Thousands of aftershocks have been recorded in the past months in areas that have recently been rocked by massive quakes such as Cebu and Davao Oriental.
But what exactly is an aftershock?
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) recently described aftershocks "as usually one magnitude lower than the main shock.”
However, the intensity of these aftershocks varies, and they could last for weeks or even months, according to PHIVOLCS.
It can occur by the thousands, as can be seen recently with 1,364 aftershocks now recor
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