Hi Petra. It's funny that you should mention this. I have been offline for a couple of days and came by to see what was going on with old Mother Nature. My house pops and settles with temperature changes just like everyone elses, but I noticed something different for several nights prior to the quake in Feb. and last night the same thing started again. A sort of ping ponging back and forth that doesn't normally occur. It might not mean a thing, but I remembered in February wondering why this had changed and if it meant anything and either it was an amazing coincidence or ? Anyway, I woke up around 3am and listened to this for awhile and thought....hmmm....I guess we'll see if it means anything this time. Like I said, it went on for several days before the quake in Feb, so I'm waiting to see if this continues or if it happens today and then stops :-)