Exposure Database Development for Earthquake Impact Assessment of "The Big Ones" Using REDAS: A Basis for Mitigation and Preparedness Plan in Barangay Dolores, San Fernando, Pampanga

Barangay Dolores, City of San Fernando, Pampanga, lies in a seismically active zone, surroundedby “The Big Ones” of Pampanga: the East Zambales Fault (EZF), West Valley Fault (WVF), and IbaFault. Due to its vulnerability, this study developed an exposure database and estimated potential impactsof these fault lines using the Rapid Earthquake Damage Assessment System (REDAS) and GeographicInformation System (GIS) technology. Objectives included simulating earthquake scenarios, assessingearthquake impacts, and supporting the development of a mitigation and preparedness plan. Buildingfootprints and attributes were collected through a foot survey and street view analysis, then processed inREDAS to simulate impacts from the three faults. Results showed the EZF (Mw 7.4) posed the greatestthreat, predicting PEIS Intensity VII (Destructive), 22 fatalities, 12 life-threatening injuries, and ₱8.2billion in losses. The WVF (Mw 7.2) and Iba Fault (Mw 6.6) showed lower impacts. A GIS-basedevacuation map was created and validated through a focus group discussion with barangay officials andstakeholders, confirming its value in preparedness and disaster resilience.