How do areas recover after natural disaster? In this work I collected data from publically facing Facebook pages in three
cities affected by different natural hazard events. I developed a statistical framework to transform this data into a
meaningful signal that can quantify the recovery process of region affected by natural disaster. The results are
verified using other indicators and studies of recovery after natural disaster. After publication I collaborated
with the Data for Good team at Facebook to release Facebook Business Activity Trends, used by nonprofits and
aid organisations to target relief.