Full Idea
There can be explanations without predictions, as when we explain a previous position of Mars from its present one, plus a law.
Gist of Idea
If we say where Mars was two months ago, we offer an explanation without a prediction
Source
Stathis Psillos (Causation and Explanation [2002], §8.9)
Book Reference
Psillos,Stathis: 'Causation and Explanation' [Acumen 2002], p.236
A Reaction
If we don't mind stretching the word, I think we can 'predict' the past, as where I predict the location of an Egyptian tomb from my study of papyruses.