On several recordings of linear seismometer arrays crossing the Arava
Fault (AF) in the Middle East, we see prominent wave trains emerging
from in-fault explosions which we interpret as waves being guided
by a fault zone related low-velocity layer. The AF is located in
the Arava Valley and is considered the principal active fault of
the mainly N-S striking Dead Sea Transform System in this section.
Observations of these wave trains are confined to certain segments
of the receiver lines and occur only for particular shot locations.
They exhibit large amplitudes and are almost monochromatic. We model
them by a two-dimensional (2-D) analytical solution for the scalar
wave field in models with a vertical waveguide embedded in two quarter
spaces. A hybrid search scheme combining genetic algorithm and a
local random search is employed to explore the multimodal parameter
space. Resolution is investigated by synthetic tests. The observations
are adequately fit by models with a narrow, only 3-12 m wide waveguide
with S wave velocity reduced by 10-60\% of the surrounding rock.
We relate this vertical low-velocity layer with the damage zone of
the AF since the location of receivers observing and of shots generating
the guided waves, respectively, match with the surface trace of the
fault. The thickness of the damage zone of the AF, at least at shallow
depths, seems to be much smaller than in other major fault zones.
This could be due to less total slip on this fault.
%0 Journal Article
%1 haberland_etal:2003
%A Haberland, C.
%A Agnon, A.
%A El-Kelani, R.
%A Maercklin, N.
%A Qabbani, I.
%A Rümpker, G.
%A Ryberg, T.
%A Scherbaum, F.
%A Weber, M.
%D 2003
%J Journal of Geophysical Research
%K geophysics myown seismics
%N B7
%P 2342
%R 10.1029/2002JB002309
%T Modeling of seismic guided waves at the Dead Sea Transform
%U http://dx.doi.org/10.1029/2002JB002309
%V 108
%X On several recordings of linear seismometer arrays crossing the Arava
Fault (AF) in the Middle East, we see prominent wave trains emerging
from in-fault explosions which we interpret as waves being guided
by a fault zone related low-velocity layer. The AF is located in
the Arava Valley and is considered the principal active fault of
the mainly N-S striking Dead Sea Transform System in this section.
Observations of these wave trains are confined to certain segments
of the receiver lines and occur only for particular shot locations.
They exhibit large amplitudes and are almost monochromatic. We model
them by a two-dimensional (2-D) analytical solution for the scalar
wave field in models with a vertical waveguide embedded in two quarter
spaces. A hybrid search scheme combining genetic algorithm and a
local random search is employed to explore the multimodal parameter
space. Resolution is investigated by synthetic tests. The observations
are adequately fit by models with a narrow, only 3-12 m wide waveguide
with S wave velocity reduced by 10-60\% of the surrounding rock.
We relate this vertical low-velocity layer with the damage zone of
the AF since the location of receivers observing and of shots generating
the guided waves, respectively, match with the surface trace of the
fault. The thickness of the damage zone of the AF, at least at shallow
depths, seems to be much smaller than in other major fault zones.
This could be due to less total slip on this fault.
@article{haberland_etal:2003,
abstract = {On several recordings of linear seismometer arrays crossing the Arava
Fault (AF) in the Middle East, we see prominent wave trains emerging
from in-fault explosions which we interpret as waves being guided
by a fault zone related low-velocity layer. The AF is located in
the Arava Valley and is considered the principal active fault of
the mainly N-S striking Dead Sea Transform System in this section.
Observations of these wave trains are confined to certain segments
of the receiver lines and occur only for particular shot locations.
They exhibit large amplitudes and are almost monochromatic. We model
them by a two-dimensional (2-D) analytical solution for the scalar
wave field in models with a vertical waveguide embedded in two quarter
spaces. A hybrid search scheme combining genetic algorithm and a
local random search is employed to explore the multimodal parameter
space. Resolution is investigated by synthetic tests. The observations
are adequately fit by models with a narrow, only 3-12 m wide waveguide
with S wave velocity reduced by 10-60\% of the surrounding rock.
We relate this vertical low-velocity layer with the damage zone of
the AF since the location of receivers observing and of shots generating
the guided waves, respectively, match with the surface trace of the
fault. The thickness of the damage zone of the AF, at least at shallow
depths, seems to be much smaller than in other major fault zones.
This could be due to less total slip on this fault.},
added-at = {2012-09-01T13:08:21.000+0200},
author = {Haberland, C. and Agnon, A. and El-Kelani, R. and Maercklin, N. and Qabbani, I. and R\"{u}mpker, G. and Ryberg, T. and Scherbaum, F. and Weber, M.},
biburl = {https://www.bibsonomy.org/bibtex/2bf879c0c574e5ed3b4fd27764f23f552/nilsma},
day = 19,
doi = {10.1029/2002JB002309},
interhash = {f205e3e4ac7367af207ea0ad7ae2fbc0},
intrahash = {bf879c0c574e5ed3b4fd27764f23f552},
issn = {0148-0227},
journal = {Journal of Geophysical Research},
keywords = {geophysics myown seismics},
month = jul,
number = {B7},
pages = 2342,
timestamp = {2021-02-09T13:26:58.000+0100},
title = {Modeling of seismic guided waves at the Dead Sea Transform},
url = {http://dx.doi.org/10.1029/2002JB002309},
volume = 108,
year = 2003
}