[图书馆]EARTHQUAKE DYNAMICS AND THE PREDICTION OF STRONG GROUND [复制链接]

A large number of earthquakes have been modelled in detail using seismological, geological and 61>.vT8P  
geodetic information. Several common traits have been found for earthquakes kinematics at vhW2PzHFRi  
periods longer than 3s. At these frequencies, all large earthquakes (M>7) appear complex with Tod&&T'UW  
highly variable slip, and propagate with rupture velocities close to about 80 % of the shear wave F=e8IUr  
speed. Starting from these kinematic inversions, it is possible to use numerical wave propagation ci.+pF  
models in order to estimate the complete radiated field including near and far field effects. 9gDkTYkj  
Radiation can be separated into two main components: a near field term responsible for the socalled uAJx.>$b  
fling steps due to permanent, geodetic offsets; and the far field that produces pulse like T{.pM4Hd  
motions. Using seismological scaling relations it is possible to explain the main features of T|eu  
displacement spectra using classical seismological models at long periods. Seismic simulations ColV8oVnU  
may now be extended to the frequencies up to a few Hz by means of dynamic rupture propagation, @[<><uTH  
where rupture is simulated starting from the kinematic models. In this talk I will review the main m)t;9J5  
results obtained so far and the new avenues of research that have been opened thanks to new near `l ^9/_g'6  
field earthquake data and the ability to simulate increasingly complex and realistic seismic p!7FpxZY  
ruptures in a computer.