MANILA - A magnitude 6.5 earthquake that rocked Davao Oriental province on Saturday left no major damage, but highlighted the country's vulnerability to seismic events.

The Philippine Institute of Volcanology and Seismology (Phivolcs) has developed a web application that maps the many faults that crisscross the country.

• READ: No tsunami threat, significant damage from Davao quake: officials

According to the PHIVOLCS Fault Finder, Davao Oriental is closest to the Mati section of the Philippine fault.

The app is accessible using a desktop or mobile browser. It uses three base maps--the Philippines Geoportal from NAMRIA, Google Maps, and OpenStreet.

The app can be useful for land-use planning, risk assessment, disaster risk reduction planning, and can help increase public awareness on faults, PHIVOLCS said in a statement.

PHIVOLCS developed the app with the Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Japan.

Japan, like the Philippines, is located on the Pacific "ring of fire," a hotspot for seismic activity due to many volcanoes and fault lines.