Geologic Hazards

Earthquakes - Learn about earthquakes and how they have affected cities and people.Gifts That Rock
Gifts That Rock - What are the most popular gift items in the store?Largest Hurricanes
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.Naming Hurricanes
Hurricane Names How are hurricanes named? Is your name on the list?Landslides
Landslides A USGS fact sheet about landslides and events that trigger them.Hazard Insurance
Homeowners Insurance and Geologic Hazards Most policies do not cover geologic hazards.Liquefaction
Liquefaction occurs when water-saturated soil is severely shaken and loses strength.Tsunami Causes
What Causes a Tsunami? Learn how plate motions trigger earthquakes and tsunamis.Expansive Soils
Expansive Soil Causes more damage than floods, hurricanes & tornadoes combined.Novarupta
Most Powerful Eruption of the 20th Century - and most people have never heard of it.Geology Dictionary
Geology Dictionary - contains thousands of geological terms with their definitions.Volcanic Explosivity
Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.Abandoned Mines
Abandoned Mines accidents take 20 to 30 lives per year. Many could be prevented.Lightning Hotspot
World Record Lightning - This lake has more lightning than any other place in the world.Volcanoes
Volcanoes Articles about volcanoes, volcanic hazards and eruptions past and present.Largest Tsunami
Largest Tsunami - The wave with the highest run-up was in Lituya Bay, Alaska.Geology Tools
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.Pacific Tsunamis
Pacific Tsunamis This ocean is surrounded by plate boundaries, that can produce tsunami.Rock Fall Photos
Yosemite Rock Fall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn.Lightning Strikes Map
Lightning Strikes Map - shows the worldwide distribution of lightning activity.Atlantic Tsunamis
Atlantic Tsunamis Rare events that can cause damage and threaten millions of people.Yosemite Rockfall
Yosemite Rockfall Hazards have been mapped by the National Park Service.Indian Ocean Tsunamis
Indian Ocean Tsunamis Deadly tsunamis triggered by earthquakes and volcanoes.