This download page contains data that generated the printed and web versions of this map. All the data is in tab delimited text format and the following bullets are relevant notes:
Volcano data are sorted by volcano number used in Smithsonian data files. Sequence is broadly regional, starting with Europe and proceeding generally eastward around the world. Earthquake data are loosely sorted first by magnitude range, then by date. EQs >=5.5 from Engdahl & Villaseñor (2002) and those <5.5 from Engdahl (personal communication, 2003). Earthquakes that occurred from 1750 to 1960 within stable plate interiors on continents. Data are from A.C. Johnston (Center for Earthquake Research and Information, University of Memphis, written communication, 2002). Notable pre-1900 earthquakes. Impact crater data are sorted alphabetically by crater name. From University of New Brunswick/GSC database.
Plate boundary data were plotted for this map by Peter Vogt, Steve Kirby, and Paul Kimberly, based on data from DeMets (2002), Bird (2003), and other scientific literature. They are in lat/long ascii text line files.