15 km NNE of Beddington, Maine

2021-04-22 03:43 UTC · 5.9 km deep · released about 5.4 lb of TNT

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: 2021-04-22 03:43 UTC
Magnitude: M 1.5 (ml)
Depth: 5.9 km below the surface
Felt: no reports yet
Nearest: Washington County, 28 km E
Status: Reviewed by a seismologist

USGS · last changed by USGS 1912 days ago · we first saw it 1912 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
Around the size people start to feel M 3.0 180× the energy of this one
This earthquake M 1.5 about 5.4 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

Map loads when it scrolls into view

Epicentre 44.9734, -67.9697. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Washington County, ME	28 km (18 mi)	W of here	earthquakes near Washington County
Hancock County, ME	55 km (34 mi)	NE of here	earthquakes near Hancock County
Penobscot County, ME	73 km (45 mi)	SE of here	earthquakes near Penobscot County
Waldo County, ME	106 km (66 mi)	ENE of here	earthquakes near Waldo County
Knox County, ME	134 km (83 mi)	NE of here	earthquakes near Knox County
Piscataquis County, ME	137 km (85 mi)	SE 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.

1.6 15 km S of Lowell, Maine 07:35 UTC
1.5 4 km WNW of Milbridge, Maine 11:08 UTC
1.8 7 km NNE of Burlington, Maine 13:48 UTC
1.7 9 km NW of Grand Lake Stream, Maine 03:16 UTC
1.7 1 km NE of Aurora, Maine 02:35 UTC
1.6 4 km ENE of Centerville, Maine 13:41 UTC
1.5 2 km ESE of Eastbrook, Maine 06:45 UTC
1.6 Maine 00:28 UTC
1.6 4 km WNW of Jonesboro, Maine 14:21 UTC
1.9 5 km E of Centerville, Maine 21:01 UTC
2.6 4 km SE of Centerville, Maine 19:46 UTC
2.0 4 km WNW of Jonesboro, Maine 19:06 UTC
2.0 4 km WNW of Jonesboro, Maine 19:17 UTC
3.0 3 km SE of Centerville, Maine 06:55 UTC
1.7 3 km E of Centerville, Maine 13:06 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 18:56 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.