Scientists are working on testing this claim in central Italy, where a destructive earthquake struck last year and lots of minor seismic activity is still present.

The article is pretty informative, I just like to report here the closing remark from the Principal Investigator: "It’s a huge claim, so we’d better have good proof for it".

https://www.nytimes.com/2017/06/17/world/europe/italy-earthq...