Stories by Don L. Anderson

By analyzing many earthquake waves with this technique, it is now possible to map the earth's mantle in three dimensions. The maps throw light on the convective row that propels the crustal plates

This well-known break in the earth's crust is actually not one fault but a system of faults. The break separates a northward-moving wedge of California, including Los Angeles, from the rest of North America

Earthquake waves indicate that at a depth between 37 and 155 miles the stuff of the earth is less rigid than that above and below it. Such a layer would have an important bearing on tectonic processes