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.
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
The Richter scale is logarithmic. Each whole-number jump indicates a tenfold increase in wave magnitude and a 31.7 increase in energy released. For example, a Richter 9 earthquake has 100 times the magnitude and 1004.89 times the energy of a Richter 7 earthquake.Full Answer >
The three types of earthquake waves are primary waves, secondary waves and surface waves. Primary waves are referred to as P waves, and secondary waves are called S waves. P waves and S waves move past Earth's crust, which is why they are also called body waves.Full Answer >
As of 2014, approximately 1,500 earthquakes strike Japan every year. According to the Royal Geographical Society, there are around 17 magnitude 7 — extremely strong — earthquakes that hit per year.Full Answer >
The type of stress placed on a normal fault is tensional stress. In normal faulting, tensional stress gradually weakens the Earth's crust until the rock cracks, with one crustal block moving downwards relative to its adjacent fault block.Full Answer >