APSY2242 Lecture Notes - Lecture 10: Lava Lake, Pyroclastic Flow, Turbulence

• School: Boston College
• Department: Counseling, Developmental, and Educational Psychology
• Course: APSY2242
• Professor: Julia Whitcavitch Devoy

Document Summary

Magma and gas build up, causing earthquakes. Earthquake tremors are a warning sign that a volcano could be nearing eruption. St. helens eruption - a bulge formed before gas/magma release. As the volcano is destabilized, landslides can occur. Another warning sign that a volcano could be nearing eruption. Landslides occur as the fragile slopes are destabilized by volcano growth and earthquakes. St. helen"s eruption - the bulge destabilized the slope, causing a landslide. Lava: flowing magma on earth"s surface, i. e. in a lava flow". Lava flows burn/cover what they come in contact with. Typically slow moving, unless a lava lake bursts. A mix of lava, rock, gases, and other debris. Typically very hot: ~390 - 1300 degrees. They burn and/or suffocate nearly everything in their path. Responsible for about 29% of deaths from volcanoes in the last 500 years. Volcanic gases mix with fine particles, creating a dense, highly turbulent flow. The flow transports large pieces of rock and debris.