This was a year or two ago. I mentioned it to people, but most people do not seem to realize it and I did not either until I was actually up and heard it when it happened.
I think when one is asleep and a loud noise like that happens, it works its way into your consciousness and you wake up, sometimes all the way, but by the time you do you really do not know why, and it may be that you only come out of a very deep sleep and then whatever caused it is gone. Now I believe on a normal night we get passed over 1 to 3 times sometimes loud enough to rattle windows according to my neighbor.
If you scout the web you can see all kinds of studies about correlations of bad sleep and health effects, noise from airplanes and bad sleep, and airplane noise directly contributing to bad health.
What I'm hoping to find out from you is:
1) Do other people notice, perceive this? Have you noticed yourself waking up at night and not knowing why, or is your sleep disrupted?
2) Is this a problem for you? Would it be if you were aware that your sleep patterns and health were being affected by airplane noise?
3) What at airplanes doing flying over Palo Alto anyway, why can't they detour into the mountains or over the bay, or fly higher?
4) Does anyone know what the relevant regulations or laws are on this. I'm assuming many of these flights are from Asia coming in with large planes and flying very low. I do not recall this before maybe the last 5+ years, and I believe it is a problem and not right. I also expect there are regulations that are not being observed or enforced in order to save gas or time for airlines and it is the wrong decision to allow this to continue.