Results 11 to 20 of about 438 (257)

The far-ultraviolet main auroral emission at Jupiter – Part 1: Dawn–dusk brightness asymmetries [PDF]

open access: yesAnnales Geophysicae, 2015
The main auroral emission at Jupiter generally appears as a quasi-closed curtain centered around the magnetic pole. This auroral feature, which accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range, is ...
B. Bonfond   +10 more
doaj   +1 more source

The presence of large sunspots near the central solar meridian at the times of major geomagnetic storms [PDF]

open access: yesAnnales Geophysicae, 2009
A further study is made of the validity of a technique developed by the authors to identify historical occurrences of intense geomagnetic storms, which is based on finding approximately coincident observations of sunspots and aurorae recorded in East ...
D. M. Willis   +3 more
doaj   +1 more source

Sporadic aurorae observed in East Asia [PDF]

open access: yesAnnales Geophysicae, 2007
All the accessible auroral observations recorded in Chinese and Japanese histories during the interval AD 1840–1911 are investigated in detail. Most of these auroral records have never been translated into a Western language before.
D. M. Willis   +3 more
doaj   +1 more source

Io’s Optical Aurorae in Jupiter’s Shadow

open access: yesThe Planetary Science Journal, 2023
Decline and recovery timescales surrounding eclipse are indicative of the controlling physical processes in Io’s atmosphere. Recent studies have established that the majority of Io’s molecular atmosphere, SO _2 and SO, condenses during its passage ...
Carl Schmidt   +15 more
doaj   +1 more source

The Optical Aurorae of Europa, Ganymede, and Callisto

open access: yesThe Planetary Science Journal, 2023
The tenuous atmospheres of the Galilean satellites are sourced from their surfaces and produced by a combination of plasma-surface interactions and thermal processes. Even though they are thin, these atmospheres can be studied via their auroral emissions,
Katherine de Kleer   +4 more
doaj   +1 more source

Letter to the Editor
Two early observations of aurora at low latitudes
[PDF]

open access: yesAnnales Geophysicae, 2001
It is the purpose of this paper to present evidence concerning the observation of aurorae in the years 880 AD and 942 AD recorded by Arabs from the Iberian Peninsula and the north of Africa.Key words. Meteorology and atmospheric dynamics (general
J. M. Vaquero, M. C. Gallego
doaj   +1 more source

AURORA D2.2 AURORA App

open access: yes, 2023
This deliverable describes the development process and initial release version of the AURORA app, which will be used by citizens to track their energy behaviour. It is already available on TestFlight (Apple) and will be released to the Appstore after key discussions about some features have been concluded within the consortium (Section 1).
Lorenz, Lars, Gerber, Alexander
openaire   +1 more source

Some early descriptions of aurorae in China [PDF]

open access: yesAnnales Geophysicae, 1995
Eight accounts from ancient Chinese literature have been found that describe phenomena in contexts and in metaphors that are distinctly auroral. These accounts relate to personages purported to have lived in the third millennium B.C.
P. K. Wang, G. L. Siscoe
doaj   +1 more source

Auroras on Planets around Pulsars

open access: yesThe Astrophysical Journal Letters, 2023
The first extrasolar planets were discovered serendipitously, by finding the slight variation in otherwise highly regular timing of the pulses, caused by the planets orbiting a millisecond pulsar.
Ruchi Mishra   +3 more
doaj   +1 more source

The far-ultraviolet main auroral emission at Jupiter – Part 2: Vertical emission profile [PDF]

open access: yesAnnales Geophysicae, 2015
The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as it accounts for approximately half of the total ...
B. Bonfond   +10 more
doaj   +1 more source

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