aThere are five categories of hurricanes, which are based on wind speeds. The categories help people know how much damage(危害) a hurricane may cause because the greater the wind speed, the more dangerous the storm. For example, a Category 5 有飓风五个类别,根据风速。 类别帮助人民知道多少...
Categories(类别)of Hurricanes There are five categories of hurrlcanes, which are based on wind speeds. The categories help people know how much damage(危害)a hurricane may cause because the greater the wind speed,the more dangerous the storm.For example,a Category 5 hurricane has winds over...
TheAtlantic hurricane seasonbegins on June 1 and runs through Nov. 30 and onaverage, the Atlantic basin sees about seven hurricanes and three major hurricanes a year. On theSaffir-Simpson Hurricane Wind Scale, a major hurricane means a Category 3 or higher. The scale includes five categorie...
Both Saffir and Simpson have said that there’s no need to add more categories because once things go beyond 157 mph, the damage all looks the same: really, really bad. Still, that hasn't stopped several scientists from suggesting that maybe the time has come to consider a Category 6 add...
When the work hours begin, over 1,000,000 people use the London underground(地铁), but there are still too many buses and cars on the streets. The air isn't clean.For me, the best things about London are the parks. There are five in the middle of the city. But my children's ...
According to the Saffir-Simpson scale, here are the sustained winds linked to categories 2 through 5 hurricanes: Category 2: 96 to 110 mph (154 to 177 km/h) Category 3: 111 to 129 mph (178 to 208 km/h) Category 4: 130 to 156 mph (209 to 251 km/h) Category 5: 157 mph or ...
Understand Hurricane Categories: What Does a Category 1 Hurricane Mean? You May Like Understanding the Categories of Hurricanes Explore More Forces of Nature Four Years After Hurricane Michael: Revisiting the Devastation of Category 5 Storm Forces of Nature 10 Worst Nor'easters of All Time Forc...
New hurricane categories? Hurricanes are graded on the Saffir-Simpson scale, which ranges from Category 1 (starting at sustained winds of 74 mph, or 119 km/hour winds) to a Category 5 (starting at sustained winds of 157 mph, or 252 km/hour winds). This scale is incomplete, as it is ...
The elite, ground-based firefighters fit into two categories: Hotshots - Working in 20-person teams, the main job of these highly trained firefighters is to build a firebreak around the fire to keep it from spreading. A firebreak is a tract of land that has been stripped of any possible ...
There are many sorts of explosive eruptions, varying significantly in size, shape and duration. Types of Eruptions A tall Plinian plume erupts from Klyuchevskaya Volcano in Russia. Photo courtesy NASA Within these two broad eruption categories, there are several typical eruption varieties. ...