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.
1 The cost of calling 0845 numbers consists of the revenue-share premium of 2p/min set by the terminating telco and the markup from 2p to 10p/min added by the originating telco-your phone company (competition regulation, ending soon, prohibits BT from charging more than 5p/min for these calls). The cost of calling 0842, 0843 and 0844 numbers consists of the revenue-share premium from 0.8p to 4.3p/min set by the Terminating telco and the markup from 15p to 40p/min added by the Originating telco-your phone company.