MANILA - A magnitude 4.4 earthquake struck Cotabato on Thursday evening, several hours after a powerful tremor rocked parts of Mindanao.
The quake hit Tulunan town, the same general area of the previous three temblors, at 8:42 p.m. Thursday.
At least 5 were killed in Tuesday's earthquake, while 1 was confirmed dead in Thursday's magnitude 6.5 tremor.
The latest quake, which was tectonic in origin, had a depth of 66 kilometers.
Phivolcs did not say if the quake was an aftershock of the magnitude 6.5 or magnitude 6.6 tremors that occurred just days apart.
Instrumental Intensity IV was reported in Kidapawan City while Intensity I was experienced in Malungon town, Sarangani.
State seismologists earlier said the third earthquake would not spawn a tsunami but would cause aftershocks.