This could, however, simply be normal tremors cuased by gravity from the Sun and the Moon. We're due to have a blue moon and a partial eclipse on New Year's Eve.
I hope it will not be too severe.
Edit: I just found this article regarding the sea lions. Their reduced numbers in this season might not be so much of a herald of danger, after all. I'll wait and see. I know a lot of tremors have been occurring in Baja, so...maybe an earthquake is imminent, maybe not.