Geol/Nats107

Illustrations

Seismology

Focus and epicenter

Wave fronts and ray paths

P wave vibrations

P and S wave vibrations

Travel times for P, S, and L waves

Locating an earthquake with three seismic stations

Another look at location

Seismic records at different distances

A vertical seismograph

Seismographs

Horizontal seismographs

Causes of Seismic velocity

Charleston Earthquake

Seismic velocities in the mantle and core

Refraction at depth

Shadow zone

Earthquake depth below Japan

Shallow and deep earthquakes in the Pacific

The aesthenosphere

Last Modified July 8, 1997 RD