publication Journal Article 2020 Published in: https://link.springer.com/article/10.1007/s12517-019-5017-5 Integrated use of electrical resistivity tomography and ground penetration radar for identifying subsurface sinkholes in Rufa Graben, Central Riyadh Mogren, Saad . 2020 Rufa Graben ERT . GPR . Sinkholes Karst Publication Work Type paper Magazine \ Newspaper Arabian Journal of Geosciences more of publication Integrated use of electrical resistivity tomography and ground penetration radar for identifying subsurface sinkholes in Rufa Graben, Central Riyadh by Saad Mogren 2020 Engineering bedrock depth estimation and ground response analysis of the northern Jeddah urban area, western Saudi Arabia by Saad Mogren 2020 Incipient status of dyke intrusion in top crust – evidences from the Al-Ays 2009 earthquake swarm, Harrat Lunayyir, SW Saudi Arabia The 2009 earthquake-swarm in the Al-Ays volcanic zone in Harrat-Lunayyir in NW Saudi-Arabia is unique because of its intense character and focal-depth distribution at two depth bands (… by Basab Mukhopadhyay , Saad Mogren , Manoj Mukhopadhyay & Sujit Dasgupta 2013