The horses are naturally aware of things like this. A strong importer told me back in the day that after horses are moved to and from earthquake area's it requires time for the horses to relax and get the rest that's required both physically and mentally. The guys that understand the horses natural environment affects their performance are the ones that make money with their new aquasitions from their distant counterparts! Every single weather or ground change will peak the "Spiddy senses "!