Rod of God would be a much larger quake, I would think...
Could have been a little Rod
It would have to be a BIG rod. The ones postulated in the 2003 Air Force study were 1 ft. diameter x 20 ft. long, impacting at Mach 10, and delivering about 11.5 tons of TNT. A magnitude 5 earthquake would be around 200 tons of TNT.