Recently I found adsense earning has dropped significantly. I almost down to 50%. Anyone facing the problem please reply.
Not really. Maybe the traffic quality has degraded on your site. Get some good traffic and your earnings will increase again.
it may be a combination of things from Google's latest update and overall quality of traffic. You have to consider that from a marketing perspective, the people who are interested in these ads are subject to change. That's why it's a good idea to be really diverse in your ads
Check your traffic stats, if you are down on traffic...., thats your problem and you'll need to generate more.
I think it was due to the traffic coming into your site. More traffic means higher adsense earnings and low traffic means lower earnings. Just always remember that.