QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9mb_lg

4 km ESE of Centerville, Maine

· 5.0 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 31 kmHancock County 60 kmPenobscot County 114 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 2.9 (mb_lg)
Depth
5.0 km below the surface
Felt
17 reports · strongest reported intensity IV
Nearest
Washington County, 31 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1508 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 44.6871, -67.6285. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, ME 31 km (19 mi) S of here earthquakes near Washington County
Hancock County, ME 60 km (37 mi) ENE of here earthquakes near Hancock County
Penobscot County, ME 114 km (71 mi) SE of here earthquakes near Penobscot County
Waldo County, ME 120 km (75 mi) ENE of here earthquakes near Waldo County
Knox County, ME 133 km (83 mi) ENE of here earthquakes near Knox County

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

Aftershocks so far

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

  1. 1.5 4 km WNW of Milbridge, Maine
  2. 1.6 4 km ENE of Centerville, Maine
  3. 1.6 Maine
  4. 1.9 4 km WNW of Steuben, Maine
  5. 1.6 4 km WNW of Jonesboro, Maine
  6. 1.9 5 km E of Centerville, Maine
  7. 2.6 4 km SE of Centerville, Maine
  8. 2.0 4 km WNW of Jonesboro, Maine
  9. 2.0 4 km WNW of Jonesboro, Maine
  10. 3.0 3 km SE of Centerville, Maine
  11. 1.7 3 km E of Centerville, Maine
  12. 2.6 4.7 km WNW of Jonesboro, Maine
  13. 1.8 3 km E of Centerville, Maine
  14. 1.6 Maine
  15. 2.8 4 km E of Centerville, 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.