Twelve minor tremors rocked a subdistrict in the southern province of Surat Thani over two days, with the strongest measuring magnitude 3.5.
Residents in Khao Pang subdistrict of Bang Ta Khun district reported feeling the shaking, but no damage has been reported.
The Geological Disaster Operations Centre of the Department of Mineral Resources reported that between March 8 and 9, a cluster of 12 earthquakes with magnitudes ranging from 1.7 to 3.5 had been recorded as of 5.30am.
The strongest quake measured magnitude 3.5 at a depth of 1 kilometre and occurred on March 8 at 5.41pm.
The centre said the quakes were caused by movement along the Khlong Marui fault, which is oriented in a northeast–southwest direction and moves in a left-lateral strike-slip motion.
The fault is one of Thailand’s active fault lines, stretching across several southern provinces, including Surat Thani, Krabi, Phang Nga and Phuket.
It belongs to a group of faults that run parallel to the Ranong fault system and also move in a left-lateral strike-slip manner, with some reverse vertical movement.
