The PHILIPPINE INSTITUTE OF VOLCANOLOGY AND SEISMOLOGY (PHIVOLCS-DOST)·TUESDAY, OCTOBER 29, 2019· READING TIME: 6 MINUTES, Update as of 29 October 2019. What is happening in Cotabato and vicinity? At 09:04 AM Philippine Standard Time (PST) of 29 October 2019 (Tuesday), another strong earthquake of Magnitude (M) 6.6 shook the province of Cotabato (also known as North … [Read more...] about A Phivolcs primer: The October 29 Magnitude 6.6 Tulunan, NCot Earthquake