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Geologic Hazards



USGS: Latest Earthquakes

A complete portal to earthquake information and maps of all kinds. Continuously updated by the United States Geological Survey.

Smithsonian Global Volcanism Program

The Global Volcanism Program of the Smithsonian Institution has a fantastic online resource for basic information about the world's volcanoes. They have a database of detailed pages for thousands of volcanoes, a collection of space images, popular FAQs, image and video galleries, and much more.

National Hurricane Center

Their website has a map of tropical cyclones and disturbances that is updated multiple times per day - in addition to lots of other hurricane information.

Live Lightning Maps

One of the most ingenious websites. LightningMaps.org has maps showing the geographic distribution of lightning across the world in near-real-time. Strokes of lightning pop onto the map as red circles. Thunder emanates from some lightning strokes as a white halo that expands outward at the speed of sound (they are the sound front of thunder). The circles then fade to yellow, then brown, then disappear over time. Click the map above to visit the website. You gotta see this - especially when big lightning is happening outside and you are safe on your couch.

Global Subsidence Map

If you have any interest in land subsidence, you probably should know about this interactive map. It is the UNESCO Global Subsidence Map published by Herrera-Garcia et al. in Science (2021). Click the map above to view.

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