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• W2945458997 abstract "We investigate attenuation scattering and loss properties in Souss basin (SW of High-Atlas) as a transition zone between the High and Anti Atlas ranges. This district consists in a thinned crustal patch with shallow seismicity and loose sedimentary trenches that perform an important contribution to augment seismic attenuation. So far, no coda waves approach in our knowledge have been used to draw satisfying outputs about the attenuation properties in the region. Therefore, this update suggests to correlate the lateral changes of seismic attenuation to different characteristics and asperities i.e. seismic activity, crustal age and thickness, heat flow, and ground deformation rate. To do so, we analysed coda waves derived from waveform data of more than 23 local earthquakes from seven broadband seismometers recorded during 2010–2012 period. As a starter, we utilized the backscattering model which defines the seismic attenuation as inversely proportional to quality factor by the equation (A=1Qc). Qc estimates were deducted at various central frequency bands 1.5, 3.0, 6.0, 9.0, 12.0 and 18.0 Hz according to different lapses times. The estimated average frequency dependence quality factor gives relation Qc=120f1,01, while the average Qc values vary from 149 at 1.5 Hz to 1895 at 18 Hz central frequencies. We observed an intimate dependence between quality factor and frequency ranges, which reflects the complexity of geological/geophysical pattern in the Souss basin and the presence of a variety of heterogeneities within the underlying crust." @default.
• W2945458997 created "2019-05-29" @default.
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• W2945458997 date "2019-07-01" @default.
• W2945458997 modified "2023-09-23" @default.
• W2945458997 title "Attenuation of coda waves in the SW of High-Atlas area, Morocco" @default.
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• W2945458997 doi "https://doi.org/10.1016/j.geog.2019.05.001" @default.
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