Collapse associated with caldera formation may have been as much as 1,100 m. 32 -- 39 cubic km of magma was erupted , making the Kuwae eruption one of the largest in the last 10,000 years .
Collapse associated with caldera formation may have been as much as 1,100 metres . 
 Around 32 -- 39 cubic km of magma was erupted , making the Kuwae eruption one of the largest in the last 10,000 years .