| − | [[Image:Backarc.gif|thumb|300px]]The '''backarc''' is the region landward of the volcanic chain on the other side from the [[subduction zone]].<ref>USGS</ref> | + | [[Image:Backarc.gif|thumb|300px]]The '''backarc''' is the region landward of the volcanic chain on the other side from the [[subduction zone]].<ref>http://earthquake.usgs.gov/learning/glossary.php?term=backarc</ref> |