Tectonic quakes shake Davao del Sur province » Manila Bulletin News

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By Mike Crismundo 

Mild tectonic earthquakes jolted Davao del Sur province Thursday morning, (Aug. 31, 2017) the Philippine Institute of Volcanology and Seismology (Phivolcs) said.

(AFP Photo/Frederick Florin) / MANILA BULLETIN)

However, the Office of Civil Defense (OCD) and Regional Disaster Risk Reduction and Management Council (RDRRMC) in Southern Mindanao region reported no damage or injury in the series of tectonic quakes that struck Davao del Sur province on Thursday.

Of the eight mild tectonic earthquakes that shook the province of Davao del Sur on Thursday (Aug. 31), a 4.0 magnitude earthquake was the strongest and it was registered at 1:31 a.m., Phivolcs said.

The epicenter was traced 27 kilometers (km) northwest from the town proper of Sta. Cruz, Davao del Sur province, Phivolcs said.

The earthquake had a shallow depth of only 5 km, it said.

Intensity lV was registered in Santa Cruz, Davao Del Sur; Davao City; and Hagonoy, Davao Del Sur while Intensity lll was also recorded in Sulop, Davao Del Sur and Intensity ll in Digos City, Davao Del Sur and Kidapawan City.

At 1:45 a.m. on the same day (Aug. 31), a 3.0 magnitude earthquake was also recorded, Phivolcs said.

The epicenter was plotted only 7 km. northeast of nearby Digos City, also of Davao del Sur province, the agency said.

The tremor had a depth of 20 km, Phivolcs said.

The agency also recorded 6 other mild tremors from 1.8 magnitude to 2.4 magnitude earthquakes that struck Digos City, Davao del Sur province of the same day.

The 8 tremors that jolted the province of Davao del Sur on Thursday morning were all tectonic in origin, Phivolcs added.

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