(Reopens DES-10) (Reopens DES-10) The Himalayan belt of Uttarakhand and Himachal Pradesh isknown as the earthquake-prone region in the world. "It appears that the first jolt was a main quake whilethe following three are aftershocks. There also appears to bea sequence that the intensity is reducing. "The region is also known to have experienced majorearthquakes in the past," said C P Rajendran from theGeodynamics Unit, Jawaharlal Nehru Centre for AdvancedScientific Research. PTI PR RCJ ZMNRCJ