QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

6 km S of Friendship, Maine

· 5.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 17 kmKnox County 26 kmSagadahoc County 42 kmWaldo County 63 kmKennebec County 65 kmAndroscoggin County 76 kmCumberland County 82 kmHancock County 104 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 1.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Lincoln County, 17 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1287 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 43.9227, -69.3198. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lincoln County, ME 17 km (11 mi) ESE of here earthquakes near Lincoln County
Knox County, ME 26 km (16 mi) WSW of here earthquakes near Knox County
Sagadahoc County, ME 42 km (26 mi) E of here earthquakes near Sagadahoc County
Waldo County, ME 63 km (39 mi) SSW of here earthquakes near Waldo County
Kennebec County, ME 65 km (41 mi) SSE of here earthquakes near Kennebec County
Androscoggin County, ME 76 km (47 mi) ESE of here earthquakes near Androscoggin County

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

Aftershocks so far

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

  1. 1.8 9 km ESE of South Bristol, Maine
  2. 2.0 3 km N of Monhegan, Maine
  3. 2.5 4 km SW of Vinalhaven, Maine
  4. 1.9 8 km SSE of Friendship, 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.