Update: It turns out that the sudden increase in block reward is due to transaction fees. For example, for TTC block 2372, the block reward is 8008 TTC. However, one transaction pays a transaction fee of more than 58% of the transferred value. This results in a transaction fee of 10000 TTC, which goes to the lucky miner of this block.

See details below:

http://blockexperts.com/ttc/tx/93841752430473b1aec3965de8642f2fbc7edddb043464c4013636010f28f643