کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4714901 1638452 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural changes of volcanic tremor at Stromboli volcano
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Structural changes of volcanic tremor at Stromboli volcano
چکیده انگلیسی

The occurrence of a tectonic event sufficiently close to a volcano and/or sufficiently energetic can trigger a change in its eruptive activity. Examples include Ambrym (Vanuatu), Teide (Spain), Tungurahua (Ecuador) and Villarrica (Chile). Of course the possibility that an earthquake can even trigger a new eruption has serious implications in terms of hazard. However, no serious attempt has been carried out so far to formalize the identification of these structural changes with a statistical approach. In this work a statistical approach is applied to identify structural changes in volcanic tremor recorded at Stromboli from April to July, 2006. We considered different fluctuation-type tests using the open source package strucchange written in R language [Zeileis, A., Leisch, F., Hornik, K., Kleiber, C., 2002. strucchange: an R package for testing for structural change in linear regression models. J. Stat. Softw. 7(2), 1–38]. Stromboli is a particularly interesting case study: whilst previous work [Falsaperla, S., Alparone, S., Spampinato, S., 2003. Seismic features of the June 1999 tectonic swarms in the Stromboli volcano region, Italy. J. Volcanol. Geotherm. Res., 125(1–2), 121–136] had suggested that tectonic events have no influence on volcanic activity, most recent results [Carniel, R., Tárraga, M., 2006. Can tectonic events change volcanic tremor at Stromboli? Geophys. Res. Lett., 33, L20321, doi:10.1029/2006GL027690] suggest otherwise. The aim of this work is to confirm by use of a statistical method, the presence of changes in the recorded tremor related to the occurrence of volcano-tectonic events on Stromboli, as pointed out by Carniel and Tárraga [Carniel, R., Tárraga, M., 2006. Can tectonic events change volcanic tremor at Stromboli? Geophys. Res. Lett., 33, L20321, doi:10.1029/2006GL027690]. We found that there was at least one variation in the time series associated to every earthquake, even in the cases for which previous analyses could not recognize any variation [Carniel, R., Tárraga, M., 2006. Can tectonic events change volcanic tremor at Stromboli? Geophys. Res. Lett., 33, L20321, doi:10.1029/2006GL027690].

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Volcanology and Geothermal Research - Volume 171, Issues 1–2, 30 March 2008, Pages 103–117
نویسندگان
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