BEIJING, July 12 (Xinhua) - A 5.1-magnitude earthquake jolted Guye District of Tangshan City in north China's Hebei Province at 6:38 am Sunday Beijing Time, according to the China Earthquake Networks Center (CENC).

The epicenter was monitored at 39.78 degrees north latitude and 118.44 degrees east longitude, with the quake striking at a depth of 10 km, the CENC said.

Strong tremors were felt in the nearby regions including Beijing.

A 2.2-magnitude quake hit the district again at 7:02 am Sunday.

No casualties have been reported so far.

Firefighters have been dispatched to the district. The railway department immediately launched the emergency plan to suspend passenger trains passing through the area, and is organizing a comprehensive inspection of railway equipment and facilities.

A 7.8-magnitude quake jolted Tangshan in 1976 and killed more than 240,000 people.  ■