About 100 people inside a shopping mall in Tagum city, in the adjacent province of Davao del Norte, were hit by falling glasses and plates as they fled the building, said Jay Suaybaguio, the provincial information officer.
“I was on the third floor buying office supplies when the quake suddenly struck,” Suaybaguio told AFP.
“When we reached the first floor we saw broken bottles of wine and condiments. The lights went out but emergency lights turned on, helping us to find our way.”
Photos posted on the Facebook page of the Davao del Norte disaster agency showed collapsed ceiling sections inside the Tagum shopping mall, which it attributed to “the series of earthquake incidents”.
The Davao del Norte government suspended work and classes on Tuesday and Wednesday to allow for inspections of public buildings and infrastructure.
The first quake lasted about 30 seconds and was followed by aftershocks, said Corporal Stephanie Clemen, a police officer in Tagum, about 40km from Maragusan.
“We immediately went under our desks and when the ground stopped shaking we went straight outside,” Clemen told AFP.
“We are still outside because a moderate aftershock just hit.”
While the quake did not appear to have destroyed anything, Clemen said, it was strong enough to “cause fear”.
Quakes are a daily occurrence in the Philippines, which sits along the Pacific “Ring of Fire”, an arc of intense seismic and volcanic activity that stretches from Japan through Southeast Asia and across the Pacific basin.
Most of the earthquakes are too weak to be felt by humans, but strong and destructive ones come at random with no technology available to predict when and where they will happen.
The nation’s civil defence office regularly holds drills simulating earthquakes along active fault lines.
The last major quake was in the northern Philippines in October.
The 6.4-magnitude earthquake hit the mountain town of Dolores in Abra province, injuring several people, damaging buildings and cutting power to most of the region.
A 7.0-magnitude quake in mountainous Abra last July triggered landslides and ground fissures, killing 11 people and injuring several hundred.
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