Melosh's main point was that the ocean wave cannot be taller than the depth of the ocean, whereas some earlier work had allowed that possibility. His second point was that the impact tsunami waves have a shorter wavelength than true deep ocean tsunami waves, and this allows them to break somewhat offshore. I think the first point is well taken. The second needs more thought (at least on my part). Even taking Melosh's points into account, we are still talking about horrendously big waves. Maybe not big enough to sweep across the eastern states to the Appalachians but NY and the coastal cities would all suffer. Would you prefer to be hit by a 16 wheel semi or by a GMC van? That's the flavor of the issue at hand. Dave LSST LSST LSST LSST LSST Mailing List Server LSST LSST LSST LSST LSST LSST LSST LSST This is message 35 in the lsst-general archive, URL LSST http://www.astro.princeton.edu/~dss/LSST/lsst-general/msg.35.html LSST http://www.astro.princeton.edu/cgi-bin/LSSTmailinglists.pl/show_subscription?list=lsst-general LSST The index is at http://www.astro.princeton.edu/~dss/LSST/lsst-general/INDEX.html LSST To join/leave the list, send mail to lsst-request@astro.princeton.edu LSST To post a message, mail it to lsst-general@astro.princeton.edu LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST LSST