Necking and fracking may explain stationary seismicity and full degassing in volcanic silicic spine extrusion

• Main Authors: Jiao, Liqing, Tapponnier, Paul, Costa, Fidel, Donzé, Frédéric-Victor, Scholtès, Luc, Taisne, Benoit, Wei, Shengji
• Other Authors: Earth Observatory of Singapore
• Format: Article
• Language: English
• Published: 2019
• Subjects: Science::Geology::Volcanoes and earthquakes; Volcanic Seismicity; Spine Extrusion
• Online Access: https://hdl.handle.net/10356/88591; http://hdl.handle.net/10220/50458
• Institution: Nanyang Technological University

Volcanic seismicity during silicic spine eruptions often involves recurrent excitation of similar sources at stationary depth just beneath the crater. The mechanics of volcanic spine extrusion may be compared to those of high-temperature, industrial metal working. We thus use slip-line field theory...