New Hampshire Earthquake History

Name: New Hampshire — earthquake history (magnitude 4.5+)
Creator: U.S. Geological Survey
License: https://www.usa.gov/government-works

Since December 20, 1940, the USGS has recorded 3 earthquakes of magnitude 4.5 or greater in New Hampshire. The strongest was M 5.6.

By decade

'40

'80

Strongest in New Hampshire

M 5.6 · 5 km NNW of Tamworth, New HampshireDecember 24, 1940 M 5.3 · 8 km W of Tamworth, New HampshireDecember 20, 1940 M 4.5 · 1 km NW of Sanbornton, New HampshireJanuary 19, 1982

All recorded earthquakes

M 4.5 mbJanuary 19, 1982

1 km NW of Sanbornton, New Hampshire · depth 8 km

M 5.6 mwDecember 24, 1940

5 km NNW of Tamworth, New Hampshire · depth 8 km

M 5.3 mwDecember 20, 1940

8 km W of Tamworth, New Hampshire · depth 10 km

Source: U.S. Geological Survey, Earthquake Hazards Program. Older and smaller earthquakes are under-counted relative to recent decades as instrumentation improved. A record of past shaking is not a forecast. See About the Data.