Below is link on what to do during an earthquake.  ( This is from FEMA so not sure if it is for concrete homes, but if anyone else has anything more informative to add please do so)

http://blog.allstate.com/be-prepared-hurricane-prevention-guide/

This sight has some information about how to make your home more resistant. See link below.  Please take time to get knowledgeable engineers to look at your homes and suggest solutions for making your home earthquake resistant.
 
http://www.indianconsultancy.com/earthquakeresistant/
 
Regards
 
 
Pass it along to everyone you know.  Awareness is half he battle, E-mail to everyone you know…..just like the chain e-mails you have