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Book Chapter

Temporal changes in eruptive behavior identified with coda wave interferometry and seismo-acoustic observations at Fuego Volcano, Guatemala

By
Jemile E. Erdem
Jemile E. Erdem
Department of Geological and Mining Engineering and Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA
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Gregory P. Waite
Gregory P. Waite
Department of Geological and Mining Engineering and Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, USA
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Published:
November 2013

Fuego Volcano (14°29′N, 90°53′W, 3800 m) is the southernmost vent of the north-south–trending Fuego-Acatenango volcanic complex. A basaltic-andesite stratovolcano, Fuego has had more than 60 subplinian eruptions since A.D. 1524, making it one of the most active volcanoes in the world. Since 1999, Fuego has exhibited continuous low-level activity, which alternates between periods of lava effusion with Strombolian explosions and periods of discrete explosions with no lava effusion. We analyzed explosions recorded on a broadband seismometer and infrasonic microphones in June and July 2008. The explosions were identified through a combination of visual field observations and the examination of infrasound records. Acoustic waveform cross-correlation indicated a highly repetitive source appropriate for investigating temporal variations in the wave field. The primary focus of this study is a time period from 8 to 27 June 2008, which included the emergence of a new lava flow. Using seismic coda wave interferometry analysis of 159 well-recorded explosions, we detected short-term relative changes in the velocity structure ranging from −0.23% to 0.61%. This rapid variation may indicate minor fluctuations in volatile content. Variations in seismic and acoustic wave arrival time differences, which might result from changes in source depth, are attributed to wind speed variations.

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Contents

GSA Special Papers

Understanding Open-Vent Volcanism and Related Hazards

Edited by
William I. Rose
William I. Rose
Geological Engineering & Sciences, Michigan Technological University, Houghton, Michigan 49931, USA
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José Luis Palma
José Luis Palma
Departamento de Ciencias de la Tierra, Universidad de Concepción, Victor Lamas 1290, Concepción, Chile
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Hugo Delgado Granados
Hugo Delgado Granados
Instituto de Geofísica, Universidad Nacional Autónoma de México Circuito Científico, C.U. Coyoacán 04510, México, D.F.
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Nick Varley
Nick Varley
Facultad de Ciencias, Universidad de Colima, Avenida Universidad 333, Colonia Las Víboras, C.P. 28040, Colima, México
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Geological Society of America
Volume
498
ISBN print:
9780813724980
Publication date:
2013

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