Logo link to homepage

Global Volcanism Program | Image GVP-06233

The Caldeira Seca pumice ring (center) was formed during a 15th-century explosive eruption through the Sete Cidades caldera lake.  A 1444 date is considered the most likely, although dates of 1439 and 1440 are sometimes listed.  The Sete L tephra deposit originated from the 600-m-wide, 100-m-deep pumice ring, which is located on the SW floor of the Sete Cidades caldera, whose NE wall forms the horizon. Photo by Rick Wunderman, 1997 (Smithsonian Institution).

The Caldeira Seca pumice ring (center) was formed during a 15th-century explosive eruption through the Sete Cidades caldera lake. A 1444 date is considered the most likely, although dates of 1439 and 1440 are sometimes listed. The Sete L tephra deposit originated from the 600-m-wide, 100-m-deep pumice ring, which is located on the SW floor of the Sete Cidades caldera, whose NE wall forms the horizon.

Photo by Rick Wunderman, 1997 (Smithsonian Institution).


Sete Cidades