Pg Attenuation Tomography within the Northern Middle East

Bao X., Sandvol E., Zor E., Sakin S., Mohamad R., Goek R., ...More

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, vol.101, no.4, pp.1496-1506, 2011 (SCI-Expanded) identifier identifier


A seismic attenuation map of regional phase Pg is constructed for the northern Middle East using two-station frequency-dependent Q measurements and seismic attenuation tomography. Pg is widely used in source discrimination, but its attenuation behavior is not well understood. We investigate the functional form of the geometrical spreading of Pg for both uniform and more complex seismic velocity structures. We find that there is significant trade-off between attenuation and geometrical spreading of Pg, and we quantify this trade-off to interpret the observed Pg attenuation in the Middle East.