Earthquake Risk in Massachusetts
Massachusetts has low to moderate seismic risk. The state has a notable earthquake history including the 1755 Cape Ann earthquake (estimated M6.0-6.3), one of the largest in the northeastern US. Boston's soft fill soils could amplify shaking from a significant event.
The largest earthquake recorded in Massachusetts was a magnitude 3.6 10 km S of Bliss Corner, Massachusetts on November 8, 2020. Massachusetts has 6 notable earthquakes on record since 2004.
Notable Earthquakes
6
Recorded in or near Massachusetts (since 2004)
Largest Earthquake
M3.6
10 km S of Bliss Corner, Massachusetts (Nov 2020)
Most Recent
M3.6
Nov 8, 2020
Notable Earthquakes
Significant earthquakes recorded in or near this state.
| Magnitude | Location | Depth | Date |
|---|---|---|---|
| M3.6 | 10 km S of Bliss Corner, Massachusetts | 10.0 km | Nov 8, 2020 |
| M3.3 | 0 km NE of Wauregan, Connecticut | 5.4 km | Jan 12, 2015 |
| M2.7 | 6 km SW of Deep River Center, Connecticut | 4.1 km | Aug 14, 2014 |
| M2.6 | 2 km E of Wauregan, Connecticut | 8.8 km | Jan 13, 2015 |
| M2.5 | 2 km WSW of Littleton Common, Massachusetts | 0.5 km | Oct 19, 2007 |
| M2.5 | 4 km S of Plymouth, Massachusetts | 5.0 km | Nov 17, 2005 |
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