Show:
Hurricanes
Tsunamis
Torandos
Volcanoes
Earthquakes
100
The minimum wind speed (mph) for a storm to be classified as a hurricane according to the Saffir–Simpson hurricane wind scale.
What is 74mph?
100
This is the 25,000-mile horseshoe-shaped area where close to 80 percent of tsunamis happen.
What is the Pacific Ring of Fire?
100
Between the evening hours of 3:00PM and 9:00PM.
What is when a tornado is most likely to occur?
100
These volcanoes are also called "sleeping" volcanoes because they are presently inactive, but could erupt again. Mauna Kea in Hawaii, Mount Fuji in Japan, and Mount Rainier in Washington are examples of these.
What is a dormant volcano?
100
This 240-mile mountain range runs north to south through Northern Utah, and like all ranges it was produced by earthquakes. Many different segments make up the range, each capable of producing up to a magnitude 7.5 earthquake.
What is the Wasatch Range?
200
Hurricanes rotate in this direction when in the Northern Hemisphere.
What is counter-clockwise?
200
In 2004, this tsunami was caused by an earthquake that is thought to have had the energy of 23,000 atomic bombs. Killer waves radiating from the epicenter slammed into the coastline of 11 countries, killing 283,000 people.
What is the Indian Ocean tsunami?
200
This area is considered to have the most tornado activity in the United States, centered in the Plain states and reaching from eastern Colorado to Nebraska.
What is Tornado Alley?
200
These are hot fragments of rock and magma emitted during an explosive eruption.
What are pyroclastics?
200
The measure of the amount of energy released during an earthquake. To calculate, the amplitude of waves on a seismogram is measured, correcting for the distance between the recording instrument and the earthquake epicenter.
What is magnitude?
300
Considered the most deadly area of a hurricane, this area is composed of a dense wall of clouds and can produce winds more than 150 mph.
What is the eyewall?
300
This part of the tsunami wave arrives first, causing the ocean to recede. This is one of nature's warning signs that a wave is on the way.
What is the trough?
300
A tornado over water – smaller and weaker than a Great Plains tornado, this phenomenon can still be quite dangerous.
What is a waterspout?
300
The most common type of volcano. They are also the smallest type, with heights generally less than 300 meters. They have straight sides with steep slopes and a large summit crater in at the top. This volcano has a Strombolian eruption, which produce eruptive columns of basalt tephra that are usually a few hundred meters high.
What is a Cinder Cone volcano?
300
This type of fault is when rocks on either side of the fault move past each other sideways with little up or down motion. These produce vertical (or nearly vertical) fractures where the blocks have moved mostly horizontally.
What is a strike-slip fault?
400
The deadliest U.S. hurricane on record was a Category 4 storm that hit on Sept. 8, 1900. Some 8,000 people lost their lives when this island was destroyed by 15-foot waves and 130-mile-an-hour winds.
What is the island city of Galveston, Texas?
400
This time period between waves which can last between a few minutes and two hours. The first wave is usually not the strongest, and later waves, such as the fifth or sixth, may be significantly larger.
What is the wave period?
400
The Fujita Scale, which rates tornadoes F1-F5, was renamed to this in 2007 by the National Weather Service in an effort to take into account more variables in rating tornadoes.
What is What is the Enhanced Fujita Scale?
400
These are the most explosive volcanoes. However, they do not look like typical volcanoes, in that they leave a crater after they erupt. Yellowstone in Wyoming and Lake Taupo in New Zealand (which erupted around A.D. 80) are both examples of these.
What is a Rhyolite Caldera Complex?
400
The name of seismic body waves that travel deep in the Earth before rising to the surface. They compress and expand the ground like an accordion, are always the first waves to arrive, and do little or no damage.
What are P waves? (Primary or Pressure)
500
These are domes of water produced by the action of cyclonic wind during a hurricane, in which the seal level can be up to five meters higher than normal.
What is a storm surge?
500
The maximum height of the tsunami wave above normal tide level, and a measure of how far inland the wave reaches beyond the normal shoreline.
What is the run-up and run-in?
500
The least common, must most severe type of thunderstorm, including damaging winds, very large hail, and sometimes weak to violent tornadoes. These thunderstorm types contain a deep and persistent rotating updraft called a mesocyclone.
What are supercells?
500
Between 300,000 to 600,000 years old, the world’s most active volcano, is this “shield” volcano located in the Hawaiian Islands.
What is Mt. Kilauea?
500
This phenomenon occurs when an earthquake's violent shaking suddenly turns loose, soft soil into liquid mud.
What is liquefaction?