Civil Engineering Reference
In-Depth Information
Key
Subduction zone
Strike-slip (transform) faults
Uncertain plate boundry
Ridge axis
FIGURE 2.1
The major tectonic plates, mid-oceanic ridges, trenches, and transform faults of the earth.
Arrows indicate directions of plate movement. (
Developed by Fowler 1990, reproduced from Kramer 1996.
)
FIGURE 2.2
Worldwide seismic activity, where the dots represent the epicenters of significant earth-
quakes. In comparing Figs. 2.1 and 2.2, the great majority of the earthquakes are located at the boundaries
between plates. (
Developed by Bolt 1988, reproduced from Kramer 1996.
)
