"A map of Krakatoa after the 1883 eruption,
showing the change in geography."
Posted on 11/28/2010 11:16:40 PM PST by Beowulf9
"In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate, sinking into the Earth's mantle, as the plates converge. A subduction zone is an area on Earth where two tectonic plates move towards one another and subduction occurs. Rates of subduction are typically measured in centimeters per year, with the average rate of convergence being approximately 2 to 8 centimeters per year (about the rate a fingernail grows).[1]
Subduction zones involve an oceanic plate sliding beneath either a continental plate or another oceanic plate (that is, the subducted plate is always oceanic while the subducting plate may or may not be oceanic). Subduction zones are often noted for their high rates of volcanism, earthquakes, and mountain building. This is because subduction processes result in melt of the mantle that produces a volcanic arc as relatively lighter rock is forcibly submerged."
Yes, I first heard of that on the documentary “Supervolcano”.
http://www.youtube.com/watch?v=bqpOTJAAwBU&feature=related
“Andi Arief, presidential advisor on Disaster Issues’
Obama: “So, Andi, what are your thoughts on the November election results?”
November *2008* occurred one of the worst geopolitical disasters in American history (aka “hope and change”).
This is fabulous. Sumatra is a hotbed, I expect it would never happen, but what if say 1/4 or 1/2 of these volcanoes erupted at once?
Great place to understand the mechanisms of volcanic activity.
Will study this earlier this afternoon, thanks for this information!
Beautiful photo! Looks at first to be a very romantic setting for a honeymoon-moonlight, stars, calm waters and a volcano glowing in the distance,and... HEY YOU BUM! STOP TAKING PICTURES AND LEAVE US ALONE!!!;)
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