![]() ![]() The described activities were carried out on Elba Island (central Italy), where karstified limestone set off the occurrence of nine sinkholes since 2008, all within less than 3000 m 2, causing major damage to an important road and many indirect losses. The latter is a highly precise instrument that is able to produce displacement maps with metric spatial resolution. In this paper an experience of sinkhole monitoring and early warning with GB-InSAR is described. Therefore sinkhole monitoring and associated early warnings constitute important research topics but, currently, only a few papers about sinkhole prediction can be found. However, they are often overlooked by people and administrators. Sinkholes represent a natural risk that may hit catastrophically without clearly detectible precursors. ![]()
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