Descr: Deploy 15 DAS's w/ SP sensors along the Anatolian Coast west of Istanbul, facing on the Sea of Marmara. Record continuously for 30-60 days at each site, move 2-4 sites per week, crawling across the at-risk urban area in 6 months. Desired site spacing 1-2 km, concentrating on the sedimentary units that have shown greatest potential for damage / amplification.