QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

38 km WNW of Millinocket, Maine

· 5.0 km deep · released about 15 lb of TNT

10 km30 km60 km120 km N Piscataquis County 13 kmPenobscot County 58 kmSomerset County 71 kmAroostook County 109 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
Piscataquis County, 13 km NNE
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 45.8061, -69.1545. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Piscataquis County, ME 13 km (8 mi) SSW of here earthquakes near Piscataquis County
Penobscot County, ME 58 km (36 mi) NW of here earthquakes near Penobscot County
Somerset County, ME 71 km (44 mi) ENE of here earthquakes near Somerset County
Aroostook County, ME 109 km (68 mi) SSW of here earthquakes near Aroostook County
Franklin County, ME 135 km (84 mi) NE of here earthquakes near Franklin County
Washington County, ME 153 km (95 mi) NW of here earthquakes near Washington County

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

Aftershocks so far

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

  1. 1.5 15 km ENE of Greenville, Maine
  2. 1.5 20 km WSW of Millinocket, Maine
  3. 1.5 23 km WNW of Millinocket, Maine
  4. 2.5 35 km NW of Millinocket, Maine
  5. 1.5 31 km W of Millinocket, Maine
  6. 1.5 24 km WNW of Millinocket, Maine
  7. 1.8 19 km SW of Millinocket, 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.