28 June 2021 to 2 July 2021
Europe/Vienna timezone

P-wave arrival-time tomography of the Middle East

29 Jun 2021, 17:05
Location 2 (Online)

Location 2


Oral T1.2 - The Solid Earth and its Structure T1.2 - The Solid Earth and its Structure


Ms Ebru Bozdag (Colorado School of Mines, CO, USA)


High-resolution tomographic images of the MiddleEastern region are essential to accurately locate ground motion events during nuclear monitoring programs. The purpose of this study is to retrieve detailed models down to lowermantle beneath the Middle Eastern region using a set of reliable regionally observed teleseismic P arrival times from the ISC-EHB bulletin (Engdahl et al., 1998). Our current inversion results are consistent with the previous regional tomographic studies. In checkerboard tests of cell dimension as low as $\sim$ $2.4^{\circ}$($\sim$ 280 km at surface) are well recovered down to a 1000 km depth beneath the Anatolian plateau where we currently have the densest coverage with ISC data. The Caucasus region and northern parts of the Iranian plateau shows good recovery of $\pm4\%$ Vp perturbation amplitudes at depths $\sim$ 70 – 135 km. There is fair recovery for a minimum of $\sim$ $2.4^{\circ}$ cell size beneath the Iranian Plateau, Zagros mountain region, Persian gulf, and northeast Iraq. We are able to further improve coverage especially down to lithospheric depths within the Arabian peninsula using first arrival times measured from waveform data collected from regional networks.
The ultimate goal is to perform full-waveform inversion of the region constrained by the constructed P-wave model.

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Seismic Imaging of Middle Eastern crust and mantle

Primary authors

Ms Ebru Bozdag (Colorado School of Mines, CO, USA) Ms Manawaduge Susini Desilva (Colorado School of Mines, CO, USA) Mr Guust Nolet (GeoAZUR, Université de Nice Sophia Antipolis, France) Ms Rengin Gok (Lawrence Livermore National Laboratory (LLNL), Livermore, CA, USA) Mr Ahmed Ali (Saudi Geological Survey, Saudi Arabia) Mr Yahya Tarabulsi (Saudi Geological Survey, Saudi Arabia)

Presentation materials