Results 1 to 10 of about 355 (166)

The first mitochondrial genome of spongillafly from Asia (Neuroptera: Sisyridae: Sisyra aurorae Navás, 1933) and phylogenetic implications of Osmyloidea [PDF]

open access: yesMitochondrial DNA. Part B. Resources, 2021
The spongillafly species Sisyra aurorae Navás, 1933 (Neuroptera: Sisyridae) is an endemic species in China and is first recorded from Shanghai. The mitogenome of this species is sequenced, representing the first mitogenome of Sisyridae from Asia.
Xiumei Lu   +3 more
doaj   +2 more sources

Evidence for Alfvén waves powering auroral arc via a static electric potential drop [PDF]

open access: yesNature Communications
Natural light displays known as the aurora provide a captivating glimpse into the electromagnetic dynamics in space plasmas. Aurorae are not exclusive to Earth but also observed on celestial bodies including planets and even comets. Previous studies have
S. Tian   +10 more
doaj   +2 more sources

Penetration of MeV electrons into the mesosphere accompanying pulsating aurorae [PDF]

open access: yesScientific Reports, 2021
Pulsating aurorae (PsA) are caused by the intermittent precipitations of magnetospheric electrons (energies of a few keV to a few tens of keV) through wave-particle interactions, thereby depositing most of their energy at altitudes ~ 100 km. However, the
Y. Miyoshi   +26 more
doaj   +2 more sources

First record of a male-male aggressive interaction in the golden Alpine salamander Salamandra atra aurorae (Caudata, Salamandridae) [PDF]

open access: yesHerpetozoa, 2023
The golden Alpine salamander Salamandra atra aurorae Trevisan, 1982 is an endemic subspecies found in Sette Comuni and Vezzena plateau in Veneto, Italy.
Milos Di Gregorio   +2 more
doaj   +3 more sources

Great “Space Weather Events” in March 1653 and September 1672 Were Not Supported With Simultaneous/Clustering Auroral Observations During the Maunder Minimum

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The solar activity has been significantly weakened during the Maunder Minimum (MM: 1645–1715), whereas it has been somewhat controversial to reconstruct the actual solar-activity magnitude and the space weather activity in this interval.
Kentaro Hattori   +4 more
doaj   +1 more source

What the Upper Atmospheres of Giant Planets Reveal

open access: yesRemote Sensing, 2022
The upper atmospheres of the Giant Planets, Jupiter, Saturn, Uranus and Neptune are transition regions between meteorological layers and outer space. As a result of their exceptionally rarefied nature, they are highly sensitive and therefore revealing ...
James O’Donoghue, Tom Stallard
doaj   +1 more source

A review for Japanese auroral records on the three extreme space weather events around the International Geophysical Year (1957–1958)

open access: yesGeoscience Data Journal, 2023
Solar Cycle 19 was probably the greatest solar cycle over the last four centuries and significantly disrupted the solar‐terrestrial environments with a number of solar eruptions and resultant geomagnetic storms. At its peak, the International Geophysical
Hisashi Hayakawa   +2 more
doaj   +1 more source

A possible case of sporadic aurora observed at Rio de Janeiro

open access: yesEarth, Planets and Space, 2020
Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar–terrestrial environments.
Denny M. Oliveira   +4 more
doaj   +1 more source

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

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