The 7.7-magnitude earthquake was recorded at 8:58 a.m. local time on Wednesday (23:58 GMT on Tuesday) near the eastern coast of Taiwan at a "very shallow depth," the agency said without providing further details. The second earthquake was recorded in less than 15 minutes - at 9:11 a.m. local time.
The 6.3-magnitude earthquake was recorded in the same region at 9:35 a.m. local time at a depth of 20 kilometers (12.4 miles) underwater.
China Earthquake Administration stated that a 7.3-magnitude earthquake struck off the coast of Hualien County in eastern Taiwan and was followed by more than 11 earth tremors with a magnitude of over 4.
According to the latest reports, the death toll from earthquakes rose to 9 people while 821 are injured.
Social media users posted videos on X showing that several buildings in Taiwan tilted and were partially destroyed.
Tremors were also felt in the southern Japanese prefecture of Okinawa. After the earthquakes, tsunami warnings were issued for the southern Japanese islands of Okinawa, Miyako and Yaeyama. The agency said tsunami waves could reach as high as three meters (10 feet).
Japanese broadcaster NHK reported that a 0.3-meter-high tsunami wave reached the island of Yonaguni at 9:18 a.m. local time. A small wave also reached the port of Ishigaki at 9:32 a.m. local time.