Quake sound track

Once the rumbling and smashing sound of a large quake stops, other sounds fill the air. Car alarms, cell phone ring tones, emergency vehicle alarms, helicopters, gurgling liquefaction, burglar alarms beeping- altering you that the power is off and then planes flying over.
This image is of an Airforce Orion that was sweeping over the city within a couple of hours of the Feb 22 quake. It has a very distinitive sound generated by huge propelers, rumoured to be the second largest props on any aircraft.