OMG. Did you just feel a quake?

OMG. Did you just feel a quake?OMG. Did you just feel a quake? External link

Tweets are being used by the US Geological Survey (USGS) to get instant public reaction to earthquakes. The agency is trawling the messages to find out what people felt during a tremor - whether there was a lot of shaking in their area or not.

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