ERT at sunset
ERT measurement on the beach at sunset

Links
- https://www.ifgeo.uni-bonn.de/en/sections/geophysics/news/geophysikalische-messungen-auf-der-nordseeinsel-spiekeroog/spieker2.jpg/image_view_fullscreen
- https://www.ifgeo.uni-bonn.de/en/sections/geophysics/news/geophysikalische-messungen-auf-der-nordseeinsel-spiekeroog/spieker2.jpg/@@download/image/spieker2.jpg