BAGUIO CITY, Philippines?Residents here were awakened from sleep on Friday when a magnitude 5 earthquake rocked this mountain city and nearby areas, a day after three mild tremors hit the summer capital.
The quake, felt at Intensity 4 in this city, struck at 6:20 a.m. Its epicenter was 9 km northwest of La Trinidad, Benguet, a bulletin from the Philippine Institute of Volcanology and Seismology (Philvolcs) said.
There were no reports of injuries or damages to buildings.
Students, still in their pajamas, were seen rushing out of dormitories and boarding houses in Barangay Trancoville when the quake struck.
The tremor was also felt in San Fernando City in La Union at Intensity 3 and in Burgos, Ilocos Sur, at Intensity 2.
On Thursday, three earthquakes struck the summer capital and its neighboring towns. A magnitude 3.3 quake first jolted the city at 11:54 a.m. It was felt at Intensity 2 and its epicenter was traced at 8 km northwest of La Trinidad.
This was followed by two successive earthquakes at 2:25 p.m.?at magnitude 3.1 and magnitude 3. Their epicenters were traced 7 km southeast and 13 km northeast of Baguio, respectively.
The quakes occurred hours after the Office of Civil Defense mounted disaster drills nationwide.
In Pangasinan, the OCD and Philvolcs conducted a simulated tsunami drill in Patar village in Bolinao town. The drill was participated in by students, barangay officials and residents.
Bolinao and other western coastal towns in the Ilocos are vulnerable to tsunami because of the Manila Trench in the South China Sea, Philvolcs said.
Phivolcs warned that aftershocks could be felt after the tremors hit around 6:20 am.
Phivolcs said earthquakes listed as 5 on the Richter Magnitude scale are of ?moderate strength? and felt in a wide area.
Phivolcs data said Friday?s earthquake was the fourth that Baguio felt in a matter of hours.
Baguio was struck in 1990 by a magnitude 7 quake that killed hundreds of people and left a wide swath of devastation.
Later in the evening, two more magnitude 3 earthquakes were felt in Baguio City. Vincent Cabreza and Yolanda Sotelo, Inquirer Northern Luzon