Simula Research Laboratory, Lysaker, Norway';
$tit ='Simulation of Tsunamis Generated by Earth-Asteroid Collisions';
$abstract ='Throughout its history of existence the Earth have been hit by '.
'asteroids and comets. Impacts from the largest objects may have caused'.
'dramatic environmental changes. For example, impacts are now commonly'.
'believed to explain sudden mass-extinction of species, with the'.
'Chicxulub impact (65 Mya) and the extinction of the dinosaurs as the'.
'primary example. Giant tsunamis may be generated from marine'.
'impacts. These tsunamis may have disastrous regional and, possibly,'.
'even global effects. In this talk we look more closely at a specific'.
'marine impact that took place 142 million years ago in the Barents'.
'sea. The impact occured in a depth of about 400 m and formed a crater'.
'with a diameter of 40 km. The resulting waves are estimated to be'.
'100-200 m in height. '.
'We outline how such a multi-disciplinary, multi-physics, and'.
'multi-scale problem can be attacked, and what kind of mathematical'.
'models and numerical methods we have applied for simulating the'.
'tsunami propagation. Comparison of such impact events with'.
'earthquake-generated tsunamis, like the one on Dec 26, 2004, will be'.
'made. Finally, we discuss shortcomings of the models and suggest'.
'possible improvements.';
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Room , Cybernetica Bldg, Akadeemia tee 21, Tallinn, Estonia |
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Abstract