Seismology in the sense of earthquake research is no longer
exclusively a matter of earthquake recording and the analysis of
seismograms. The tremendous progress in earth- quake dynamic
research, the development of sophisticated technologies, the advent
of the space age, and the call for reduction of the earthquake
hazards and for disaster pre- vention programs have spurred
interdisciplinary research to discover the earthquake generating
processes. The progress in observing the physical phenomena of
earthquake generating processes and the identification of
earthquake precursors among these phe nomena have placed research
on the field of predicting earthquakes on the solid basis of exact
earth sciences. The measurement of the phenomena of slow-motion
dynamics such as the move- ment of tectonic plates, the
accumulation of strain, displacements observed in fault zones, and
the temporal variations of physical rock properties fall into the
domain of geodesists and geophysicists rather than seismologists.
However, seismology in the broadest interpretation of earthquake
research requires all observable phenomena of slow-motion dynamics
in order to constrain models of focal mechanism and to penetrate
deeper into earthquake source physics. Interdisciplinary research
is on the way to open us new dimensions in earthquake and
earthquake predic- tion research.
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