A typhoon is the name given to a tropical cyclone that forms in the northwestern part of the Pacific Ocean. Hurricanes, typhoons and cyclones are all names for the same type of storm, and different names are used based on where the storm originates.Know More
Tropical cyclones that form in the eastern Pacific or the Atlantic Ocean are termed hurricanes, while those that occur in the Indian or south Pacific oceans are simply called cyclones. Despite the difference in names, these terms all refer to a specific type of organized, rotating weather system of clouds and thunderstorms. These cyclones occur around the world in a band that stretches approximately 300 miles north and south of the equator, as the specific conditions required for their formation can only occur in subtropical or tropical waters. As of 2014, only one tropical cyclone has ever been recorded in the southern Atlantic, Hurricane Catarina, which struck the coast of Brazil in 2004.
All of these storms are first classified as a tropical storm until they grow large enough to produce an average sustained wind speed over 74 mph, after which they are given a specific name based on their location. The names are selected in alphabetical order from the list for each region, with a new list of names being used each year.Learn more about Earthquakes
Earthquakes occur when two blocks of earth suddenly slip past each other. This sudden release of energy causes the seismic waves that make the ground shake. The surface where they slip is known as the fault or fault plane.Full Answer >
Earthquakes are usually triggered when rock located beneath the ground, on top of fault lines, breaks and suddenly releases a significant amount of energy. The immediate and rapid release of energy caused by earthquakes generates seismic waves, which cause shaking motions that start below the Earth’s surface and spread across large distances.Full Answer >
Earthquakes happen daily across the United States, though they vary in magnitude. For instance, the United States had 3,836 earthquakes in 2012, but only five of them were above six on the Richter scale, and none of them exceeded seven.Full Answer >
Most earthquakes occur along the boundaries between the Earth's tectonic plates. The crust of the Earth is divided into plates. When a plate collides with or slides past another plate, this causes earthquakes. For example, as the Pacific plate moves past the North American plate, many earthquakes occur along the coast of California.Full Answer >