Jan 27, 2024
A keogram ("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display. Captured at Midnight Dome, Dawson City.
seen from China
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seen from United States
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seen from Argentina
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A keogram ("keo" from "Keoeeit" – Inuit word for "Aurora Borealis") is a way of displaying the intensity of an auroral display. Captured at Midnight Dome, Dawson City.
From Earth Science Picture of the Day; April 29, 2018:
Archive - Keogram of Mt. Snezka Photographer: Tomas Trzicky, Lukas Ronge; Summary Author: Tomas Trzicky
Each Sunday we present a notable item from our archives. This EPOD was originally published April 30, 2012.
The image above featuring Mt. Snezka in the Czech Republic was created from 1,440 narrow, vertical strips of consecutive photographs. This is referred to as a keogram. Keograms were originally used for displaying auroras from a sequence of fisheye photos. The photo strips displayed here were taken once per minute between 00:00 and 24:00 on March 7, 2012, just one day before the full Moon. Each frame is represented by a narrow vertical strip, which progresses in time from left to right with each consecutive image. So the final image is a horizontal representation of time.
From this late winter image, taken a few days shy of the vernal equinox, it's evident that the duration of night and day was almost equal. The day dawned clear and bright and blue sky dominated the morning hours, but during the afternoon scattered clouds started to form. Night scenes are moonlit. The two apparent divisions of day and night are caused by switching between manual exposure (nighttime) and automatic exposure (daytime). In the center foreground, people at work are displayed as short dark lines. The camera is facing east, looking toward Mt. Snezka, the highest peak in the Czech Republic at 5,256 ft (1,602 m).
Lucni Bouda, Czech Republic Coordinates: 50.7345, 15.6976
Related Links
Anvil Cloud Over Czech Republic
24 hour time-lapse keogram showing another view
Tomas' Website
Lucas' Website
Student Links
Seasons of the Year
Earth Observatory
Northeastern Europe
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