By Tuesday, we were getting a look at just how big the story was on Twitter and Facebook.
On its blog, Twitter said that 572,000 new accounts were created in the first 24 hours after the disaster. On the first day along, some 177 million tweets were sent.
RELATED: Twitter's #numbers blog
Meanwhile, Facebook created a map which plots status updates about the earthquake and tsunami in the first 12 hours. You can follow the influx of updates as you scroll through their photo gallery and watch the concentration of black dots increase - especially in Japan and neighboring countries and here in the US.
RELATED: Facebook status update map
On March 11th, Facebook says, 3.8 million users from around the globe touched on the disaster, and a total of 4.5 million posts mentioned either the word "Japan," "earthquake" or "tsunami."
For emergency information, assistance, and locating family in connection with earthquake in Japan: http://www.facebook.com/l/6b2e3a9CLMNbUwBsOw1jOL8d5aw/www.jhelp.com
Phone numbers in US and Japan:
202 559 4683
800 373 1110
0570 000 911
011 81 90 7170 4769
011 81 90 3080 6711