DOI: 10.1016/j.earscirev.2019.02.001
论文题名: Empirical constraints on magnitude-distance relationships for seismically-induced submarine tsunamigenic landslides
作者: Salamon A. ; Di Manna P.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 191 起始页码: 66
结束页码: 92
语种: 英语
中文关键词: Bathymetry
; Inland earthquake
; Magnitude-distance relationships
; Seismogenic fault
; Submarine landslide tsunami
; Tsunami early warning
英文关键词: bathymetry
; early warning system
; earthquake epicenter
; earthquake magnitude
; earthquake trigger
; empirical analysis
; fault
; seismicity
; submarine landslide
; tsunami
英文摘要: Seismically-Induced submarine Landslide Tsunamis (here called SILTs) attract growing attention due to their unique setting, damage potential and short warning time. A question of key importance, especially for tsunami early warning, is: how far can an earthquake trigger a tsunamigenic slump? Here we investigate the relationships between earthquake magnitude and the maximal distance between the seismogenic fault and the tsunamigenic slumps (Rf) and between the earthquake epicenter and the slump (Re), and propose empirical constraints on these Magnitude-Distance (M-D) relations. The 49 identified SILTs are spread in various seismotectonic and bathymetric settings in different seas around the globe. We found that the maximal distance of the tsunamigenic submarine landslide from the parent earthquake grows with the magnitude and is bounded by an envelope constrained by Mw as low as 4.9 for several kilometers (the 1968, Liguria Coast, Italy) and as far as 250 km for Mw 7.7 (the 1819, Rann of Kachchh, India). Higher earthquake magnitudes also produce SILTs, seemingly distances lower than 250 km, however, it is suspected that the available data is limited and unable to reflect the true nature of SILT's generation. Generalized empirical relations between the earthquake magnitude (Mw) and the maximal distance from the seismogenic fault to its generated SILT (Rf, in km) are: Log Rf = −1.17 + 0.49 Mw (R 2 = 0.78). The empirical distance between the earthquake epicenter and the corresponding tsunamigenic slump (Re, in km), is: Log Re = −0.87 + 0.45 Mw (R 2 = 0.83). Although many earthquakes within the M-D bounding envelope did not produce tsunamis, the ‘successful’ events still enable the delineation of the M-D zone vulnerable to tsunami generation, which, in turn, can be applied to tsunami early warning procedures. This is particularly important for near-coast inland earthquakes, as their tsunamigenic potential might be overlooked. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165921
Appears in Collections: 气候变化与战略
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作者单位: Geological Survey of Israel, 32 Leibowitz St, Jerusalem, 9371234, Israel; ISPRA (Istituto Superiore per la Protezione e la Ricerca Ambientale), Geological Survey of Italy, Via Vitaliano Brancati 48, Rome, 00144, Italy
Recommended Citation:
Salamon A.,Di Manna P.. Empirical constraints on magnitude-distance relationships for seismically-induced submarine tsunamigenic landslides[J]. Earth Science Reviews,2019-01-01,191