7/9/2011 -- NEGATIVE earthquakes? -0.3 and 0.0 ?!

7/9/2011 -- NEGATIVE earthquakes? -0.3 and 0.0 ?! ...DIRECTLY at HAARP facility AK, Canada border
From: dutchsinse | Jul 9, 2011
http://www.youtube.com/user/dutchsinse#p/u/1/hOv5xh85rPw
Thanks dutchsinse, for bringing this to our attention. i know what causes a earthquake but a negative, it doesn't make sense to me. But i haven't been schooled yet lol, hoping someone can let me know.

http://quakes.globalincidentmap.com/

Thursday July 7 2011, 23:27:54 UTC Canada magnitude: -0.3 depth: 178.0

Friday July 8 2011, 01:37:44 UTC Canada magnitude: 0.0 depth: 236.0