A Digital Tectonic Activity Map of the Earth

摘要: This paper presents two Robinson Projection versions of a map showing tectonic and volcanic activity the geologic present, defined as last one million years. One version is shaded-relief base computer-generated from National Geophysical Data Center digital elevation model, other schematic in addition distribution continental oceanic crust. Volcanic features active within years were generalized Smithsonian Institution Holocene volcanism compilations, supplemented by maps orbital photography. Global seismicity (1963–1998) was digitally compiled U.S. Geological Survey databases. Horizontal motions Very Long Baseline Interferometry (VLBI) space geodesy stations Goddard Space Flight data. Sources for all data are given, including Internet URLs. The public domain may be freely reproduced if source credited. Tectonic impli...