An earthquake measuring 6.4 on the Richter scale rocked the Kashmir Valley early Sunday, jolting residents out of their sleep in panic.

"A 6.4 quake struck the Valley at 1.53 a.m. Sunday. The epicentre of the quake was located in the Hindukush region with latitude 36.5 degrees north and longitude 70.8 degrees east," an official of the weather office here said.