QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km SW of Sebec, Maine

· 6.4 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Penobscot County 42 kmSomerset County 69 kmPiscataquis County 74 kmWaldo County 86 kmHancock County 98 kmFranklin County 103 kmKennebec 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 1.9 (ml)
Depth
6.4 km below the surface
Felt
no reports yet
Nearest
Penobscot County, 42 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 558 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 45.2495, -69.1570. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Penobscot County, ME 42 km (26 mi) WSW of here earthquakes near Penobscot County
Somerset County, ME 69 km (43 mi) ESE of here earthquakes near Somerset County
Piscataquis County, ME 74 km (46 mi) S of here earthquakes near Piscataquis County
Waldo County, ME 86 km (54 mi) N of here earthquakes near Waldo County
Hancock County, ME 98 km (61 mi) NW of here earthquakes near Hancock County
Franklin County, ME 103 km (64 mi) ENE of here earthquakes near Franklin County

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

Aftershocks so far

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

  1. 1.5 15 km ENE of Greenville, Maine
  2. 2.0 5 km ENE of Dover-Foxcroft, Maine
  3. 2.0 7 km ESE of Dover-Foxcroft, Maine
  4. 1.5 20 km WSW of Millinocket, Maine
  5. 1.5 7 km ESE of Cambridge, Maine
  6. 1.7 3 km N of Sangerville, 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.