The epicenter of the magnitude 6.3 earthquake was recorded 15 kilometers southwest of Calatagan, Batangas (Photo from Phivolcs)
MANILA, Philippines — State seismologists have recorded 32 aftershocks after the 6.3-magnitude earthquake struck Batangas and nearby Luzon areas on Thursday.
In a bulletin issued at 8 a.m. on Friday, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported that 15 of 32 aftershocks ranging from magnitudes 1.6 to 3.1 were plotted, but none were felt.
“Recorded earthquakes [are] detected and measured by at least one seismic station,” said Phivolcs, adding that using this method, date and time of the seismic event are usually gathered.
“Plotted earthquakes [are] detected and measured by at least three Phivolcs seismic stations,” it furthered, explaining that this helps in identifying the magnitude, location, and depth of the tremor.
The “very strong” 6.3-magnitude earthquake in Calatagan, Batangas at 10:19 a.m. on Thursday caused these aftershocks.
Phivolcs initially reported the quake with a 6.2-magnitude but later upgraded it to 6.3.