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GEOL 2207 (204)
B.Ward (130)
Lecture

Weather Hazards.docx

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Department
Geology
Course
GEOL 2207
Professor
B.Ward
Semester
Summer

Description
Weather Hazards: o Strong winds o Lightning – more people killed by lightning o Can spawn tornadoes o Hail - $1 billion/year in US alone Lightning o Discharge of electricity during thunderstorm o Caused by difference in electrical potential from particle collision in clouds (lightning rebalances charge) o Air-to-ground: narrow column of electrons (stepped leader) moves downward from the base of a cloud toward a pocket of positive charge on Earth: spark jumps from a tall object and completes a conductive channel of ionized air molecules for a
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