The quake hit the city at 4:17 AM local time with its epicentre at a depth of 539 km, the China Earthquake Networks Center said. Most people in the city slept through the quake, state-run news agency said.

An official from the earthquake bureau in Yanbian Korean Autonomous Prefecture said the quake was deep-focussed and would not be felt or cause damage. Huichun is on the only deep-focus earthquake belt on China's mainland.

Quakes in this region generally have a focus depth of more than 500 km. Only earthquakes occurring at a depth of less than 70 km are considered "shallow", officials said.


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