Academic Journals Database
Disseminating quality controlled scientific knowledge

PREDICTION OF SLUMP GENERATED TSUNAMIS: THE JULY 17TH 1998 PAPUA NEW GUINEA EVENT

ADD TO MY LIST
 
Author(s): David R. Tappin | Philip Watts | Gary M. McMurtry | Yves Lafoy | Takeshi Matsumoto

Journal: Science of Tsunami Hazards
ISSN 8755-6839

Volume: 20;
Issue: 4;
Start page: 222;
Date: 2002;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: tsunami | tsunamis | Papua New Guinea 1998 tsunami | slump generated tsunamis

ABSTRACT
The local tsunami of July 17th 1998 that struck Papua New Guinea is most probably the result of an offshore sediment slump. This conclusion is based on multibeam bathymetric data, visual ob- servation of the seabed, and sediment piston cores. Offshore data has been utilised to interpret the tectonic framework of the area off northern PNG, the local sedimentary regime and, from this and onshore evidence of sediment dispersal a model of sediment failure has been con- structed. Utilising the seabed observations, the distribution of seabed failure has been mapped and the tsunami source location accurately identified. Fluid expulsion from the sediment has been assessed from the presence of authigenic carbonates and chemosynthetic communities. It is proposed that multibeam bathymetry, sediment sampling, and visual seabed observation are critical in the identification of coastlines vulnerable to tsunami attack and, in combination with onshore studies and numerical simulations, tsunami prone areas may be identified. Ultimately, as more case studies are undertaken, underwater landslide prediction may at last become possi- ble.
Why do you need a reservation system?      Affiliate Program