The following Flowshart (infographic) will help you find put if your website was hit by a Google Algorithm, whether it was panda or Penguin.
Resources:
1- http://moz.com/google-algorithm-change
2- http://searchengineland.com/library/google/google-panda-update
3- http://searchengineland.com/library/google/google-penguin-update
Resources:
1- http://moz.com/google-algorithm-change
2- http://searchengineland.com/library/google/google-panda-update
3- http://searchengineland.com/library/google/google-penguin-update
