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EARTHQUAKE
RESEARCH INSTITUTE
UNIVERSITY OF TOKYO
TOKYO, JAPAN
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Name in the CD : ERI_KUDO_JAPAN
DATA
PARTICULARS
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The data by Professor Kazuyoshi Kudo of Earthquake Research Institute
of University of Tokyo and his colleagues were recorded with Japanese
manufactured data-loggers.
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All recorded data are acceleration units (cm/s/s).
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Detailed descriptions of the (a) type of instrument used, (b) stations
and (c) processing of recorded data are in the document provided
by Prof. K. Kudo included in the CD-ROM.
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Accordingly, data processing has been done (by Professor K. Kudo) as
follows: (a) baseline correction with average of 100 samples (during one second)
prior to the P-wave arrival and low pass Butterworth filter at cut-off
frequency of 25 Hz and shunt one of 40 Hz, and (b) only one exception
of processing is the file GLA19990912213736.DAT. The sampling of
this file was 50 Hz, therefore, cutoff and shunt frequencies of
12.5 and 20 Hz were used.
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