QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3mb_lg

7 km ESE of Dedham, Maine

· 9.6 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hancock County 20 kmWaldo County 48 kmKnox County 78 kmPenobscot County 83 kmWashington County 84 kmKennebec County 98 kmLincoln County 105 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 3.3 (mb_lg)
Depth
9.6 km below the surface
Felt
150 reports · strongest reported intensity IV
Nearest
Hancock County, 20 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1271 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 150 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 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.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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

Epicentre 44.6651, -68.5787. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hancock County, ME 20 km (12 mi) NW of here earthquakes near Hancock County
Waldo County, ME 48 km (30 mi) ENE of here earthquakes near Waldo County
Knox County, ME 78 km (49 mi) NNE of here earthquakes near Knox County
Penobscot County, ME 83 km (52 mi) S of here earthquakes near Penobscot County
Washington County, ME 84 km (52 mi) WSW of here earthquakes near Washington County
Kennebec County, ME 98 km (61 mi) ENE of here earthquakes near Kennebec County

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

Aftershocks so far

13 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. 1.8 6 km ESE of Brooklin, Maine
  4. 2.1 3 km NE of Morrill, Maine
  5. 1.8 4 km SW of Blue Hill, Maine
  6. 1.7 1 km NE of Aurora, Maine
  7. 1.7 2 km SSE of Monroe, Maine
  8. 1.8 1 km NE of Swanville, Maine
  9. 1.5 2 km ESE of Eastbrook, Maine
  10. 1.9 6 km SE of North Penobscot, Maine
  11. 1.6 6 km ESE of Dedham, Maine
  12. 2.0 7 km E of Dedham, Maine
  13. 2.0 7 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.