Not usually. Although the vortex must touch the ground in order to be considered a tornado, most tornadoes form within the clouds of a thunderstorm and extends downwards. Though often a developing tornado is not highly visible until it reaches the ground and starts lifting up dust.
However, landspouts are a type of tornado that form from the ground up and connect to the base of a thunderstorm, usually one in the developmental stages.
No.
Since the majority of earth is covered by sea, it is likely to assume that the majority of earthquakes occur under water, the seafloor.
Absolutely most earthquakes occur at the fault-lines of earths tectonic plates.
Earthquakes under water can cause massive waves (tsunami's) and this is an added danger down by the sea in many countries.
Yes, in fact, tornadoes alley, which gets the most tornadoes of any place in the world, is mostly flat.
No, tornadoes can form in hills and mountains as well.
No. There is no shortage of tornadoes that have moved over hills and mountains.
Many of the area frequented by tornadoes are flat. But there are a number of tornado prone areas that are hilly.
Tornadoes can go over hills and mountains.
Tornadoes can form in just about any sort of terrain.
They often do, but they can also form over hilly and even mountainous terrain.
Hills and mountains can, to some degree, disrupt thunderstorms from organizing, making tornadoes less likely. Overall, through, tornadoes are more influenced by climate than topography. It just so happens that the most tornado-prone region in the world, the central U.S., is also quite flat.
They can touch down on both flat and rough land.
Tornadoes are commonly observed on the Great Plains.
Many of the area frequented by tornadoes are flat. But there are a number of tornado prone areas that are hilly.
Tornado Alley.
Tornadoes can form in just about any sort of terrain.
Tornadoes can go over hills and mountains.
Yes Tornadoes can happen Africa. They can take place anywhere in the world, even in water (warm water) called waterspouts. It doesn't matter how flat the land is, tornadoes can still occur-anywhere at anytime.
They often do, but they can also form over hilly and even mountainous terrain.
Not usually. Most tornadoes form over land.
Yes. Tornadoes have formed on oceans and lakes (in whic case they are called waterspouts) and come onto land.
Hills and mountains can, to some degree, disrupt thunderstorms from organizing, making tornadoes less likely. Overall, through, tornadoes are more influenced by climate than topography. It just so happens that the most tornado-prone region in the world, the central U.S., is also quite flat.
Tornadoes are generally considered a land based phenomenon. There are however waterspouts which are essentially tornadoes on water, though they are generally not counted as tornadoes unless the hit land.