A mild tremor measuring 4.2 on the Richter scale rocked central Nepal today.

The aftershock was recorded at 3.52 am with epicentre at Dolakha district, 85 km east of Kathmandu, according to the National Seismological Centre.

About 420 aftershocks with 4 or more magnitude have been recorded following the Gorkha earthquake of April 25 that killed nearly 9,000 people.

A 4.1-magnitude aftershock had been felt with Dolakha epicentre five days ago.