Once again, Twitter is proving a crucial tool for people around the world to communicate and connect. Fast on the heels of protests in the Middle East organized with the help of Twitter, now the communication is all about the 8.9-magnitude earthquake and following tsunami in Japan.

No surprise, cell phone networks were overloaded and service spotty following the quake — NTT DoCoMo restricted up to 80 percent of voice calls — Twitter proved a valuable communication tool.