The October 22, 2005 eruption of Sierra Negra volcano on Isabella Island.

The October 22, 2005 eruption of Sierra Negra volcano on Isabella Island. This volcano lies on top of the Galapagos hotspot. Image courtesy of M. Hall, IG-EPN.

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GalAPAGoS: Where Ridge Meets Hotspot: What Is A Hotspot?

NOAA Ocean Explorer Gallery