Taipei--A magnitude 4.3 earthquake struck at sea southwest of Tainan in the Taiwan Strait at 12:30 p.m. on Sunday, following a magnitude 5.6 temblor nearly 35 hours earlier, the Central Weather Bureau (CWB) said.
The quake's epicenter was located in the sea about 20.8 kilometers southwest of Tainan City Hall at a depth of 6.0 km, CWB data showed.
A shop saleswoman told reporters she was so scared she ran into the street.
The quake registered an intensity of 3 on Taiwan's 7-tier intensity scale in downtown Tainan, a municipality with a population of 1.88 million.
No casualties or damage were reported.
An intensity of 2 was felt in Yongkang, Qigu, Jiali, Shanhua and districts in Tainan, Kaohsiung's Qishan District to the south, and Chiayi County's Liujiao Township to the north, according to the bureau.
An intensity of 1 was recorded in other parts of Tainan, Kaohsiung, Chiayi County, as well as areas in Yunlin and Changhua counties and Chiayi City, according to the bureau.
Four people were injured in the magnitude 5.6 earthquake on Saturday morning and a power outage caused by the temblor was resolved shortly afterwards.
An expert from the bureau described the earthquake on Saturday morning as a natural release of energy built up as a result of friction between two tectonic plates - the Eurasian Plate and the Philippine Sea Plate.
A magnitude 6.6 earthquake toppled a 16-story residential building in Tainan's Yongkang District, leaving 115 people dead and dozens of others injured on Feb. 6, 2016. Two other people were killed elsewhere in the city.
Source: Focus Taiwan News Channel