Tsunami potential source in the eastern Sea of Marmara (NW Turkey), along the North Anatolian Fault system

被引:3
作者
Gasperini, Luca [1 ]
Zaniboni, Filippo [2 ,4 ]
Armigliato, Alberto [2 ]
Tinti, Stefano [2 ]
Pagnoni, Gianluca [2 ]
Ozeren, Mehmet Sinan [3 ]
Ligi, Marco [1 ]
Natali, Francesca [1 ]
Polonia, Alina [1 ]
机构
[1] CNR, Marine Geol Sect, Inst Marine Sci ISMAR, Bologna, Italy
[2] Univ Bologna, Dept Phys & Astron Augusto Righi, Bologna, Italy
[3] Istanbul Tech Univ, Istanbul, Turkey
[4] Natl Inst Geophys & Volcanol INGV, Bologna, Italy
关键词
Landslide; Tsunamis; Sea of Marmara; Risk; Assessment; North Anatolian Fault; Earthquakes; IZMIT BAY TURKEY; SUBMARINE LANDSLIDE; AUGUST; 17; EARTHQUAKE; MODEL; HAZARD; SLIDE; GENERATION; TURBIDITES; GEOMETRY;
D O I
10.1007/s10346-022-01929-0
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Based on morphobathymetric and seismic reflection data, we studied a large landslide body from the eastern Sea of Marmara (NW Turkey), along the main strand of the North Anatolian Fault, one of the most seismically active geological structures on Earth. Due to its location and dimensions, the sliding body may cause tsunamis in case of failure possibly induced by an earthquake. This could affect heavily the coasts of the Sea of Marmara and the densely populated Istanbul Metropolitan area, with its exposed cultural heritage assets. After a geological and geometrical description of the landslide, thanks to high-resolution marine geophysical data, we simulated numerically possible effects of its massive mobilization along a basal displacement surface. Results, within significant uncertainties linked to dimensions and kinematics of the sliding mass, suggest generation of tsunamis exceeding 15-20 m along a broad coastal sector of the eastern Sea of Marmara. Although creeping processes or partial collapse of the landslide body could lower the associated tsunami risk, its detection stresses the need for collecting more marine geological/geophysical data in the region to better constrain hazards and feasibility of specific emergency plans.
引用
收藏
页码:2295 / 2310
页数:16
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