EASC 104 Lecture Notes - Lake Nyos, Lahar, Debris Flow

• School: Simon Fraser University
• Department: Earth Sciences
• Course: EASC 104
• Professor: Jeffrey Zurek

Document Summary

Part of the mid-atlantic ridge and is a hotspot. Common for hotspots to occur on ridge systems. Partial melting due to heat; don"t see a string of island for island. Hot spot is stationary and access to ridge is stationary = more likely to see volcanoes. Toxic mixture which can cause havoc in human body. Lake nyos: lake inside a crater throughout time, thick rich layer formed landslide causes all the water to overturn, releasing all co2 in one go bubbles down the valley below and kills animals/people (not very common) Volcanic gases: gases reduce solar radiation sulfur dioxide is easily dissolvable, but doesn"t readily happen in this case. Perceived activity & risk: more and more people live closer to volcanoes, more volcanoes erupting per year (not entirely true) amount of volcanoes erupting over time has not increased. Vulnerability is a function of the exposure & reoccurrence of hazard.