Fibre-​optic cables are emerging as a valuable tool for geoscientists and glaciologists. They offer a relatively inexpensive way of measuring even the tiniest glacial earthquakes – plus they can also be used to obtain more accurate images of the geological subsurface in earthquake-​prone megacities. (ETH Zürich / Peter Rüegg)

Read the full article here:

https://ethz.ch/en/news-and-events/eth-news/news/2020/09/thousands-of-seismometers-on-a-single-cable.html