Last year the government issued its first 'megaquake' advisory. Ever since, those living in the areas it's expected to hit have been preparing for the worst.

Two earthquakes struck Calayan, Cagayan early Monday, according to the Philippine Institute of Volcanology and Seismology (PHIVOLCS).

The earthquake was centered near Ninilchik at a depth of 55.5 kilometers (about 34 miles). The USGS said it received 209 ...