Report on Fogo (Cape Verde) — 10 December-16 December 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 10 December-16 December 2014
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Fogo (Cape Verde). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 10 December-16 December 2014. Smithsonian Institution and US Geological Survey.
14.95°N, 24.35°W; summit elev. 2829 m
All times are local (unless otherwise noted)
According to news articles the rate of lava output from Fogo's Pico cone inside the Cha Caldera had decreased on 9 December and remained low through 14 December. Gas and ash emissions also decreased and were almost absent by 14 December. Even though output was low, the remaining buildings in the town of Bangaeira were overtaken by lava.
Geologic Background. The island of Fogo consists of a single massive stratovolcano that is the most prominent of the Cape Verde Islands. The roughly circular 25-km-wide island is truncated by a large 9-km-wide caldera that is breached to the east and has a headwall 1 km high. The caldera is located asymmetrically NE of the center of the island and was formed as a result of massive lateral collapse of the ancestral Monte Armarelo edifice. A very youthful steep-sided central cone, Pico, rises more than 1 km above the caldera floor to about 100 m above the caldera rim, forming the 2829 m high point of the island. Pico, which is capped by a 500-m-wide, 150-m-deep summit crater, was apparently in almost continuous activity from the time of Portuguese settlement in 1500 CE until around 1760. Later historical lava flows, some from vents on the caldera floor, reached the eastern coast below the breached caldera.
Source: Fogo News