Earth, Planets and SpaceOn May 11, 2024, an extreme G5-class geomagnetic storm triggered a spectacular and unusual display of colorful auroras in mid- to low-latitude regions all over the world.
Sota Nanjo, Kazuo Shiokawa
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Bursty magnetic reconnection at Saturn's magnetopause [PDF]
, 2013 We infer the evolution of magnetopause reconnection from simultaneous in situ magnetopause crossings and auroral observations by Cassini on 19 July 2008.
Masters, Adam +8 more
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Geophysical Monograph Series, Page 435-447., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Peter E. Marshall +2 more
wiley +2 more sources
A superposed epoch analysis of auroral evolution during substorm growth, onset and recovery : open magnetic flux control of substorm intensity [PDF]
, 2009 We perform two superposed epoch analyses of the auroral evolution during substorms using the FUV instrument on the Imager for Magnetopause-to-Aurora Global Explorer (IMAGE) spacecraft. The larger of the two studies includes nearly 2000 substorms.
Forsyth, C. +5 more
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Appearance and Precipitation Characteristics of High-Latitude Pulsating Aurora [PDF]
, 2022 Characteristics of pulsating aurora (PsA) at the equatorward part of the auroral oval have been well described in the literature by previous studies. We extend our knowledge on high-latitude PsA observations by analysing 68 PsA events from the optical ...
Fasil Tesema +2 more
core +3 more sources
High latitude artificial aurora from EISCAT: An unique phenomenon? [PDF]
, 2001 The EISCAT HF-facility is capable of transmitting up to 210MW of effective radiated power into the ionosphere around 4 MHz. Beam swinging experiments have been undertaken with O- and X-mode transmissions. During O-mode pumping soon after sunset, F-region
Rietveld, M. T. +3 more
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Simultaneous auroral observations described in the historical records of China, Japan and Korea from ancient times to AD 1700 [PDF]
Annales Geophysicae, 2000 Early auroral observations recorded in various oriental histories are examined in order to search for examples of strictly simultaneous and indisputably independent observations of the aurora borealis from spatially separated sites in East Asia.
D. M. Willis +4 more
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Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review
Sensors, 2020 High Frequency (HF) communications through ionospheric reflection is a widely used technique specifically for maritime, aeronautical, and emergency services communication with remote areas due to economic and management reasons, and also as backup system.
Marcos Hervás +2 more
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OH(6-2) spectra and rotational temperature measurements at Davis, Antarctica [PDF]
Annales Geophysicae, 1998 The OH(6-2) band was monitored during 1990 at Davis, Antarctica (68.6°S, 78.0°E) using a Czerny-Turner scanning spectrometer. Spectra obtained with a 0.15-nm bandwidth and wavelength steps of 0.005 nm have been recorded in an attempt to isolate ...
P. A. Greet +7 more
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Relationship between propagation direction of gravity waves in OH and OI airglow images and VHF radar echo occurrence during the SEEK-2 campaign [PDF]
Annales Geophysicae, 2005 We report simultaneous observations of atmospheric gravity waves (AGW) in OI (557.7nm) and OH airglow images and VHF radar backscatter from field-aligned irregularities (FAI) in the E-region during the SEEK-2 (Sporadic-E Experiment over Kyushu 2 ...
F. Onoma +7 more
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