Abstract
A shallow high-resolution seismic reflection survey was carried out
at the Evrona playa site in the southern Arava valley, Israel. The
aim of the survey was to detect and map faults in the shallow subsurface
(upper 100-150 m) and establish the relationship of the morphological
features revealed by aerial photographs and surface geological mapping
with the faults detected in the subsurface. The survey included three
seismic lines shot using the P-wave technique and one SH-wave line,
which overlapped one of the P-wave lines. The seismic energy source
on all the lines was a sledge hammer. The acquired reflection data
were of good quality and did not require special processing efforts.
The seismic sections along the lines show a sequence of reflected
events within the 8-150 m range. At several locations, continuity
of the events is interrupted by a system of faults. These faults
form flower structures apparently related to strike-slip motions
typical of the region. Comparison of the faults mapped on the seismic
sections with those expressed by surface morphological features generally
show good correspondence. The results of the seismic survey provide
important information for the study of paleoseismicity and seismic
hazards in the investigated area.
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