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

It is available only as part of the digital files from which the entire map was made. 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.

This metadata record describes the data on earthquakes and topography. Other data, such as for roads and urban areas, were obtained elsewhere and we lack metadata for them. Instead, this field cites the sources of these data that were obtained elsewhere.