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Puyehue Volcanic Eruption- Chile
Transcript of Puyehue Volcanic Eruption- Chile
Chile 1905 4 June 2011 1914 1919 1921 1929 1934 1960
VEI: 3 1990
VEI: 1 Timeline:
Volcanic eruptions of Puyehue Volcano 4 June 2011 Explosion 3 June 2011 1450 earthquakes Focus of 2-5 km depth >130 earthquakes had a magnitude of >2 Alert level 4, yellow ~60 earthquakes/hour ~230 earthquakes/hour Focus of 1-4 km depth Lasted for 6 hours 12 events of magnitude >4 50 events of magnitude 3 Alert level 5, red 10 km high 5 km wide ash-and-gas plume Alert level raised to 6, red pyroclastic flow deposits were observed Strong sulfur odor Ash and pumice fall NASA image of the ash plume on 4 June Boundaries Process Effects Plate Internal forces Puyehue Volcano,
Chile Peru-Chile deep sea trench Convection currents in the Earth's mantle Nazca plate collides with the south american plate Destructive margin Subduction zone area where oceanic crust is forced downwards and destroyed due to the high pressure friction + increased temperature Nazca Plate is forced downwards Puyehue volcanic eruption Oceanic crust melts to form magma Nazca Plate and South American Plate are moving towards each other at different rates Newly formed magma rises Nazca Plate collides with South american Plate lighter heavier->sinks 3 June's earthquakes Effects Primary Effects Aftermath Secondary Effects 3500 people were evacuated from the area ash fell like a snowstorm Poor visibility SOurces http://www.volcano.si.edu/world/volcano.cfm?vnum=1507-15=&volpage=weekly http://bigthink.com/ideas/38731 http://www.volcanolive.com/puyehue.html http://thewatchers.adorraeli.com/2011/06/05/chile-volcano-erupts-prompted-evacuation-of-3500-people/ Pumice are light, porous volcanic rock formed during explosive eruptions covered a popular ski resort in Argentina Airports were closed 6 airports in Argentina A border crossing Chile and argentina was closed wind blew from NW for first 2 days Wind blew from SW VEI: 2 Transportation tickets are more expensive Ferry company TT Line charged overpriced fares of $300 (original price $99) http://www.news.com.au/travel/news/chile-ash-cloud-hits-tassie-nz-flights/story-e6frfq80-1226073731601 41,000 people were stranded 283 cancelled flights http://www.boston.com/bigpicture/2011/06/volcano_erupts_in_chile.html Lake Nahuel Huapi was contaminated with ash Rain + ash created a mudslide near the
Cardenal Samore border crossing road lahar Nilahue river was at risk of flooding due to pyroclastic material that filled it Road traffic Dead fish in rivers were due to a 40°C increase in temp. Volcanic ash covered the car http://earthquake-report.com/2011/series-of-moderate-earthquakes-in-chile-argintina-lake-district-may-set-off-the-eruption-of-puyehue-cordon-caulle-volcanoes/ Alert level Red Airline flexibility policies Still going on http://www.eosnap.com/tag/puyehue-volcano/ Measures taken Suggested measures Effectiveness Preventive Measures Alert levels to warn residents Immediate evacuation of residents living near volcano Soldiers sent to help evacuation Dangerous areas were sealed off Relocated to shelters in safe areas No deaths Prevent crowding in areas near volcano Back up medical supplies Ensure that every family has oxygen masks to prevent suffocation -End- VEI: 3