|Photo of the Day: Seismograph Image of Japan 6.8 Quake|
|Written by Wayne Walden|
|Thursday, 15 March 2012 09:37|
The PTHS seismograph detected an 6.8 magnitude earthquake off the east coast of Honshu, Japan, yesterday at 9:08 a.m.
An earthquake wave can travel from its point of origin to the other side of the earth in only 20 minutes and be detected.