53 km ENE of Honomu, Hawaii

2021-03-13 03:38 UTC · 5.3 km deep · released about 1.5 tons of TNT

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: 2021-03-13 03:38 UTC
Magnitude: M 3.3 (ml)
Depth: 5.3 km below the surface
Felt: 3 reports · strongest reported intensity III
Nearest: Hawaii County, 104 km SW
Status: Reviewed by a seismologist

USGS · last changed by USGS 1951 days ago · we first saw it 1951 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

Northridge, California 1994 M 6.7 110,000× the energy of this one
Mineral, Virginia 2011 M 5.8 4,900× the energy of this one
Magna, Utah 2020 M 5.7 3,500× the energy of this one
This earthquake M 3.3 about 1.5 tons of TNT
Around the size people start to feel M 3.0 this one released 3.2× 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

Map loads when it scrolls into view

Epicentre 20.1372, -154.6877. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Hawaii County, HI	104 km (65 mi)	NE 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.

1.9 11 km E of Pāpa‘ikou, Hawaii 11:34 UTC
1.9 40 km NE of Laupāhoehoe, Hawaii 06:54 UTC
1.7 25 km NNE of Hawaiian Paradise Park, Hawaii 00:10 UTC
2.4 16 km NE of Honomu, Hawaii 07:13 UTC
2.2 10 km E of Pāpa‘ikou, Hawaii 21:22 UTC
3.5 75 km ENE of Honomu, Hawaii 10:29 UTC
2.5 26 km NE of Hawaiian Paradise Park, Hawaii 19:53 UTC
2.3 12 km ENE of Pāpa‘ikou, Hawaii 21:17 UTC
2.6 21 km NE of Hawaiian Beaches, Hawaii 18:17 UTC
2.0 28 km NE of Laupāhoehoe, Hawaii 21:49 UTC
2.3 22 km NNE of Hawaiian Paradise Park, Hawaii 06:44 UTC
1.9 11 km NNE of Honomu, Hawaii 18:46 UTC
2.6 24 km ENE of Pepeekeo, Hawaii 21:29 UTC
2.6 9 km NE of Honomu, Hawaii 14:04 UTC
1.9 16 km E of Pepeekeo, Hawaii 00:55 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 11:41 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

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