PPT-Volcanic Eruptions and Hazards

How and why do volcanoes erupt Hot molten rock magma is buoyant has a lower density than the surrounding rocks and will rise up through the crust to erupt on the surface When magma reaches the surface it depends on how easily it flows viscosity and the amount of gas H. The volcanic aerosol cloud forms in several weeks by the conversion of sulfur dioxide SO to sulfate aerosol and its subsequent microphysical transfor mations The resulting cloud of sulfate aerosol particles with a residence time of a couple of years Chapter 9. Lesson 2. Videos. http://video.nationalgeographic.com/video/kids/forces-of-nature-kids/volcanoes-101-kids/. Volcanoes 101 National Geographic.. https://www.youtube.com/watch?v=cQMB7o3SXOw. Volcanic Eruptions. 1. Why Volcanoes Erupt:. The F of expanding gas builds and pushes magma through the vent. 2. Major Factors in Eruptions:. a. The amount of trapped gas. CO. 2. and Sulfur. b. Silica Content. Didier . Swingedouw, . Juliette Mignot, Eric Guilyardi, Pablo Ortega, . M. yriam . Khodri. EPIDOM. Evaluation of Interannual to decennial predictability starting from observations and models. Van . Oldenborgh. By Robbie Barker, Maximilian Bryson, and Brendan . P. etrili. What is a volcano. A volcano is an opening in the Earth’s surface through which magma rises.. Formation of volcanoes. 1.Most volcanoes occur at colliding boundaries.. More than 2,000 years ago, Pompeii was a busy Roman city near the sleeping volcano Mount Vesuvius. People did not see Vesuvius as much of a threat. Everything changed when Vesuvius suddenly erupted and buried the city in a deadly blanket of ash that was almost 20 ft. thick!. Chapter 9 . Section 1. Volcanic Eruptions. During an eruption . magma. is forced to the Earth’s surface. Magma. – molten rock below the Earth’s surface. Lava – magma that . flows. on the Earth’s surface. robock@envsci.rutgers.edu. http://envsci.rutgers.edu/~robock. Alan Robock. Department of Environmental Sciences. Rutgers University, New Brunswick, New Jersey. Desire for improved well-being. Consumption of goods and services. Volcanoes are locations where molten rock reaches Earth’s surface, and volcanoes can affect landforms and societies.. What You Will Learn. Distinguish between nonexplosive and explosive volcanic eruptions. . Section 18-1. Magma. Objectives:. Describe factors that can affect the formation of magma. Compare and contrast the different types of magma. Volcanic Eruptions. In the last 10,000 years more than 1500 major volcanic eruptions have been recorded…where and why do these eruptions occur?. What is a volcano?. A volcano is a vent or 'chimney' that connects molten rock (magma) from within the Earth. ’. s crust to the Earth's surface. . The volcano includes the surrounding cone of erupted material. . Volcanoes. Volcano:. mountain that forms in Earth’s crust when molten material (magma) reaches the surface. . Remember, . magma . is molten rock below ground; . lava. is molten rock at the surface. . Definition. . An adverse . cutaneous. drug eruption is defined as . an undesirable . cutaneous. manifestation resulting from the administration of a particular drug and may result from its overdose, predictable side effects or unanticipated adverse manifestations.. Társilo. Girona. Science . Questions: . One of the . most . enigmatic . volcanic signals . is shallow . tremor. , a highly-periodic ground vibration that is . long-lasting . (from minutes to years.