GeoLog

Space and Planetary Sciences

Imaggeo On Monday: Space plasma in a jar

February 1, 2021
Imaggeo On Monday: Space plasma in a jar
Space plasma in a jar . Credit: Gabriel Voitcu (distributed via imaggeo.egu.eu)

Laboratory visualisation of solar wind interaction with Earth’s magnetic field. The Van Allen radiation belt, Earth’s magnetosphere, “bow shock” and a solar coronal hole can all be seen, and are emphasized with the ‘Planeterrella experiment‘, a vacuum chamber in the shape of a bell jar with the ‘Sun’ on the left (in the form of a large metallic sphere) and the ‘Earth& ...[Read More]

Winners of the EGU Best Blog Posts of 2019 Competition

January 17, 2020
Winners of the EGU Best Blog Posts of 2019 Competition
Image modified from Lava glow and space at the Kilauea volcano. Credit: Andreas Johnsson (distributed via imaggeo.egu.eu).

2019 was a brilliant year for our blogging network here at EGU. Across the EGU’s official blog, GeoLog, as well as the network and division blogs there were so many interesting, educational and just downright entertaining posts this year it was hard to get the blog editors to choose their favourites! Nevertheless in December, to celebrate the excellent display of science writing across the network ...[Read More]

Conversations on a century of geoscience in Europe: Part 2

October 11, 2019
Conversations on a century of geoscience in Europe: Part 2
Image modified from Ice breaker. Credit: Jan-Marcus Nasse (distributed via imaggeo.egu.eu)

When you think about the last century of geoscience, what comes to mind? Perhaps Alfred Wegener’s theory of continental drift? Or Inge Lehmann’s discovery of Earth’s solid inner core? Over the last 100 years, geoscientists have made incredible contributions to our understanding of the Earth, the solar system, and beyond. The science community has explored uncharted territory, challenged previously ...[Read More]

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

September 16, 2019
Imaggeo on Mondays: How do Earth’s Northern Lights form?
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]