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.