Masaya

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Gas eruptions from Santiago Crater of Masaya.  Vigorous degassing takes place for several years at high rates of 1000's of tons of SO2 gas each day, causing severe acid rain down wind.

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Collaspe pit in frozen lava lake within Santiago crater.   Active lava lake below is sourse of 1000's of tons/day of SO2 gas.

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View of west end of Masaya caldera with its lake.   View from summit of active cone.  Recent lava cover the caldera floor.


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Gas plume from Masaya extends to the Pacifi coast, more than 30 km..  Photographed from comercial jet, Carr, 1982?.