MANILA \u2013Philippine Institute of Volcanology and Seismology (Phivolcs) warns of further aftershocks from the 6.7 magnitude earthquake that hit Surigao City and Surigao del Norte Friday night.<\/p>\n
Phivolcs science research analyst Paulo Sawi cautioned against occupying structures already damaged by the earthquake, warning aftershocks can further harm these.<\/p>\n
“People must avoid staying inside and even going near such structures,” he said.<\/p>\n
He urged such precaution, expecting in forthcoming days further aftershocks from the earthquake.<\/p>\n
Such aftershocks would likely be of lesser magnitude than the 89 others Phivolcs reported as of 5 a.m. Saturday but some of these could still be damaging if occurring at shallow depths, he noted.<\/p>\n
“Owners must have their earthquake-damaged structures checked first so repair work can be done if this is still possible,” he said.<\/p>\n
Phivolcs Director Renato Solidum sees need for the public to learn anticipating natural hazards’ consequences and to act on these accordingly.<\/p>\n
“It’s important to be always ready to react correctly,” Solidum said after a magnitude 6.7 undersea earthquake of tectonic origin jolted Surigao del Norte province’s vicinity late Friday night (Feb. 10).<\/p>\n
He noted being knowledgeable and pro-active about earthquakes and other natural hazards can help spell the difference between life and death.<\/p>\n
Latest Phivolcs data show the 10:03 p.m. offshore earthquake this Friday struck 14 kms north 78\u00b0 west of Surigao del Norte’s Surigao City at a depth of 11 kms only.<\/p>\n
Less than an hour after the earthquake struck, Phivolcs said available data indicate this event would unlikely generate a tsunami.<\/p>\n
National Disaster Risk Reduction and Management Council (NDRRMC) said in its situation report 1 released Saturday that the earthquake damaged a bridge as well as several establishments and houses in Surigao del Norte.<\/p>\n
NDRRMC also said families in Surigao del Norte’s capital Surigao City evacuated to higher ground there, fearing possible onslaught of tsunamis.<\/p>\n
Solidum sees nothing wrong with such evacuation even if Phivolcs assured the earthquake won’t generate tsunamis, however.<\/p>\n
He noted the evacuation was still better than having noprecautionary action as occurrence of a “strong” earthquake like Friday’s tremblor is among indications a tsunami might ensue.<\/p>\n
According to Phivolcs, tsunami is “a series of sea waves commonly generated by under-the-sea earthquakes.”<\/p>\n
“Tsunami can occur when the earthquake is shallow-seated and strong enough to displace parts of the seabed and disturb the mass of water over it,” Phivolcs said.<\/p>\n
Phivolcs traced the earthquake to movement of the Philippine Fault Zone (PFZ).<\/p>\n
PFZ is a 1,200 km-long major tectonic feature transecting the Philippines from northwestern Luzon to southeastern Mindanao.<\/p>\n
Two PFZ segments’ strike-slip or horizontal movement against each other triggered Friday’s earthquake, noted Phivolcs science research specialist Mylene Enriquez.<\/p>\n
She noted such movement didn’t displace water so there was no tsunami after the earthquake, however.<\/p>\n
“The earthquake’s magnitude was insufficient to generate a tsunami,” she also said.<\/p>\n
Earlier, Phivolcs said Friday’s earthquake was felt at intensity VI in Surigao City and Pintuyan, Southern Leyte; intensity V in Mandaue City, San Ricardo, Limasawa and San Francisco, Southern Leyte; intensity IV in Hinunangan, Southern Leyte and Butuan City; intensity III in Hibok-Hibok, Camiguin, Tolosa and Tacloban, Leyte, Bislig City,Gingoog City, Misamis Oriental as well as intensity II in Cagayan de Oro City, Talocogon City, Agusan del Sur, Dumaguete City and Cebu City.<\/p>\n
“The earthquake struck at a shallow depth only so this tremblor was felt even in communities already far from its epicenter,” said Sawi.<\/p>\n
Phivolcs also reported instrumental readings of intensity II in Bislig City and intensity I in Cebu City and Cagayan de Oro City.<\/p>\n","protected":false},"excerpt":{"rendered":"
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