Not sure if its earthquake related but I found a leak today. Its a small one. I have a pvc pipe that connects my main tank to my frag tank and it developed a leak between the o-rings at the union that connects the 2 tanks. It must have been a combination of the oring about the fail or the tank shifting just ever so slightly pulling the.2 pipes apart at the union? Anyway the leak was about 1 drop a second and I didn't notice it till i smelled it yesterday. I visually saw the leak today. Pushed the tank closer by 1/2" and replaced the o-ring and everything is good. Refilling the tank now, I think I lost 4 gallons of water from this leak. Man I was awake when the earthquake struck, shook my bed for a good 5-8 seconds.