# gst: how to detect a sinkhole

<< It comes as quite a shock when the ground beneath your feet, your house or your field suddenly disappears leaving a hole. [..] We call these sinkholes, and they are a global problem. >>

<< These voids may eventually come to the surface over time as the roof progressively collapses. These collapses can be gradual, or can happen suddenly, with surface depressions appearing overnight without warning. >>

Peter Styles, Jamie Pringle. How to detect a sinkhole - before it swallows you up. Keele University. Sep 4, 2018.

https://theconversation.com/how-to-detect-a-sinkhole-before-it-swallows-you-up-101543