Unlike body waves, surface waves (also known as long waves, or simply L waves) move along the surface of the Earth. Surface waves are to blame for most of an earthquake's carnage. They move up and down the surface of the Earth, rocking the foundations of man-made structures.
No 0844 is not a premium number, not a premium rate number, is not charged at high/premium rates, they are only up to 4.26pence per minute from a BT landline.
The cost of calling 0843, 0844 and 0845 numbers is made up of two parts: an access charge going to your phone company, and a service charge set by the organisation you are calling. The service charge for calls to 084 numbers is between 0p and 7p per minute.