Strange report I noticed on my Google Analytics account - traffic on February 9 just disappeared.

At first I thought I have messed up with my Analytics code on that day, but soon I realized I haven't.

I quickly googled 'Google Analytics February 9' - and fount this thread, explaining, than it's not only me being affected.

Google Analytics glitch

I have no idea will those visitors will return at the end of month or not. 

Update:

On February 15, seems reports are fixed, and missing visitors have returned