After the 6.3 magnitude quake that hit North Cotabato at past 7 last night, another 5.2 magnitude shook Davao Oriental at around 5 this morning.
A 5.3 magnitude trembler also hit Davao Occidental at past 9 A.M.
But the Philippine Institute of Volcanology and Seismology says the earth tremors are unrelated.
Department of Science and Technology Undersecretary Renato Solidum explains that the earthquake that hit Manay, Davao Oriental was deeper at 110 to 120 kilometers due to the movement of the Philippine Trench.
The shakers in Tulunan, North Cotabato and Abad Santos, Davao Occidental were tectonic in origin with a depth of 15 and 61 kilometers, respectively.
Solidum also cautions that there are aftershocks after strong earthquakes and advises the public to stay away from damaged buildings and houses until properly checked by engineers. Participating in drills will also be a big help in preparedness.
