People sensed the tremors caused by three earthquakes in the northern provinces of Chiang Mai and Phrae early Thursday morning.
Chomparee Chompurat, director-general of the Meteorological Department, said that at 1.39am a quake measuring 3.7 on the Richter scale occurred, centred three kilometres under tambon Mae Pan of Long district, Phrae. People felt the tremor in Den Chai, Sung Men and Wang Chin districts.
At 4.36am another quake measuring 4.1 was recorded two kilometres under tambon Mae Khue of Doi Saket district, Chiang Mai. People in Chiang Mai and Lamphun felt it.
At 5.16am a 2.9-magnitude earthquake was recorded, centred one kilometre under tambon Ban Pin of Long district, Phrae. It was noticed by people in tambon Huai Or of Long district.
The Royal Irrigation Department reported that the Mae Kuang Udom Thara dam in Doi Saket district and the Mae Ngat Somboon Chon dam in Mae Taeng district of Chiang Mai were unaffected.