"Did You Feel It?" provides an opportunity for people who experience an earthquake to share information about its effects to help create a map of shaking intensities and damage.

By taking advantage of the vast numbers of Internet users, the project garners a more complete description of what people experienced, the effects of the earthquake, and the extent of damage. The resulting “Community Internet Intensity Maps” contribute greatly to the quick assessment of the scope of an earthquake emergency and provide valuable data for earthquake research.