QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5mb_lg

4 km SW of Vinalhaven, Maine

· 10 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 14 kmLincoln County 52 kmWaldo County 55 kmHancock County 73 kmSagadahoc County 79 kmKennebec County 84 kmAndroscoggin County 108 kmCumberland County 119 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 2.5 (mb_lg)
Depth
10 km below the surface
Felt
261 reports · strongest reported intensity IV
Nearest
Knox County, 14 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 319 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 261 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 44.0121, -68.8689. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, ME 14 km (9 mi) ESE of here earthquakes near Knox County
Lincoln County, ME 52 km (32 mi) E of here earthquakes near Lincoln County
Waldo County, ME 55 km (34 mi) SSE of here earthquakes near Waldo County
Hancock County, ME 73 km (45 mi) SSW of here earthquakes near Hancock County
Sagadahoc County, ME 79 km (49 mi) E of here earthquakes near Sagadahoc County
Kennebec County, ME 84 km (52 mi) ESE of here earthquakes near Kennebec County

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

Aftershocks so far

2 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

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.