Summary Box: Post-quake tease on social networks

ON THE EAST: People went to Twitter, Facebook and Google Plus with expressions of surprise, worry and sometimes panic over the most powerful earthquake to hit them in decades. People asked on the social networks if it was really an earthquake they just felt.

ON THE WEST: More used to such rumblings, West Coast peers promptly started making fun of them.

WHERE THE NEWS COMES: As with the earthquake in Japan earlier this year, many people first heard about the events on the East Coast through social networks.