Right after the Philippine Institute of Volcanology and Seismology (Philvocs) revealed detailed maps of the West Valley Fault Line in 2015, web developers Dominic Tuazon, Louis Michael Concepcion, Mic Gutierrez, Kyle Abughanem, and Emmanuel Soriano got straight to work on a one-stop website that would give a person pertinent details on what to do during earthquakes.

Tremors works like your everyday online search engine. The site was launched quickly in 2015 and ll you need to do is plug in an address to check how far you–or a family and friends–are from the fault line. The Team Instigators also added pins for the nearest evacuation center.

According to a feature on Rappler, the West Valley Fault links 10 major areas together, including Quezon City, Marikina, Makati, Pasig, Taguig, Muntinlupa, as well as some parts of Bulacan, Riza, Laguna, and Cavite. The East Valley Fault, on the other hand, includes Rizal cities, Rodriquez and San Mateo.