地理:為什麼有些火山島在爆發後,高度沒有增加,反而整座消失?

Because the volcano sink into the sea. Like the one happened in an island of Indonesia years ago. You can search on the Internet by yourself.

You can also contact me[ good at Geography ]by the e-mail below:
[email protected]
Hope that I can help you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

例子--Lake Toba 多峇湖
videos 1 to 5
http://www.youtube.com/watch?v=7MlNKz9vgXg

http://www.boanson.net/ref/refHumanOToba.htm

依wiki資料,應該沒有了

because the water