[[Image:Backarc.jpg|thumb|300px]]The '''backarc''' is the region landward of the volcanic chain on the other side from the [[subduction zone]].<ref>USGS</ref>
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[[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>