Based on the customers in my Health Food store, I believe that Eat is right. Before large EQ's, people start showing up with vertigo, and ear ringing. The story is usually along these lines, I have been to the Dr. and they can find nothing wrong with me yet I can barley walk upright due to vertigo. The number of poeple I have seen in the last couple of weeks with this problem is very high. I have been in business for 24 years and know that this always precedes a large quake.