Contrasting degassing behaviors before and after a shift in eruptive style at Sinabung volcano, Indonesia
Penulis/Author
Jean-François Smekens (1); Loÿc Vanderkluysen (4); Brett B. Carr (5); Ir. Gayatri Indah Marliyani, S.T., M.Sc., Ph.D., IPM (6); Dr. Ir. Agung Harijoko, S.T., M.Eng., IPM. (7)
Tanggal/Date
2018
Kata Kunci/Keyword
Abstrak/Abstract
Volcanic activity is classically described as effusive or explosive in nature. However, many eruptions exhibit both behaviors alternatively, and sometimes simultaneously. This is especially true at volcanic centers of intermediate composition, where effusive activity such as the growth of a lava dome or lava flow is often accompanied by sporadic or regular explosions. Such systems offer unique opportunities for research, as their frequent changes in eruptive styles can be documented with a variety of geophysical techniques to investigate the source conditions that give rise to explosions. In this work, we present gas emission data acquired with SO 2 cameras at Sinabung volcano during a transition phase between quiescent degassing and explosive activity. Sinabung is an andesitic stratovolcano located on the island of Sumatra in Indonesia. Its most recent eruption period has seen the effusion of a 3 km long andesite.
