volcano, Hawaii
  12. 3.0 2 km SSW of Volcano, Hawaii
  13. 2.4 9 km WSW of Volcano, Hawaii
  14. 2.8 2 km S of Volcano, Hawaii
  15. 3.3 16 km SSW of Leilani Estates, 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 5.7 on 2018-05-04.

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

On USGS

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