Digital spatial data for the map "Earthquakes in and near the northeastern United States, 1638-1998"

The data are those used to make a large-format, colored map of
earthquakes in the northeastern United States and adjacent parts
of Canada and the Atlantic Ocean (Wheeler, 2000; Wheeler and
others, 2001; references in Data_Quality_Information, Lineage).
The map shows the locations of 1,069 known earthquakes of
magnitude 3.0 or larger, and is designed for a non-technical
audience. Colored circles represent earthquake locations, colored
and sized by magnitude. Short descriptions, colonial-era
woodcuts, newspaper headlines, and photographs summarize the
dates, times of day, damage, and other effects of notable
earthquakes. The base map shows color-coded elevation, shaded to
emphasize relief.