Geotechnical Analysis Of A Submarine Slump, Eureka, California

1981 ◽  
Author(s):  
Homa J. Lee ◽  
Brian D. Edwards ◽  
Michael E. Field
Keyword(s):  
Submarine Slump

scholarly journals Effects of rotational submarine slump dynamics on tsunami genesis: new insight from idealized models and the 1929 Grand Banks event

2020 ◽  
Vol 500 (1) ◽  
pp. 41-61 ◽  
Author(s):  
T. Zengaffinen ◽  
F. Løvholt ◽  
G. K. Pedersen ◽  
C. B. Harbitz
Keyword(s):  
Source Information ◽  
Physical Processes ◽  
Viscoplastic Model ◽  
Grand Banks ◽  
Rotational Kinematics ◽  
Short Run ◽  
Submarine Slump ◽  
Geological Source ◽  
Insight Into

AbstractSediment slumps are known to have generated important tsunamis such as the 1998 Papua New Guinea (PNG) and the 1929 Grand Banks events. Tsunami modellers commonly use solid blocks with short run-out distances to simulate these slumps. While such methods have the obvious advantage of being simple to use, they offer little or no insight into physical processes that drive the events. The importance of rotational slump motion to tsunamigenic potential is demonstrated in this study by employing a viscoplastic landslide model with Herschel–Bulkley rheology. A large number of simulations for different material properties and landslide configurations are carried out to link the slump's deformation, rheology, its translational and rotational kinematics, to its tsunami genesis. The yield strength of the slump is shown to be the primary material property that determines the tsunami genesis. This viscoplastic model is further employed to simulate the 1929 Grand Banks tsunami using updated geological source information. The results of this case study suggest that the viscoplastic model can be used to simulate complex slump-induced tsunami. The simulations of the 1929 Grand Banks event also indicate that a pure slump mechanism is more tsunamigenic than a corresponding translational landslide mechanism.

scholarly journals The Papua New Guinea tsunami of 17 July 1998: anatomy of a catastrophic event

2008 ◽  
Vol 8 (2) ◽  
pp. 243-266 ◽  
Author(s):  
D. R. Tappin ◽  
P. Watts ◽  
S. T. Grilli
Keyword(s):  
Papua New Guinea ◽  
Large Scale ◽  
New Guinea ◽  
Geological Data ◽  
Data Set ◽  
Comprehensive Data ◽  
International Programme ◽  
Submarine Slump ◽  
High Degree ◽  
First Time

Abstract. The Papua New Guinea (PNG) tsunami of July 1998 was a seminal event because it demonstrated that relatively small and relatively deepwater Submarine Mass Failures (SMFs) can cause devastating local tsunamis that strike without warning. There is a comprehensive data set that proves this event was caused by a submarine slump. Yet, the source of the tsunami has remained controversial. This controversy is attributed to several causes. Before the PNG event, it was questionable as to whether SMFs could cause devastating tsunamis. As a result, only limited modelling of SMFs as tsunami sources had been undertaken, and these excluded slumps. The results of these models were that SMFs in general were not considered to be a potential source of catastrophic tsunamis. To effectively model a SMF requires fairly detailed geological data, and these too had been lacking. In addition, qualitative data, such as evidence from survivors, tended to be disregarded in assessing alternative tsunami sources. The use of marine geological data to identify areas of recent submarine failure was not widely applied. The disastrous loss of life caused by the PNG tsunami resulted in a major investigation into the area offshore of the devastated coastline, with five marine expeditions taking place. This was the first time that a focussed, large-scale, international programme of marine surveying had taken place so soon after a major tsunami. It was also the first time that such a comprehensive data set became the basis for tsunami simulations. The use of marine mapping subsequently led to a larger involvement of marine geologists in the study of tsunamis, expanding the knowledge base of those studying the threat from SMF hazards. This paper provides an overview of the PNG tsunami and its impact on tsunami science. It presents revised interpretations of the slump architecture based on new seabed relief images and, using these, the most comprehensive tsunami simulation of the PNG event to date. Simulation results explain the measured runups to a high degree. The PNG tsunami has made a major impact on tsunami science. It is one of the most studied SMF tsunamis, yet it remains the only one known of its type: a slump.

Geological And Geotechnical Analysis Of a Submarine Slump, California Borderland

1980 ◽  
Author(s):  
Brian D. Edwards ◽  
Michael E. Field ◽  
Edward C. Clukey
Keyword(s):  
California Borderland ◽  
Submarine Slump

Submarine slump folds and gravitational normal faults in Quaternary sediments on the northern slope of the Derbent Basin (Caspian Sea)

2008 ◽  
Vol 420 (1) ◽  
pp. 681-685 ◽  
Author(s):  
L. I. Lobkovskii ◽  
V. E. Verzhbitskii ◽  
L. R. Merklin ◽  
A. G. Roslyakov ◽  
A. S. Polyakov ◽  
...  
Keyword(s):  
Caspian Sea ◽  
Normal Faults ◽  
Northern Slope ◽  
Quaternary Sediments ◽  
Submarine Slump

Large Submarine Slump Off Eureka, California: ABSTRACT

AAPG Bulletin ◽  
1981 ◽  
Vol 65 ◽  
Author(s):  
Michael E. Field, Brian D. Edwards
Keyword(s):  
Submarine Slump
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