GEOG 001 Lecture Notes - Lecture 21: Tiltmeter, Lake Nyos, Geochemistry
19 Aug 2020
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Document Summary
Lahars swept down from the erupting volcano. Lahars moved down the mountain at 30km/h. Increased response plans, and improved communication methods. A number of gases, including h2o, co2, co, so2, h2s, cl, and hf are emitted during volcanic eruptions, in some cases these gases reach toxic concentrations. Lake nyos in cameroon where the lake released a dense cloud of. Co2 spreading through 5 villages killing 1742 people. Sulphur dioxide can react with water in the atmosphere to produce acid rain. Volcanoes can produce a type of smog known as vog. Gas, ash, and rock fragments can be blown horizontally from the side of a volcano at the start of an eruption. Eject debris at tremendous speeds and can be very destructive. Flank of a volcano may collapse during an eruption or even at times of no eruptive activity; which flank collapse increase the size and strength of an eruption. Volcano"s slops become over-steepened and unstable during the magma"s ascent.
