Meanwhile in Korea...
13 Bithumb BTC/KRW $253,960,000 *
$17,345.40 1.56% Recently
29 Korbit BTC/KRW $120,532,000 *
$17,295.60 0.74% Recently
42 Coinone BTC/KRW $83,604,400 *
$17,297.50 0.51% Recently
That's mt-gox-like activity where traders are fleeing a dying exchange using bitcoin and either cant or prefer not to use fiat, and arbitrage channels are broken.