Its just an earthquake FGS, and not that big !
Links to the Networks and a list of Aftershocks are discussed here
www.abovetopsecret.com...
Bam is the location of a major 6.6Mw quake back in 2003, 26,271 people were killed and estimated 30,000 injured
There hasn't been a strong quake world wide for a few weeks.
The magnitudes vary because machines initially do the calculations, then get revised by humans when more details come in, it takes about 15 minutes to
work out the correct location and magnitude.