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Summary of seismology component of the course
• Sources
• Waves
• Location
• Magnitude/Intensity
• Focal mechanisms
• Other topics
Sources
• source models
• Double couple forces
• Moment tensors
Waves• Notation (teleseisms)
P, S = mantle phasesK = outer core P waveI,(J) = inner core P and S
c = reflection from the outer corepP, sP = reflections from the earth surface near the
source(Lower case = reflection)
PKP = P wave in mantle, outer core, mantlePcP = Mantle phase reflected from the outer core
Waves• Notation (local)
– Pg– Pn– P*
• Near field / Far field
Location
• General principles
• Station corrections
• depth control
Magnitude and Intensity
• Mw, Mwp, ML, Mb, etc.
• Intensity scales
Focal Mechanisms
Fault Plane Solutions of Earthquakes, Northeast India
Kayal et al., 2006
Other topics
• Hazards and damaging effects,
• prediction and forecasting,
• instruments, networks, arrays, etc.