Age of Palos Verdes submarine debris avalanche, southern California

Normark, William R.; McGann, Mary; Sliter, Ray W.

doi:10.1016/s0025-3227(03)00308-6

Cited by 51 publications

(38 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since 1999, the west coast of the USA has received a great deal more focussed attention on SMF tsunami hazard (e.g. Eichhubl et al, 2002;Lee et al, 2003Lee et al, , 2004Bohannon and Gardner, 2004;Locat et al, 2004;Normark et al, 2004;Greene et al, 2005). One of the largest marine survey programmes ever carried out over a SMF has been off Norway to investigate the potential hazard from a future failure in the area of the Storegga Landslide, although the motivation for the research was mainly to do with the safe extraction of gas from the underlying Ormen Lange Gasfield (e.g.…”

Section: Discussionmentioning

confidence: 99%

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

Tappin

Watts²,

Grilli

2008

Nat. Hazards Earth Syst. Sci.

242

150

View full text Add to dashboard Cite

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 arCorrespondence to: D. R. Tappin (drta@bgs.ac.uk) chitecture 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.

show abstract

Section: Discussionmentioning

confidence: 99%

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

Tappin

Watts²,

Grilli

2008

Nat. Hazards Earth Syst. Sci.

242

150

View full text Add to dashboard Cite

show abstract

“…Older failure deposits lie below one of the lobes and have been dated at 75, 130, and 164 ka, indicating a recurrence interval of failure of about 50 ka for this lobe (Lee et al, 2004). The Palos Verdes debris avalanche, off Los Angeles (Bohannon and Gardner, 2004;Normark et al, 2004) has a deposit with an area of about 50 km 2 . The most recent major failure of the Palos Verdes debris avalanche has been dated at 7.5 ka , but seismic-reflection profiles indicate that numerous failures have occurred at the location of this failure zone in the past.…”

Section: Other Large Failures Worldwidementioning

confidence: 99%

“…To properly date a landslide, one generally must have a sample of sediment from immediately above either the landslide debris itself or the surface along which sediment has been completely removed (landslide scar). Datable materials (e.g., calcareous microfossils, mollusks) from within the sediment above the slide are separated and dated using a variety of techniques, among which radiocarbon methods are most popular (e.g., Normark et al, 2004). For very recent (last 100 yr) landslides, measurements of short-half-life radioisotopes such as 210 Pb or 137 Cs can be used (Lee et al, 2007).…”

Section: Techniquesmentioning

confidence: 99%

Timing of occurrence of large submarine landslides on the Atlantic Ocean margin

2009

View full text Add to dashboard Cite

“…It is the largest late Quaternary SMF, with a volume of 0.34 km 3 , in the inner California Borderland basins. It is dated at 7.5 ky (Normark et al, 2004). Modelling indicates that it was large enough to generate a significant tsunami that would inundate the adjacent coastline (Locat et al, 2004).…”

Section: 14mentioning

confidence: 99%

Submarine Mass Failures as Tsunami Sources – their Climate Control

Tappin

2012

Climate Forcing of Geological Hazards

View full text Add to dashboard Cite

Age of Palos Verdes submarine debris avalanche, southern California

Cited by 51 publications

References 18 publications

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

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

Timing of occurrence of large submarine landslides on the Atlantic Ocean margin

Submarine Mass Failures as Tsunami Sources – their Climate Control

Contact Info

Product

Resources

About