A syn-eruptive ground deformation episode measured by GPS, during the 2001 eruption on the upper southern flank of Mt Etna

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• 作者：Alessandro Bonforte ; Francesco Guglielmino ; Mimmo Palano and Giuseppe Puglisi
• 关键词：GPS ; Ground deformation ; Modelling ; Volcano monitoring
• 刊名：Bulletin of Volcanology
• 出版年：2004
• 出版时间：May 2004
• 年：2004
• 卷：66
• 期：4
• 页码：336-341
• 全文大小：455 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geology
  Geophysics and Geodesy
  Mineralogy
  Sedimentology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0819

文摘

Ground deformation occurring on the southern flank of Mt Etna volcano during the July–August 2001 eruption was monitored by GPS measurements along an E–W profile crossing the fissure system. This profile was measured eight times during the eruption, using the 'stop and go' semi-kinematic technique. Horizontal and vertical displacements between GPS surveys are reported for each station. The most significant event is a deformation episode occurring during the first week of the eruption, between 25–27 July. Displacements were measured on benchmarks close to the eruptive fissure and the tensile 1989 fracture. Data inversions for measured displacements were performed using the Okada model. The model shows the narrowing of the 2001 dyke accompanied by a dextral dislocation along an east-dipping fault, parallel to the 1989 fracture.