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'Liquefaction' caused ground fissures in quake-hit Sarangani — Phivolcs

Philippines | National

'Liquefaction' caused ground fissures in quake-hit Sarangani — Phivolcs

By Lizst Torres Abello

The Philippine Institute of Volcanology and Seismology (Phivolcs) had reported formation of fissures or long narrow cracks on the ground in Glan, Sarangani following the magnitude 6.8 earthquake on Nov. 17.

(Phivolcs)

Phivolcs Director Teresito Bacolcol on Tuesday, Nov. 21 said the ground fissures were caused by the liquefaction, which usually occurs in sandy areas near rivers and coastlines.

"Dahil sa malakas na groundshaking usually sustained for 30 seconds or more, sand particles will settle down at iyong umaangat ay tubig (Because of strong ground shaking usually sustained for 30 seconds or more, sand particles will settle down and the water rises)," said Bacolcol in a televised briefing.

Meanwhile, he said the magnitude 5.2 earthquake in Samar on Nov. 20 had no connection with the magnitude 6.8 earthquake in Sarangani on Nov. 17.

He also noted that the recorded aftershocks from the magnitude 6.8 earthquake in Sarangani on Nov. 17 will last for several days or weeks but may be "weaker."

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