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Seismic Waves and Sources (Paperback, Softcover reprint of the original 1st ed. 1981)
Loot Price: R4,688
Discovery Miles 46 880
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Seismic Waves and Sources (Paperback, Softcover reprint of the original 1st ed. 1981)
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Earthquakes come and go as they please, leaving behind them trails
of destruc tion and casualties. Although their occurrence is little
affected by what we do or think, it is the task of earth scientists
to keep studying them from all possible angles until ways and means
are found to divert, forecast, and eventually control them. In
ancient times people were awestruck by singular geophysical events,
which were attributed to supernatural powers. It was recognized
only in 1760 that earthquakes originated within the earth. A
hundred years later, first systematic attempts were made to apply
physical principles to study them. During the next century
scientists accumulated knowledge about the effects of earthquakes,
their geographic patterns, the waves emitted by them, and the
internal constitution of the earth. During the past 20 years,
seismology has made a tremendous progress, mainly because of the
advent of modern computers and improvements in data acquisi tion
systems, which are now capable of digital and analog recording of
ground motion over a frequency range of five orders of magnitude.
These technologic developments have enabled seismologists to make
measurements with far greater precision and sophistication than was
previously possible. Advanced computational analyses have been
applied to high-quality data and elaborate theoretical models have
been devised to interpret them. As a result, far reaching advances
in our knowledge of the earth's structure and the nature of
earthquake sources have occurred."
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