The Kashmir valley was hit by a 6.8-magnitude earthquake this afternoon. The quake shook houses and buildings in the region and sent panicked residents rushing out for safety. An official of the state Meteorological Department said the tremor was of 6.8 magnitude and its epicentre was located at a depth 190 km in the Hindu Kush region of Afghanistan. The earthquake was recorded at 3.38 pm. There was no immediate reports about damage or casualties caused by the tremor. Kashmir has been hit by a series of high-magnitude tremors over…