At the moment there is heavy earthquake activity taking place in TFZ. With earthquakes taking place every second. Strong earthquakes taking place every 2 to 10 minutes. One earthquake has at least reached the magnitude 5.0 and more earthquake with that magnitude is currently taking place on TFZ.
This earthquake activity can be monitored live (5. min, delay) on my geophone network web page here. I am going to post more information when I have more details.
Update 1: According to USGS the largest earthquake had the magnitude of M4.8. I do not know if this is reviewed data or not. USGS data can be viewed here.
Blog post updated at 01:02 UTC on 21.10.2012.