QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km E of Great Pond, Maine

· 5.8 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hancock County 43 kmWashington County 48 kmPenobscot County 63 kmWaldo County 87 kmKnox County 118 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
5.8 km below the surface
Felt
no reports yet
Nearest
Hancock County, 43 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2780 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 44.9338, -68.2217. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hancock County, ME 43 km (27 mi) NNE of here earthquakes near Hancock County
Washington County, ME 48 km (30 mi) W of here earthquakes near Washington County
Penobscot County, ME 63 km (39 mi) SSE of here earthquakes near Penobscot County
Waldo County, ME 87 km (54 mi) NE of here earthquakes near Waldo County
Knox County, ME 118 km (74 mi) NNE of here earthquakes near Knox County
Piscataquis County, ME 129 km (80 mi) SSE of here earthquakes near Piscataquis County

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

Aftershocks so far

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

  1. 1.6 15 km S of Lowell, Maine
  2. 1.8 2 km NNW of Ellsworth, Maine
  3. 1.5 4 km WNW of Milbridge, Maine
  4. 1.8 7 km NNE of Burlington, Maine
  5. 1.7 9 km NW of Grand Lake Stream, Maine
  6. 1.7 1 km NE of Aurora, Maine
  7. 1.5 2 km ESE of Eastbrook, Maine
  8. 1.6 Maine
  9. 1.6 6 km ESE of Dedham, Maine
  10. 2.0 7 km E of Dedham, Maine
  11. 2.0 7 km ESE of Dedham, Maine
  12. 3.3 7 km ESE of Dedham, Maine
  13. 1.8 7 km E of Dedham, Maine
  14. 1.8 7 km ESE of Dedham, Maine
  15. 1.9 8 km ESE of Dedham, 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.