๐ฃ๐๐๐๐๐ฃ๐ฃ๐๐ก๐ ๐๐๐จ๐๐ง ๐ญ๐ข๐ก๐
The 16 July 1990 Magnitude 7.8 Luzon Earthquake was generated by the rupture of the Digdig Fault segment of the Philippine Fault Zone (PFZ) in Nueva Ecija. The Luzon earthquake is just one of the historic quakes generated along the massive PFZ, so what is it really?
The Philippine Fault Zone (PFZ) is far more than a single fault. It is a ๐ญ,๐ฎ๐ฌ๐ฌ-๐ธ๐ถ๐น๐ผ๐บ๐ฒ๐๐ฒ๐ฟ-๐น๐ผ๐ป๐ด ๐ฎ๐ฐ๐๐ถ๐๐ฒ ๐๐ฒ๐ฐ๐๐ผ๐ป๐ถ๐ฐ ๐๐๐๐๐ฒ๐บ ๐๐ต๐ฎ๐ ๐๐๐ฟ๐ฒ๐๐ฐ๐ต๐ฒ๐ ๐ณ๐ฟ๐ผ๐บ ๐ป๐ผ๐ฟ๐๐ต๐๐ฒ๐๐๐ฒ๐ฟ๐ป ๐๐๐๐ผ๐ป ๐๐ผ ๐๐ฎ๐๐ฎ๐ผ ๐๐๐น๐ณ.
Several densely populated cities, including #Baguio, #Masbate, #Ormoc, and #Surigao, are located near the PFZ, placing millions of people at risk from strong ground shaking, surface rupture, and related earthquake hazards.
Moving at an estimated 2โ2.5 centimeters per year, this left-lateral strike-slip fault continually accommodates tectonic stress from the movement of the Philippine Sea Plate.
It has produced several major earthquakes, including the 1973 Ragay Gulf (M7.0), 1990 Luzon (Mw7.8), and 2003 Masbate (Ms6.2) events, making the PFZ one of the most significant earthquake-generating structures in the Philippines.
