Universität zu Köln

Schwellenbach, Iris, Hinzen, Klaus-G., Petersen, Gesa Maria and Bottari, Carla (2020). Combined use of refraction seismic, MASW, and ambient noise array measurements to determine the near-surface velocity structure in the Selinunte Archaeological Park, SW Sicily. J. Seismol., 24 (4). S. 753 - 777. DORDRECHT: SPRINGER. ISSN 1573-157X

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Abstract

Seismic refraction, multichannel analysis of surface waves (MASW) and ambient noise array measurements using the wireless array analysis (WARAN) system were applied to acquire near-surface profiles of seismic velocities in the Selinunte Archaeological Park. This ancient city is famous for numerous temples, which according to the literature, were destroyed by at least two earthquakes in antiquity. The morphology of the archeological park is affected by two rivers which in combination with the temple remains suggests three study sites. We determined the subsurface velocity at these three locations as essential information for further studies of the response of the temple structures to earthquake ground motions. The stratigraphy of the site indicates that low-velocity layers might exist. Seismic refraction profiles with 69 m spread and 24 geophones were employed during the active seismic experiments. The measured P-wave velocities of the top two layers were used as a constraint during the inversion of dispersion relations from the MASW and WARAN data. The reliability of the velocity profiles was tested by forward calculation of synthetic seismograms. P-wave velocities which were not well constraint throughout the dispersion curve inversions were adjusted through suitable Poisson's ratios based on the well constraint S-velocities. The combined use of the three different kinds of measurements and multi-mode interpretation of the dispersion curves revealed velocity profiles including low-velocity layers which are supported by de-amplification observed in ratios of horizontal and vertical components of noise spectra.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schwellenbach, Iris UNSPECIFIED UNSPECIFIED UNSPECIFIED Hinzen, Klaus-G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Petersen, Gesa Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED Bottari, Carla UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-343759
DOI:	10.1007/s10950-020-09909-4
Journal or Publication Title:	J. Seismol.
Volume:	24
Number:	4
Page Range:	S. 753 - 777
Date:	2020
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-157X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SHALLOW STRUCTURE; ACTIVE TECTONICS; WAVE-FIELDS; INVERSION; EARTHQUAKES; VIBRATIONS; RAYLEIGH; TIRYNS; DAMAGE; BASIN Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34375