Imaggeo on Mondays

Imaggeo on Mondays: The colourful sinkhole clusters at Ghor Al-Haditha

Rob Watson September 30, 2019

Crazy colours in a cluster of sinkholes at Ghor Al-Haditha. Credit: Rob Watson (distributed via imaggeo.egu.eu)

Sinkholes that form on the Dead Sea shore at Ghor Al-Haditha, Jordan, often occur in clusters, with many holes packed into a small area. However the visual appearance of neighbouring sinkholes can vary significantly. Mineral precipitation in the foremost sinkhole in this picture, which has no fresh water supply, gives it a garish pink-orange colouration. The larger hole behind has a groundwater-de ...[Read More]

Imaggeo on Mondays: The polje between sky and Earth

Cyril Mayaud September 23, 2019

The polje between sky and earth. Credit: Cyril Mayaud (distributed via imaggeo.egu.eu).

Poljes are one of the most impressive features existing in karst landscapes. These large flat closed depressions are prone to regular flooding that can form temporary lakes on their surface. Planinsko Polje [in Slovenia] is surely the most famous example of polje existing. The highest floods can reach up to 8 metres above the gauging station and last for more than two months. The lake is then more ...[Read More]

Imaggeo on Mondays: How do Earth’s Northern Lights form?

Konstantina Nakoudi September 16, 2019

Aurora Borealis in Ny Ålesund, Svalbard. Credit: Konstantina Nakoudi (distributed via imaggeo.egu.eu)

Aurora Borealis, which means Northern Lights are caused by electrically charged particles from the sun, which enter the Earth’s atmosphere and collide with gases such as oxygen and nitrogen. When the charged particles are blown towards the Earth by the solar wind, they are largely deflected by the Earth’s magnetic field. However, the Earth’s magnetic field is weaker at the poles and therefore some ...[Read More]

Imaggeo on Mondays: A lifeline between light and shadow

Florian Konrad September 9, 2019

A Lifeline Between Light and Shadow. Credit: Florian Konrad (distributed via imaggeo.egu.eu)

The Rapaälven making its way through the Rapadalen valley in Northern Sweden. After over a week of hiking through pure wilderness I reached the summit of Skierffe together with three friends. We were just blown away by the view and completely in awe for the beautiful shape of the rivers course… little lakes in between river channels of different sizes as well as dense vegetation forming a ha ...[Read More]