Hi,
This came to my notice just now...
Open Tsunami Alert System
http://otasblog.blogspot.com/2005/01/introduction.html
Regards
Kumaraguru
-----------------------------
From: "Suresh Ramasubramanian" <linux@xxxxxxxxxxxxxxxx>
To: <schander@xxxxxxxxxxxxxx>
Cc: "Sivasankar Chander" <siva@xxxxxxxxxxxxxxxxxxxx>;
<ilugc@xxxxxxxxxxxxx>
Sent: Sunday, December 26, 2004 9:02 PM
Subject: Re: [Ilugc] OT: Automated Tsunami warning script/program ?
Sivasankar Chander wrote:a
Just thinking out aloud - it should be fairly trivial to develop
earthquakePHP/Perl script that parses the USGS Earthquake Hazards site at
http://earthquakes.usgs.gov, retrieves information for all
events, and automatically sends out an e-mail alarm when an event
One of my friends already has this up and running - he's in Taiwan,
which has lots more earthquakes and tsunamis on a regular basis.
earthquake
Just thinking out aloud - it should be fairly trivial to develop a
PHP/Perl script that parses the USGS Earthquake Hazards site at
http://earthquakes.usgs.gov, retrieves information for all
events, and automatically sends out an e-mail alarm when an eventMadras
exceeding a certain magnitude (say 7.0) occurs within a well-defined
Oceanic region (say the Indian Ocean / Bay of Bangal). This would
be similar to the systems already in operation at the Pacific
Tsunami Watch Centre (PTWC) at Honolulu, Hawaii and the Alaska
Tsunami Watch Centre (ATWC), both of which parse a network of
seismometers and issue automated warnings.
The reason this works very well for the US and Japan is that
the Pacific Ocean is fairly large, so there's a sufficient
delay between an Earthquake event (which can be detected in
less than 15 minutes around the globe from the fast-propagating
P-Wave) and the following Tsunami, which could take about 12 hours
to get from one side of the Pacific Ocean to the other. This allows
ample time for a warning to be circulated.
In the case of the Great Sumatran/Andamans Earthquake of 2004
(which took place this morning), the P-wave would have reached
in about 4 minutes, while the Tsunami took about 2.5-3 hours toreach
Madras.areas.
The time difference would have been barely sufficient to get a
message out on the Radio/TV and evacuate the low-lying coastal
Difficult, but definitely well within reach of present technology.
However, it's another issue whether we have the civic discipline
to actually perform an orderly and timely evacuation in India :-(.
-Siva