Sierra Negra is the largest andoneofthe most active volcano.
Sierra Negra rises to an elevation of nearly 1500 meters (4890 feet) and is located inthe southeast of Isla Isabela, (or Albermarmarle Island.)
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the 1979 lava flows erupted from a vent called Volcan chico, located along the rift just to the northeast of the Caldera.
