Hi Last week i feel my adsense earning dropped sudden to 70 % even click and traffic are same like last month. What will be the issue.. can anyone suggest.
lower paying ads at this time for your niche is what it sounds like. It will always fluctuate. It's normal. it will probably go back and then back down and then back up... ------ edit: removed this part of the comment. yw btw
Adsense CPC's will always vary, remember how the system works in that if Advertisers are not paying as much for ads in your niche then obviously the CPC will decrease.
use Google analytics to find which page has seen very often for next one or two weeks and tweak that page, this might help you to increase earning.
Might be a bad week in your niche. If you aren't seeing a major drop in traffic it has nothing to do with Panda as panda mainly deals with SEO. Keep an eye out for traffic levels and keep us updated.
Adsense ads click rates vary depending on how much the advertisers have put into their advertising campaigns. Hopefully your earnings will revive itself soon. Good luck.