Publication Date:
2017-04-04
Description:
The relative contribution of intrinsic (Q−1
i ) and scattering (Q−1
s ) attenuation to seismic wave attenuation
was estimated for the Garwhal–Kumaun Himalayas using Multiple Lapse Time Window Analysis
(MLTWA) method under the assumption of isotropic scattering. Local earthquake data recorded by an
array operated by Wadia Institute of Himalayan Geology (WIHG), India was used for this purpose. It is
observed that scattering attenuation primarily contributes to seismic wave attenuation in this region
and its value is much higher compared to that of intrinsic attenuation at around 1Hz frequency. As frequency
increases the relative contribution of scattering attenuation to total attenuation starts decreasing.
However, as seismic albedo is higher than 0.5 for all the frequencies considered, it is concluded that the
medium here is highly heterogeneous in nature
Description:
Published
Description:
7-15
Description:
3.1. Fisica dei terremoti
Description:
JCR Journal
Description:
reserved
Keywords:
Garwhal–Kumaun Himalayas
;
Scattering attenuation
;
Intrinsic attenuation
;
Seismic albedo
;
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
