04-16-2012, 06:55 PM
Just did a quick search and it seems that at plate boundries they can occur as deep as 750 km. I didn't know that. I guess you learn something every day.
http://earthquake.usgs.gov/learn/facts.php (bullet 27)
Tom
http://apacificview.blogspot.com/
http://earthquake.usgs.gov/learn/facts.php (bullet 27)
Tom
http://apacificview.blogspot.com/