source: production/pt_hedland_2006/report/tsunami_scenario.tex @ 2983

Last change on this file since 2983 was 2983, checked in by sexton, 19 years ago

updates to report

File size: 1.6 KB
Line 
1The tsunamigenic event used for this study is one used
2to develop the preliminary tsunami hazard assessment which
3was delivered to FESA in September 2005 (ref Burbidge, D. and
4Cummins, P. 2005). In that assessment, a suite of
5tsunami were evenly spaced along the Sunda Arc subduction zone and there
6was no consideration of likelihood. Other sources were not considered, such
7as intra-plate earthquakes near the WA coast, volcanoes, landslides
8or asteroids. The preliminary assessment argued
9that the maximum magnitude of earthquakes off Java is at least 8.5 and
10could potentially be as high as 9.
11
12Current studies underway in GA are building probabilistic
13models to develop a more complete tsunami hazard assessment
14for the Sunda Arc subduction zone. (This is
15due for completion in late 2006.) In the preliminary assessment for
16example, it was argued that while Mw 7 and 8 earthquakes are expected
17to occur with a greater frequency, they are likely to pose a comparatively
18low and localised hazard to WA.
19
20FESA are interested in the ``most frequent worst case scenario''. Whilst
21we cannot determine what that event may be, the Mw 9 event provides
22a plausible worst case scenario.
23
24The following figure is taken from the preliminary assessment and
25shows the maximum wave height up to the 50m contour for a Mw 9 event off
26the coast of Java. It is this event which provides the source to the
27inundation modelling presented in the following section.
28
29
30
31\begin{figure}[hbt]
32
33  \centerline{ \includegraphics[width=100mm, height=75mm]{../report_figures/mw9.jpg}}
34
35  \caption{Maximum wave height (in cms) for a Mw 9 event off the
36coast of Java}
37  \label{fig:mw9}
38\end{figure}
Note: See TracBrowser for help on using the repository browser.