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Geologic Hazards
Largest Hurricanes

Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Volcanic Explosivity

Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.
Hazard Insurance

Homeowners Insurance and Geologic Hazards Most policies do not cover geologic hazards.
Lightning Strikes Map

Lightning Strikes Map - shows the worldwide distribution of lightning activity.
Geology Dictionary

Geology Dictionary - contains thousands of geological terms with their definitions.
Lightning Hotspot

World Record Lightning - This lake has more lightning than any other place in the world.
Rock Fall Photos

Yosemite Rock Fall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn.
Atlantic Tsunamis

Atlantic Tsunamis Rare events that can cause damage and threaten millions of people.
Pacific Tsunamis

Pacific Tsunamis This ocean is surrounded by plate boundaries, that can produce tsunami.