QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

11 km S of Vinalhaven, Maine

· 5.0 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 19 kmLincoln County 54 kmWaldo County 63 kmHancock County 78 kmSagadahoc County 81 kmKennebec County 91 kmAndroscoggin County 112 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 2.3 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Knox County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2493 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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.

Where

Epicentre 43.9460, -68.8384. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, ME 19 km (12 mi) ESE of here earthquakes near Knox County
Lincoln County, ME 54 km (34 mi) E of here earthquakes near Lincoln County
Waldo County, ME 63 km (39 mi) SSE of here earthquakes near Waldo County
Hancock County, ME 78 km (49 mi) SSW of here earthquakes near Hancock County
Sagadahoc County, ME 81 km (50 mi) E of here earthquakes near Sagadahoc County
Kennebec County, ME 91 km (56 mi) SE of here earthquakes near Kennebec County

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

Aftershocks so far

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

  1. 2.0 3 km N of Monhegan, Maine
  2. 1.8 6 km ESE of Brooklin, Maine
  3. 2.5 4 km SW of Vinalhaven, Maine
  4. 1.9 8 km SSE of Friendship, Maine
  5. 1.8 6 km S of Friendship, Maine
  6. 1.9 7 km S of Friendship, Maine
  7. 1.9 4 km W of Tremont, Maine

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.