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The data in this directory is provided by ERD (Earthquake
Research Department of the Ministry of Public Works and Reconstruction,
Ankara, Turkey).
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The data covers the 17 August 1999 Izmit earthquake
main-shock and aftershocks and the 12 November Duzce earthquake
main-shock.
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The original data sets were provided in ASCII format.
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All data are acceleration data. The units are in mG
(0.001 g).
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Each new ASCII data file contains three component
of recorded motion for each station and each event. Each component
is separated and identifiable from the other two by a short header
that indicates, (a) the component orientation, (b) total length
of record, (c) sampling interval, and (d) the unit of motion (cm/s
or cm/s/s).
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The file names have been changed [e.g. 08221431.ylv].
The first two numbers refer to the month (08), the next pairs of
numbers refer to day (22), hour (14) and minute (31) respectively.
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The general geotechnical descriptions of the stations
are provided by ERD staff.
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The coordinates and related station descriptions have
been compiled from the original record files.
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No corrections of data signals have been made. Spectral
values are not computed or provided.
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Since detailed instrumental information were not available
in the original records, they could not be included in the tables.
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It is noted that at least for some events and at least
for two stations, the records are similar. The researcher is urged
to make the comparative judgment. We have not been able to determine
how this happened.
