By HANAH TABIOS There is no threat of tsunami following a 6.3 magnitude earthquake that jolted Calatagan, Batangas on Christmas Day, according to Department of Science and Technology (DoST) Undersecretary Renato Solidum Jr., who is also the director of the Philippine Institute of Volcanology and Seismology (Phivolcs). The earthquake, which is tectonic […]