What is magnitude, how do you measure an earthquake and how does that energy move?

A magnitude 7.8 earthquake struck off the coast of Maasim, Sarangani, on Monday morning, triggering tsunami warnings, damaging infrastructure, disrupting power, communication and transportation servic...

According to Tsunami Information No. 2 released at 3:19 p.m., PHIVOLCS confirmed that tsunami waves were recorded in several coastal areas following the earthquake, which occurred at 7:37 a.m. at a de...