Twitter Used to Collect Accounts of Seismic Activity
TED,Twitter Earthquake Detector, uses an application programming interface that aggregates tweets based on keywords — like "earthquake" — to pull tweets about a particular earthquake into a database. This information is then combined with the magnitude and epicenter observations to provide short little snippets about what people felt in the earthquake and what people experienced. READ MORE
USGS already operates the "Did You Feel It?" site to collect observations from the public.