As of noon, there had been no reports of damage or injuries as a result of the three quakes.
The 4.7-magnitude temblor, which occurred at 10:52 a.m., was centered 22.6 km northeast of Hualien County hall at a depth of 11.1 kilometers, the bureau said.
The quake was felt in in Heping and Taroko in Haulien County and Nan'ao in neighboring Yilan County at an intensity of 3, and in Hualien City, Hehuanshan in central Nantou County and Techi in neighboring Taichung at an intensity of 2.
It was one of three earthquakes that shook eastern Taiwan early Monday morning, with the other two rattling Taitung County.
At 1:48 a.m., a 4.2-magnitude earthquake occurred 37.1 km northwest of Taitung County hall at a depth of 5 km. The strongest intensity recorded was 3, in Lidao.
At 6:09 a.m., a second temblor hit, measuring 4.3 on the Richter scale and centered 41.8 km northeast of the Taitung County hall at a depth of 20.7 km. It was recorded in Chishang at an intensify of 3 and in Taoyuan District in Kaohsiung at an intensity of 1.
The three temblors all occurred in quake-prone areas and were just a normal release of energy, the weather bureau said, urging the public not to panic. It would be much more worrisome if no earthquakes occurred in such areas, it said. (By Flor Wang)