GeoLog

Imaggeo

Imaggeo on Mondays: A total eclipse of the Moon

Imaggeo on Mondays: A total eclipse of the Moon

Today, all eyes are turned to the sky; at least in North America, where the region will be treated to an eclipse of the sun. The online hype is hard to miss and its hardly surprising, opportunities to see the moon completely cover the Sun, where you are, are rare*. According to NASA, the same spot on Earth only gets to see a solar eclipse for a few minutes about every 375 years!

If like us, you can’t be in North America to see the phenomenon, don’t worry, you can follow all the action on NASA’s live stream. Keep an on eye on social media channels too. Following the #Eclipse2017 and #Eclipse hashtags throughout the evening will no doubt allow you to see stunning photographs and video!

Instead of highlighting an image of a past solar eclipse, we thought we’d turn our attention to a total lunar eclipse instead.

The phenomenon is rarer than total solar eclipses and occurs when the Moon passes directly behind the Earth, so that the Earth cast’s a shadow over the Moon. Lunar eclipses happen only when the Sun, Earth and Moon are perfectly aligned.

Often during a lunar eclipse, the Moon will have a red/orange hue, as in today’s featured image. This happens because the Earth’s atmosphere absorbs some colours, as it bends sunlight towards the Moon.

Unlike solar eclipses, which are rather limited in their geographical extent, lunar eclipses are visible to all those on the dark side of the Earth (so all those experiencing night time), meaning half of planet Earth will see a lunar eclipse at any one time.

The next total Lunar eclipse will take place on 31st  January2018 and will be visible (at least to some extent) in North/East Europe, Asia, Australia, North/East Africa, North America, North/West South America, Pacific, Atlantic, Indian Ocean, Arctic, Antarctica. The other half of the globe will have to wait until 27th/28th July (2018) to catch a glimpse of a lunar eclipse.

*Editor’s Note: Contrary to popular belief, solar eclipses aren’t so rare. A total solar eclipse happens, on average, once every 18 months. What isn’t so common is it happening in a place near you. The science behind that is clearly explained in a recent post on Space.com.

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

 

Imaggeo on Mondays: The wonderful home of pink flamingos

Imaggeo on Mondays: The wonderful home of pink flamingos

This stunning photograph is another of the fabulous finalists of the 2017 imaggeo photo contest. Imaggeo is the EGU’s open access image repository. It’s a great place to showcase your photographs; so whether you are stuck in the lab this summer, frantically typing away at a paper, or are lucky enough to be in the field, be sure to submit your photographs for all EGU members to see. You never know, we might choose to feature it on the blog too!

Surrounded by sleeping and active volcanoes, Laguna Colorada is one of the mythical places of South-Lipez. Perched at more than 4000 meters on the Bolivian altiplano , this volcanic laguna owes its color to microscopic red bacteria which make the delight of pink flamingos.

By Florent Hodel, Université Paul Sabatier, Toulouse, France

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

Imaggeo on Mondays: A dramatic avalanche from Annapurna South

Imaggeo on Mondays: A dramatic avalanche from Annapurna South

The Annapurna massif is located in an imposing 55 km long collection of peaks in the Himalayas, which behave as a single structural block. Composed of one peak (Annapurna I Main) in excess of 8000 m, a further thirteen peaks over 7000 m and sixteen more of over 6000 m, the massif forms a striking structure within the Himalayas. Annapurna South (pictured in today’s featured image), the 101st tallest peak in the world, towers 7219 m above sea level.

Glaciers in High Mountain Asia, a region that includes the Himalayas, contain the largest volume of ice outside the polar regions. The water trapped, as ice, in the glaciers of the Himalayas is an important source of drinking water, water for irrigation and water for hydropower generation throughout the region. As the Earth’s climate changes and negatively affects glaciers world-wide, scientists are working hard to understand what increased glacier melting means for the communities which depend on them.

Emily Hill is one such scientist. Her and a team of colleagues spent 2 weeks at Annapurna Base Camp in Nepal conducting measurements on the debris covered South Annapurna Glacier.

“We frequently heard avalanches but often they were over too quick to capture on camera. Fortunately, this was one of the largest and the camera was at the ready. These avalanches are an important source of mass for the glacier below,” reminisces Emily.

Glaciers accumulate ice throughout the winter months, as snow adds to the glacial column during the cold months. In addition, avalanches deliver additional snow throughout the year.

“I’m not too sure of the scale of the avalanche, it could probably have been a couple of 100 m across. The avalanche occurred early afternoon when the solar radiation was highest and increased melt is likely to have caused the failure,” describes Emily.

Avalanches in the region are not only an important source of mass accumulation for many of the glaciers, they also pose a hazard not only to climbers of these mountains but also further down along the tourist trail up to Annapurna Base Camp, where there is an avalanche risk section of the route.

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

Imaggeo on Mondays: Symbiosis of ice and water

Imaggeo on Mondays: Symbiosis of ice and water

This mesmerising photograph is another of the fabulous finalists (and winner) of the 2017 imaggeo photo contest. Imaggeo is the EGU’s open access image repository. It’s a great place to showcase your photographs; so whether you are stuck in the lab this summer, frantically typing away at a paper, or are lucky enough to be in the field, be sure to submit your photographs for all EGU members to see. You never know, we might choose to feature it on the blog too!

This picture was taken at Storforsen, an impressive rapid in the Pite River in northern Sweden. That day, the sinking sun illuminated the whole area with warm reddish colors which formed a contrast to the remains of the long-lasting winter period. The rapid is located close to the site of a temporary seismological recording station which is part of the international ScanArray project. Within that project we focus on mapping the crustal and mantle structure below Scandinavia using a dense temporary deployment of broadband seismometers.

By Michael Grund, Karlsruher Institut für Technologie (KIT)

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

 

Follow

Get every new post on this blog delivered to your Inbox.

Join other followers: