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OPEN-FILE REPORT

Philippine Institute of Volcanology and Seismology, Powered by Joomla!
Tsunami Information PDF Print
Wednesday, 15 October 2008 00:55

Tsunami Bulletin


 

 


 

What is a tsunami?

 

A Tsunami is a series of sea waves commonly generated by under-the-sea earthquakes and whose heights could be greater than 5 meters. It is erroneously called tidal waves and sometimes mistakenly associated with storm surges. Tsunamis can occur when the earthquake is shallow-seated and strong enough to displace parts of the seabed and disturb the mass of water over it.

 

SOME NATURAL SIGNS OF AN APPROACHING LOCAL TSUNAMI


1) A felt earthquake.

 

2) Unusual sea level change: sudden sea water retreat or rise.

 

3) Rumbling sound of approaching waves.