550084 0000000000000000001e20a14ca3e261abb57dc9c433bb108cbebeb38362b5a6 20:32:04 poolin.com
550085 000000000000000000174f65f0f7e261b79816b220d88f29c5d9f67ce2c804f9 21:30:19 slush
550086 00000000000000000009af5665f97e21c86028f8fad443ecc78792c88a4a496b 21:54:41 slush
550087 00000000000000000018e5b2cda475d948fc26015c0215ac5f95b62bd87c6348 22:19:31 BTC.COM
550088 0000000000000000000437547c2c5fd76b37436c5b5e28d174d2d5a3bbf10078 22:22:27 BTC.COM
550089 00000000000000000002ddeeaa53581b37dd4599651184aa4e8fa925ea520181 22:27:57 BTC.COM
550090 00000000000000000001e8a6e3c6acfbbecaa5a20c0b2807bc29aa4ffdd619cf 23:11:06 BTC.TOP
Are we under attack-51? Does someone mine private chain for reorganizing?
I think this is a normal phenomenon. When the btc price decreased much, the miners won't get break even point profit so they stop mining for a while,
and this will causing the hashrate to decrease. The electricity bill will bigger than the profit of mining if the price of btc continue to dropping.
I believe the hash rate will be back to normal, if the price of btc rising again in the market.