(CNN) — A 6.6-magnitude earthquake with a depth of 10 km struck the city of Kangding in southwest China’s Sichuan province on Monday, the United States Geological Survey (USGS) reported. English). More than a million residents experienced moderate shaking after the quake, including in the nearby city of Chengdu, the USGS said. Minutes later, a second 4.2-magnitude earthquake struck the city of Yaan, near Luding, according to the China Earthquake Network Center. So far no victims have been reported. In 2013, Yaan was hit by a strong earthquake that killed more than 100 people and injured thousands. With information from Reuters