QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Hana, HI

USGS: 33 km ESE of Hana, Hawaii

12:52 am HST, Oct 10, 2017 · · 1.9 km deep · released about 360 lb of TNT

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10 km30 km60 km120 km N Maui County 96 kmHawaii County 115 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
12:52 am HST on 10 October 2017 ()
Where
33 km (21 mi) ESE of Hana, HI · earthquakes near Hana
Magnitude
M 2.7 (ml)
Depth
1.9 km below the surface
Felt
no reports yet
Nearest
Maui County, 96 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2279 days ago

A magnitude 2.7 earthquake was recorded 33 km (21 mi) ESE of Hana, HI, at 12:52 am HST on 10 October 2017 (10:52 UTC). This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.2 on 2017-07-30 — about 170 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 10 km ENE of Wailua, Hawaii · 48 km NW of this epicentre
  2. 6.0 41 km NE of Hala‘ula, Hawaii · 26 km ESE of this epicentre
  3. 6.0 51 km NNE of Honoka‘a, Hawaii · 50 km ESE of this epicentre
  4. 5.8 2 km WSW of Hana, Hawaii · 35 km WNW of this epicentre
  5. 5.1 24 km WNW of H?w?, Hawaii · 45 km SW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 20.6160, -155.7113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Maui County, HI 96 km (60 mi) WNW earthquakes near Maui County
Hawaii County, HI 115 km (72 mi) S earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 2.3 11 km NNW of Kukuihaele, Hawaii
  2. 1.8 19 km N of Kukuihaele, Hawaii
  3. 5.2 12 km NNW of Kukuihaele, Hawaii
  4. 2.1 36 km NNE of Hala‘ula, Hawaii
  5. 2.7 32 km NW of H?w?, Hawaii
  6. 2.4 3 km E of Hala‘ula, Hawaii
  7. 2.5 30 km NNE of Honoka‘a, Hawaii
  8. 2.8 19 km NW of H?w?, Hawaii
  9. 2.9 14 km N of Kukuihaele, Hawaii
  10. 1.9 7 km SSE of Hala‘ula, Hawaii
  11. 2.5 Hawaii region, Hawaii
  12. 2.5 16 km N of Hala‘ula, Hawaii
  13. 2.3 5 km S of Kapaau, Hawaii
  14. 3.0 3 km SSE of Kapaau, Hawaii
  15. 2.3 14 km NNE of Hala‘ula, 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.