high earthquakes

Cao Bang is 4.7 magnitude earthquake
On the morning of November 28, a magnitude 4.7 earthquake occurred in Trung Khanh district, Cao Bang province. This is the 3rd earthquake in 4 days in this area.
Why does Cao Bang experience earthquakes?
Around 7 am on November 28, a magnitude 4.7 earthquake occurred in Trung Khanh district, Cao Bang province with a 10 km deep epicenter. This is the third time this area has had an