The region of the Earth’s atmosphere lying at altitudes between about 80 and 120 km, corresponding to the mesosphere–lower thermosphere–ionosphere (MLTI), is often referred to as the “ignorosphere”, because its observation is so challenging that only a handful of measurements of its composition, temperature and other physical parameters have been obtained over the last few decades. It is, however, ...[Read More]
New auroral dunes discovered through citizen science
Two simultaneous pictures of the dunes on 7 October 2018 from (a) Laitila (by Pirjo Koski) and (b) Ruovesi (by Rami Valonen), where six fingertips were identified to determine their altitude. © Palmroth et al. (2020) / CC BY 4.0