Are the earth quakes in the last days are related? Yes! They all have one thing in common the Australian plate. Things will get worse in the future why? Well the amount of coal iron ore and now natural gas being taken from Australia since this country began mining and the weight of all exports must have an effect on the balance of the planet. If you don't believe me go out and take a wheel weight from one of your car wheels and see what happens. The natural gas is like a shock absorber, try taking one of those off your car as well...We move people from on area of Sydney in the morning and then back in the afternoon, there is thousands of tons doing this every day, not only here but in all other cities all around the world. This would weaken the sub surface rocks and in time will cause cracking and therefore weight changes in a local area and then this will transfer to the plates as a hole. What can be done ? Nothing it will just happen and we will have to live with the consequences.This doesn't take into account all the atomic bomb explosions in the Pacific and other places over the years as well..Don't believe me ? Then go to Newcastle (Australia) and see the ground subsidence there that has come to the surface..
I guess that some people will think I'm a real nutter now but I posted this as food for thought only..cheers Stewart