subsidence

He said continuing subsidence in the area now threatens to undermine recent repairs and investments including $83 million in state taxpayer funds.

Other issues including subsidence added to the insurers' total payouts.

Today though, it is still not clear how gradual the effect of subsidence was or why the decision was made to shore up the structure, Colin Morris, from the local history group, said.

This phenomenon of the Earth's surface literally being pushed down — technically known as land subsidence — is not limited to the tens of millions who will be impacted in China.

While they say in their comment article that consistently measuring subsidence is a great achievement, they argue it is only the start of finding solutions.