GEOG 312 Lecture 3: Module 03 Volcano.pdf
24 Mar 2015
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Document Summary
In april, 2010, after 190 years of slumber, eyjafjallaj kull rumbled to life. January 19, 2012: eruption enters 29th year: actively erupting, march 19, 2008: explosion occurs. January 6, 2012: sulphur dioxide emission reach 150 tonnes per day. January 22, 2012: magnitude 5. 0 earthquake, focus depth 8km, epicenter 6km south of. Merapi, an indonesian volcano, erupted in late 2010 at the subduction zone where the indo- Baker: last eruption, 1880, is the most studied (gas sampling, tephra mapping: an eruption could spread ash and/or debris over washington, vancouver, and the hazard analysis) Physics: the global distribution of volcanoes in different tectonic settings is indicated below. Three types of volcano tectonic settings: spreading zones: oceanic ridges and continental rifting, plate boundaries: converging and subducting, hotspots: oceanic and continental. Spreading zones: the diagram below shows the east africa rift valley and maps rising magma near kenya, using the known velocity of seismic (p) waves velocity (velocities in km/s; depths in km)
