Sector collapse

A sector collapse is the collapse of a portion of a volcano due to a phreatic eruption, an earthquake, or the intervention of new magma.[1] Occurring on many volcanoes,[2] sector collapses are generally one of the most hazardous volcanic events,[3] and will often create lateral blasts.[4]

Documented Events

A sector collapse was documented during a Mt. St. Helens eruption.[5] It occurred due to an earthquake that was a result of the eruption.

In Italy, the Sciara del Fuoco is a scar left by a sector collapse that happened over 5000 years ago.[6] The volcano involved was the Stromboli volcano.

A sector collapse was formed during an eruption of a volcano in Nicaragua.[7]

References
  1. John. "Volcanic Sector Collapse - John Seach". www.volcanolive.com. Retrieved 2018-10-26.
  2. Acocella, Valerio (2005-02-10). "Modes of sector collapse of volcanic cones: Insights from analogue experiments". Journal of Geophysical Research: Solid Earth. 110 (B2). doi:10.1029/2004jb003166. ISSN 0148-0227.
  3. Kervyn, M.; Ernst, G. G. J.; Klaudius, J.; Keller, J.; Mbede, E.; Jacobs, P. (2008-10-28). "Remote sensing study of sector collapses and debris avalanche deposits at Oldoinyo Lengai and Kerimasi volcanoes, Tanzania". International Journal of Remote Sensing. 29 (22): 6565–6595. doi:10.1080/01431160802168137. ISSN 0143-1161.
  4. "Sector Collapse | Mount Rainier". www.uccs.edu. Retrieved 2018-10-26.
  5. "Fig. 15 Sector collapse and explosion sequence at Mount St Helens. View..." ResearchGate. Retrieved 2019-01-04.
  6. Romagnoli, C.; Kokelaar, P. (1995-08-01). "Sector collapse, sedimentation and clast population evolution at an active island-arc volcano: Stromboli, Italy". Bulletin of Volcanology. 57 (4): 240–262. doi:10.1007/BF00265424. ISSN 1432-0819.
  7. Peltey, D.; Kerle, N.; Vries, B. van Wyk de (2000). "Sector collapse forming at Casita volcano, Nicaragua". Geology. 28 (2): 167–170. doi:10.1130/0091-7613(2000)28<167:SCFACV>2.0.CO;2.


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