Oh, XKCD might have something to say...
Twitter has beaten instruments to the punch at the US Geological Survey – but the geeks at the country’s lead earth-sciences agency are perfectly happy. Launched last year to distribute earthquake information, the USGS has found its Tweet Earthquake Dispatch (TED) to be equally effective at receiving on-the-ground posts about …
Suppose it is useful for one thing then, if you have followers?
The first time I've heard of Twitter's possibly being useful.
Some bunch of TWITS decides to start spoof-tweeting
in New Zealand that the most sensitive device ever invented for detecting the effects of an earthquake was the telephone exchange. The longer it's overloaded, the bigger the quake was.
I didn't believe that until I was working in one and saw how much it lit up before the rumble of a very small (richter 4.2 or thereabouts) shake had even finished. It really does seem that everyone wants to ring all their friends/neighbours to compare notes.