Recently Google updated its panda algorithm, PANDA 4.2 in the mid July. Here are some takeaways for you.
>> Panda 4.2 is a site-wide action. Different pages of a website will show different results if hit by panda 4.2 as the very slow and pagewise roll out.
>> This is the slowest ever algorithm update by Google, taking several months and the reason is described as technical but not to confuse webmasters or website owners.
>> There is nothing new about panda 4.2. So the recovery process is same as suggested by google during the first panda update.
You have to wait for several months until the completion of the whole rollout. Else you can check your analytics right away here and check the organic traffic changes for your website. As per Google information, this refresh will only affect maximum of 3% of search queries, which is 2% lower than the previous refresh of maximum 5% in September last year.
Here are couple of more resources: