63 km E of Hamlin, Maine

A magnitude 1.8 earthquake was recorded 63 km E of Hamlin, Maine at 12:12 UTC on 2021-03-25. 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.

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 4 earthquakes of M5 or more within 50 km:

1. 5.7 86 km E of Hamlin, Maine · 24 km E of this epicentre Jan 9, 1982
2. 5.4 86 km E of Hamlin, Maine · 24 km E of this epicentre Jan 11, 1982
3. 5.1 87 km W of Miramichi, Canada · 24 km E of this epicentre Jan 9, 1982
4. 5.0 83 km W of Miramichi, Canada · 28 km E of this epicentre Mar 31, 1982

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 47.0010, -66.9669. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.3 82 km W of Miramichi, Canada 21:31 UTC
2. 1.9 69 km ENE of Florenceville-Bristol, Canada 21:10 UTC
3. 2.1 76 km W of Miramichi, Canada 06:11 UTC
4. 2.3 84 km W of Miramichi, Canada 00:34 UTC
5. 1.8 60 km ENE of Florenceville-Bristol, Canada 00:44 UTC
6. 2.4 83 km W of Miramichi, Canada 12:48 UTC
7. 2.3 81 km W of Miramichi, Canada 16:38 UTC
8. 2.0 80 km W of Miramichi, Canada 07:24 UTC
9. 2.2 83 km E of Hamlin, Maine 07:15 UTC
10. 2.0 82 km W of Miramichi, Canada 07:13 UTC
11. 2.0 77 km W of Miramichi, Canada 00:20 UTC
12. 2.3 80 km W of Miramichi, Canada 20:16 UTC
13. 2.1 84 km W of Miramichi, Canada 07:35 UTC
14. 2.2 84 km W of Miramichi, Canada 07:10 UTC
15. 2.3 78 km W of Miramichi, Canada 12:23 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:37 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.