Earthquake · reviewed by a seismologist
M 1.8ml
1 km NE of Swanville, Maine
- When
- Magnitude
- M 1.8 (ml)
- Depth
- 6.6 km below the surface
- Felt
- no reports yet
- Nearest
- Waldo County, 13 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 886 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.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- 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 44.5312, -68.9794. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Waldo County, ME | 13 km (8 mi) | ENE of here | earthquakes near Waldo County |
| Hancock County, ME | 48 km (30 mi) | W of here | earthquakes near Hancock County |
| Knox County, ME | 55 km (34 mi) | N of here | earthquakes near Knox County |
| Kennebec County, ME | 64 km (40 mi) | ENE of here | earthquakes near Kennebec County |
| Lincoln County, ME | 73 km (46 mi) | NE of here | earthquakes near Lincoln County |
| Sagadahoc County, ME | 97 km (60 mi) | NE of here | earthquakes near Sagadahoc County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 2.1 3 km NE of Morrill, Maine
- 1.8 4 km SW of Blue Hill, Maine
- 1.8 3 km SE of Morrill, Maine
- 1.7 2 km SSE of Monroe, 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
- 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.