Subsurface meteorolgy

With a total lenght of about 2 km, the Surdsellir lava cave is part of the Hallmundarhraun lava field in western Iceland. The caves ceiling is partly broken in, forming entrances and windows towards the earths surface. On this day of typically icelandic weather, meteorological conditions changed quickly between sun, clouds, rain and wind. While walking through the cave during a rain shower, the sun came out illuminating the raindrops falling into the cave.