[139142] in North American Network Operators' Group
RE: New tsunami advisory warning - Japan
daemon@ATHENA.MIT.EDU (Gavin Pearce)
Mon Mar 28 06:44:14 2011
Date: Mon, 28 Mar 2011 11:43:00 +0100
In-Reply-To: <68456.56069.qm@web59611.mail.ac4.yahoo.com>
From: "Gavin Pearce" <Gavin.Pearce@3seven9.com>
To: "andrew.wallace" <andrew.wallace@rocketmail.com>, <Valdis.Kletnieks@vt.edu>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> *yawn*. A foot and a half isn't going to be all *that* bad
Sorry to continue off topic:
Try to imagine ... a temporary very high tide, rather than a cresting
wave. In addition to the "height", it's the wave-length you have to take
into account. Tsunami's rarely become towering breaking waves.
[That said, tsunamis can form into a bore - a step-like wave with a
steep breaking front. Likely if the tsunami moves from deep water into a
shallow river / bay]
1 1/2 foot on top of an existing high tide, could easily cause further
flooding in the wrong locations (although as mentioned, not to the
levels already experienced).
> travels in general at approx 970 kph (600 mph)
True in the deepest parts of open ocean - upon reaching the shore-line
it'll be travelling a lot slower.
</off-topic>
// Gav
=20
