Results 31 to 40 of about 523,058 (203)

On the frequency of auroras over Germany

open access: yesGeofísica Internacional, 2011
Se muestra una recopilación de 171 observaciones de auroras alemanas entre 1946 y 1964, las cuales no se habían publicado previamente. Los datos se analizaron en relación con el índice Kp, el número de manchas solares y las variaciones estacionales ...
Wilfried Schröder
doaj   +1 more source

A watercolor painting of northern lights seen above Japan on 11 February 1958

open access: yesJournal of Space Weather and Space Climate, 2019
A 61 years old watercolor painting of red aurora was recently provided from a Japanese citizen, and it contributed to understand the detailed time evolution around the peak time of the large magnetic storm on 11 February 1958.
Kataoka Ryuho, Kazama Shigeru
doaj   +1 more source

Aurora Image Classification with Deep Metric Learning

open access: yesSensors, 2022
In recent years, neural networks have been increasingly used for classifying aurora images. In particular, convolutional neural networks have been actively studied.
Takeru Endo, Mitsuharu Matsumoto
doaj   +1 more source

The Northern Lights [PDF]

open access: yes
This activity requires students to plot the location and boundaries of a typical auroral oval in the Arctic region. They will see its geographic extent and determine its relationship to familiar continents and countries.

core   +1 more source

X-Ray Emission from Jupiter, Saturn, and Earth: A Short Review [PDF]

open access: yes, 2006
Jupiter, Saturn, and Earth - the three planets having dense atmosphere and a well developed magnetosphere - are known to emit X-rays. Recently, Chandra X-ray Observatory has observed X-rays from these planets, and XMM-Newton has observed them from ...
Bhardwaj, Anil
core   +2 more sources

UVS Observations of Ganymede's Aurora During Juno Orbits 34 and 35

open access: yesGeophysical Research Letters, 2022
On 7 June 2021, Juno‐UVS mapped Ganymede's auroral emissions near a closest approach altitude of 1,046 km. The high spatial resolution map exhibits bright, 200–1,000 R, oxygen emissions organized into northern and southern auroral ovals.
T. K. Greathouse   +14 more
doaj   +1 more source

where angels fear to tread : Tracing the Journey of the Female Poet in Aurora Leigh [PDF]

open access: yes, 2012
Through Aurora Leigh, Elizabeth Barrett Browning explores the role of female poets as agents of social change in the Victorian society. During the Victorian period, the role of women was largely confined to the domestic setting.
Lam, Dorcas Y
core   +1 more source

Agile collaboration: Citizen science as a transdisciplinary approach to heliophysics

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Citizen science connects scientists with the public to enable discovery, engaging broad audiences across the world. There are many attributes that make citizen science an asset to the field of heliophysics, including agile collaboration.
Vincent Ledvina   +33 more
doaj   +1 more source

Combined EISCAT radar and optical multispectral and tomographic observations of black aurora [PDF]

open access: yes, 2008
Black auroras are recognized as spatially well-defined regions within a uniform diffuse auroral background where the optical emission is significantly reduced.
Blixt, E. M.   +5 more
core   +1 more source

pyGPI5: A python D- and E-region chemistry and ionization model

open access: yesFrontiers in Astronomy and Space Sciences, 2022
We present a Python implementation of a D- and E-region chemistry and ionization code called pyGPI5. Particle precipitation that penetrates into the E- and D-region of the ionosphere-thermosphere causes significant enhancements of the electron density ...
Stephen R. Kaeppler   +5 more
doaj   +1 more source

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