Permanent
Strong Motion Array
A large number of
observational studies have striven to evaluate the importance of the
different factors involved in site response of soft soils. However, there is
a long way to go to reach a point where site effects would be incorporated
in future aseismic design codes. One important reason is the very few cases
in which there are available high quality earthquake observations and
detailed knowledge of subsoil geometry and soil properties. In order to
assist the investigation of different open problems in earthquake
engineering and engineering seismology, including -of course- site effects,
it is deemed necessary to extent the already existing permanent strong
motion network.
The final layout of this network will be
comprised of 15 surface high resolution accelerographs in a quasi cross-shaped
array covering the central part of the Mygdonian basin, a downhole array at
the center of the valley at site TST and another one at
site PRO at the northern edge of the array.
The down-hole array at
TST (center of the valley consists of:
 |
a 18-channel device Mt.Whitney with GPS
|
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Telecommunication with stable phone line
made by the Organization of National Telecom-munications of Greece |
|
a 3D surface accelerometer which
substituted an existing ETNA |
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an existing DH–17m accelerometer
|
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a new DH accelerometer at –40m
|
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an existing DH sensor at –72m (retrieval &
reparation) |
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two new DH accelerometers at –140m and
–200m depths |
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A new pore-pressure probe at –10 m depth
|
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An existing pore-pressure probe at –17m
depth |
