The roughly 7 x 12 km Graciosa island in the Azores archipelago has a 1.2 x 1.9 km caldera at the SE end, shown in this April 2019 Planet Labs satellite image monthly mosaic (N is at the top). The NW area contains scoria cones, many that have undergone flank collapse or rafting during Strombolian eruptions leaving an amphitheater shape, and lava flows. The growth of the island has been disrupted by multiple major flank collapse events through time.

Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/).

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Keywords: caldera | scoria cone | vent | crater | island volcano

Graciosa