Historic Earthquakes

Near Ossipee Lake, New Hampshire
1940 12 20 07:27:26.2 UTC
Magnitude 5.50
Intensity VII

1940 12 24 13:43:45.0 UTC
Magnitude 5.50
Intensity VII

Largest Earthquake in New Hampshire

Isoseismal

Isoseismals are based on intensity estimates from data.

Isoseismal Map

Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.