In Mizoram, two moderate earthquakes occurred within an hour with magnitudes of 4.2 and 4.5 on the Richter scale have jolted some parts of south-eastern district, Champhai at midnight. According to the National Centre for Seismology, the tremor of 4.2 occurred at 12.45 am and a tremor of 4.5 magnitude occurred at 1.14 am today.<br />'' <br />'' The epicentre of the earthquakes was south of Champhai. There is noimmediate report of damage. According to the officials, the district has experienced a series of tremors during the last few days. Local<br />'' sources said that many residents of the district headquarters had a sleepless night during the last two days with a series of mild tremors, which are regarded as aftershocks of the Monday earthquake of<br />'' 5.5 magnitude. Officials further said, a fact-finding team comprising geologists have reached Champhai to study the multiple aspects of the tremors.<br />