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Re Tsunami

 
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shahid.sm
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 2

PostPosted: Mon Dec 27, 2004 1:13 pm    Post subject: Re Tsunami Reply with quote

It was an unexpected event for the Indian people of coastal regions
because it is first time in history here. Usually the Tsunami's are
most common in Pacific ocean.
This time Nature has shown that there is no limit or boundary for it.
It is infact a new event for Indian coastal areas. Although Tsunami
waves can be predicted just within 5 minutes after it starts in ocean.
As many of countries situated on "ring of fire" are member of tsunami
alarm system.
Hope now India will also join that group which is having its
headquarter at Honolulu Island. For the kind information of all
friend's, let me tell you how to calculate the velocity of Tsunami
wave front: It is calculated by formula

V=sqrt(g. d), where g is gravitational constt.( 9.8 m/sec2) and d is
the depth of water in ocean at the epicenter (not the depth of focus)
e.g. if you substitute 'd' about 4000 m and g= 10 than veloity comes
200 m/s or 720 KM/hr. This value further amplifies when it reaches in
shallow water means near coast.

hope many of you know that.

Shahid Manzoor

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phkumar
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 1

PostPosted: Mon Dec 27, 2004 1:30 pm    Post subject: Re Tsunami Reply with quote

I think it is the imperative responsibility of Remote sensing department to envisage the occurence of
Tsunamis thru satellite generated informations.

Hemanth.

-----Original Message-----
Message From  karkeer@sancharnet.in [mailto:karkeer@sancharnet.in]
Sent: Monday, December 27, 2004 4:00 PM
To: Hemanth Kumar Pammi
Subject: Re Tsunami


Dear
My sincere condolences to all affected by Tsunami attack.  
Don't we have sufficient intrumentation/monitoring arrangemnts to give warning about Tsunami attacks. If not It is high time to think on this line. It is known that in Japan There are warning alarms for the people to escape and move to safer places.

Shashidharan

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anand.shah1
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 13

PostPosted: Mon Dec 27, 2004 3:39 pm    Post subject: Re Tsunami Reply with quote

Mr. Shaheed.

Is there any effect of earhtquake mangitude on the
velocity of waves u have mentioned?

regards

anand
----- Original Message -----
Message From  <shahid.sm@gmail.com>
To: <Anand.shah@babtieindia.com>
Sent: Monday, December 27, 2004 6:43 PM
Subject: Re Tsunami


Quote:
It was an unexpected event for the Indian people of coastal regions
because it is first time in history here. Usually the Tsunami's are
most common in Pacific ocean.
This time Nature has shown that there is no limit or boundary for it.
It is infact a new event for Indian coastal areas. Although Tsunami
waves can be predicted just within 5 minutes after it starts in ocean.
As many of countries situated on "ring of fire" are member of tsunami
alarm system.
Hope now India will also join that group which is having its
headquarter at Honolulu Island. For the kind information of all
friend's, let me tell you how to calculate the velocity of Tsunami
wave front: It is calculated by formula

V=sqrt(g. d), where g is gravitational constt.( 9.8 m/sec2) and d is
the depth of water in ocean at the epicenter (not the depth of focus)
e.g. if you substitute 'd' about 4000 m and g= 10 than veloity comes
200 m/s or 720 KM/hr. This value further amplifies when it reaches in
shallow water means near coast.

hope many of you know that.

Shahid Manzoor







Quote:


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shahid.sm
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 2

PostPosted: Mon Dec 27, 2004 5:46 pm    Post subject: Re Tsunami Reply with quote

Tsumani are caused by the earthquakes which cuase a disturbance in the
seafloor. The size of the tsunami is usually related to the size of
the earthquake, with larger tsumani generated by larger earthquakes.
But the sense of displacement is also important.  Tsumani are
generally only formed when an earthquake causes vertical displacement
of the seafloor.
Thus, tsumani only occur if the fault generating the earthquake has
normal or reverse displacement.  Because of this, most tsumani are
generated by earthquakes that occur along the subduction boundaries of
plates, along the oceanic trenches.
So, its not always true that the higher magnitude of earthquake will
cause deadly tsunami waves. The 1906 earthquake near San Francisco,
California had a magnitude of about 7.1, yet no tsunami was generated
because the motion on the fault was strike-slip motion with no
vertical displacement.

Regards
Shahid Manzoor


On Mon Dec 27 21:09:22 2004, Anand.shah@babtieindia.com
<Anand.shah@babtieindia.com> wrote:
Quote:
Mr. Shaheed.

Is there any effect of earhtquake mangitude on the
velocity of waves u have mentioned?

regards

anand
----- Original Message -----
Message From  <shahid.sm@gmail.com>
To: <Anand.shah@babtieindia.com>
Sent: Monday, December 27, 2004 6:43 PM
Subject: Re Tsunami

It was an unexpected event for the Indian people of coastal regions
because it is first time in history here. Usually the Tsunami's are
most common in Pacific ocean.
This time Nature has shown that there is no limit or boundary for it.
It is infact a new event for Indian coastal areas. Although Tsunami
waves can be predicted just within 5 minutes after it starts in ocean.
As many of countries situated on "ring of fire" are member of tsunami
alarm system.
Hope now India will also join that group which is having its
headquarter at Honolulu Island. For the kind information of all
friend's, let me tell you how to calculate the velocity of Tsunami
wave front: It is calculated by formula

V=sqrt(g. d), where g is gravitational constt.( 9.8 m/sec2) and d is
the depth of water in ocean at the epicenter (not the depth of focus)
e.g. if you substitute 'd' about 4000 m and g= 10 than veloity comes
200 m/s or 720 KM/hr. This value further amplifies when it reaches in
shallow water means near coast.

hope many of you know that.

Shahid Manzoor


















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