Hybrid modeling of the mega-tsunami runup in Lituya Bay after half a century
Article first published online: 9 MAY 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 9, May 2009
How to Cite
2009), Hybrid modeling of the mega-tsunami runup in Lituya Bay after half a century, Geophys. Res. Lett., 36, L09602, doi:10.1029/2009GL037814., , and (
- Issue published online: 9 MAY 2009
- Article first published online: 9 MAY 2009
- Manuscript Accepted: 10 APR 2009
- Manuscript Revised: 1 APR 2009
- Manuscript Received: 20 FEB 2009
- hybrid modeling
 The largest mega-tsunami dates back half a century to 10 July 1958, when almost unnoticed by the general public, an earthquake of Mw 8.3 at the Fairweather Fault triggered a rockslide into Lituya Bay. The rockslide impact generated a giant tsunami at the head of Lituya Bay resulting in an unprecedented tsunami runup of 524 m on a spur ridge in direct prolongation of the slide axis. A forest trim line and erosion down to bedrock mark the largest runup in recorded history. While these observations have not been challenged directly, they have been largely ignored in hazard mitigation studies, because of the difficulties of even posing – much less solving – a well-defined physical problem for investigation. We study the mega-tsunami runup with a hybrid modeling approach applying physical and numerical models of slide processes of deformable bodies into a U-shaped trench similar to the geometry found at Lituya Bay.