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Unformatted text preview: quake _seeding ???
f luid injection Land use planning
types of construction and
determining where it is safest
to build (in anticipation of
earthquake) Structural design and building
35 Summary of earthquake occurrence
Earthquakes release of stored energy in earth crust
Earthquakes: where stress >> rock strength
Energy travels in waves:
Surface waves (slowest most destructive);
Body or interior waves:
P primary (fastest), S secondary
Focus = source
Epicentre = location on earth surface
Size: measured by intensity and magnitude
Most common magnitude scale: Richter scale
Where: in a few relatively narrow zones around the globe
36 12 Summary of earthquakes and humans
Amount of destruction is a function of:
the magnitude and duration of the shaking
Substrate (underlying soil or rock)
Shaking, rupture, liquefaction, fires, land slides, tsunamis
Yes!!! When??? difficult to say, predictions are at best a
range… current thinking: “if you live your whole life in
California you will likely see a BIG ONE” 37 END OF LECTURE 38 13...
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This document was uploaded on 02/25/2014.
- Fall '14