Plate boundaries: loads data
base with plate boundaries, color coded by the type of boundary.
Continental crust: shows boundaries of continental crust, which
includes the shelves and some oceanic plateaus.
Earthquake focal mechanisms. This has >43,000 earthquakes
since the 1970's and is the most
versatile data set for earthquakes. It can show the
type of fault involved.
Major historic earthquakes: loads a data
base with major earthquakes. This will show 3526 major
earthquakes, going back to 2150 BC. These are someone's idea of the
most important earthquakes, and not necessarily representative of
where earthquakes occur
Volcanoes: loads a data base
with a listing of 1518 volcanoes
from the Global Volcanism Program of the
Smithsonian.
Fracture zones: loads a data base of marine fracture zones.
Button on
map window toolbar brings up pop up menu (also
available on Overlay menu):