Interpreting earthquake seismograms at Lamont
Introduction
What this guide covers
How the guide is organized
Quick phase name reference
Computer resources
quake locations
,
distance to event
day of year
,
custom traveltimes
focal mechanisms
Data sources
Paper drum records
The Palisades seismograph station
Lamont Cooperative Seismic Network (LCSN)
Glossary
useful terms
diagrams
Body wave basics
P phase:
primary phase, direction to event
S phase:
primary phase, needed for distance to event
S-P time:
distance to event
pP and depth phases:
depth of event
PP phase:
surface reflection
PS phase:
conversion of wave type
PKP,PKiKP,PKIKP phases:
interaction with Earth's core
Surface wave basics
Dispersion:
continental or oceanic path to Palisades?
size of surface waves:
magnitude of event
Rayleigh waves:
incoming direction of event
sense of depth
Love waves:
This guide is maintained by
Michael West
. Please let me know of any problems you have or if there are additional topics you feel should be included.
URL: http://www.ldeo.columbia.edu/~mwest/palguide