Observation of infrasonic and gravity waves at Soufriere Hills Volcano, Montserrat

被引：54

作者：

Ripepe, Maurizio ^{[1
]}

De Angelis, Silvio ^{[2
]}

Lacanna, Giorgio ^{[1
]}

Voight, Barry ^{[3
]}

机构：

[1] Univ Florence, Dipartimento Sci Terra, I-50121 Florence, Italy

[2] Univ Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, England

[3] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

PYROCLASTIC FLOWS; DOME COLLAPSE;

D O I：

10.1029/2010GL042557

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The sudden ejection of material during an explosive eruption generates a broad spectrum of pressure oscillations, from infrasonic to gravity waves. An infrasonic array, installed at 3.5 km from the Soufriere Hills Volcano has successfully detected and located, in real-time, the infrasound generated by several pyroclastic flows (PF) estimating mean flow speeds of 30-75 m/s. On July 29 and December 3, 2008, two differential pressure transducers, co-located with the array, recorded ultra long-period (ULP) oscillations at frequencies of 0.97 and 3.5 mHz, typical of atmospheric gravity waves, associated with explosive eruptions. The observation of gravity waves in the near field (<6 km) at frequencies as low as about 1 mHz is unprecedented during volcanic eruptions. Citation: Ripepe, M., S. De Angelis, G. Lacanna, and B. Voight (2010), Observation of infrasonic and gravity waves at Soufriere Hills Volcano, Montserrat, Geophys. Res. Lett., 37, L00E14, doi: 10.1029/2010GL042557.

引用

页数：5

共 16 条

[1] Pyroclastic flows generated by gravitational instability of the 1996-97 lava dome of Soufriere Hills Volcano, Montserrat [J].