Monochromatic infrasonic tremor driven by persistent degassing and convection at Villarrica Volcano, Chile
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- M. Ripepe
- Dipartimento di Scienze della Terra Università di Firenze Florence Italy
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- E. Marchetti
- Dipartimento di Scienze della Terra Università di Firenze Florence Italy
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- C. Bonadonna
- Section des Sciences de la Terre et de l'Environnement Université de Genève Geneva Switzerland
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- A. J. L. Harris
- Laboratoire Magmas et Volcans Université de Blaise Pascal Clermont‐Ferrand France
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- L. Pioli
- Section des Sciences de la Terre et de l'Environnement Université de Genève Geneva Switzerland
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- G. Ulivieri
- Dipartimento di Scienze della Terra Università di Firenze Florence Italy
書誌事項
- 公開日
- 2010-08
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2010gl043516
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>Infrasonic data collected at Villarrica volcano (Chile) in March 2009 show a sustained, continuous, infrasonic oscillation (tremor) with a monochromatic low frequency content at ∼0.75 Hz. This tremor is extremely stable in time both at the summit and at a distal (∼4 km) small aperture array. Infrasonic tremor is characterized by discrete high amplitude bursts with a cyclic recurrence time of ∼40 s and is well correlated (0.93) with seismic tremor. These new data are compared with previous datasets collected in 2002 and 2004 during different levels of activity. All data show the same persistent infrasonic tremor and have the same strong correlation with seismic tremor. The stability and correlation of infrasonic and seismic tremor indicate the existence of a sustained and continuous process, which we suggest is related to the gravity‐driven bubble column dynamics responsible for conduit convection.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 37 (15), 2010-08
American Geophysical Union (AGU)