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shahid.sm SEFI Member
Joined: 26 Jan 2003 Posts: 2
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Posted: Mon Dec 27, 2004 1:13 pmPost subject: Re Tsunami |
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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 水在海洋的深度(不是中心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
Joined: 26 Jan 2003 Posts: 1
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Posted: Mon Dec 27, 2004 1:30 pmPost subject: Re Tsunami |
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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
Joined: 26 Jan 2003 Posts: 13
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Posted: Mon Dec 27, 2004 3:39 pmPost subject: Re Tsunami |
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Mr. Shaheed.
Is there any effect of earhtquake mangitude on the velocity of waves u have mentioned?
regards
anand ----- Original Message ----- Message From To: Sent: Monday, December 27, 2004 6:43 PM Subject: Re Tsunami
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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 水在海洋的深度(不是中心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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shahid.sm SEFI Member
Joined: 26 Jan 2003 Posts: 2
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Posted: Mon Dec 27, 2004 5:46 pmPost subject: Re Tsunami |
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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 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 To: 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 水在海洋的深度(不是中心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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