Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Machias, ME
No earthquake was likely felt in Machias in the 24 hours to 3:37 pm EST (20:37 UTC). The last one was M 3.8, 309 km (192 mi) SW, at 10:22 am EST on 27 January 2025, estimated intensity II (weak) in town; 42,440 felt reports to USGS. Every earthquake near Machias
This page: a magnitude 1.6 earthquake was recorded 13 km (8 mi) west of Machias, ME, at 8:41 am EST on 18 December 2023 (13:41 UTC), 6.8 km deep.
USGS: 4 km ENE of Centerville, Maine
- When
- 8:41 am EST on 18 December 2023 ()
- Where
- 13 km (8 mi) west of Machias, ME · earthquakes near Machias
- Magnitude
- M 1.6 (ml)
- Depth
- 6.8 km below the surface
- Felt
- no reports yet
- Nearest
- Washington County, 27 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 989 days ago
Earthquake alerts for Machias, ME
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 3 km (2 mi) from the epicentre. In Machias, 13 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Addison, Machiasport, East Machias, Jonesport, Cherryfield, Milbridge.
How big was it?
This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.7 Passamaquoddy Bay area, Maine · 46 km NE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 44.7228, -67.6284. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Washington County, ME | 27 km (17 mi) | N | earthquakes near Washington County |
| Hancock County, ME | 61 km (38 mi) | WSW | earthquakes near Hancock County |
| Penobscot County, ME | 112 km (69 mi) | NW | earthquakes near Penobscot County |
| Waldo County, ME | 121 km (75 mi) | WSW | earthquakes near Waldo County |
| Knox County, ME | 135 km (84 mi) | WSW | earthquakes near Knox County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has been recorded within 50 km since this one.
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.