Results 61 to 70 of about 112,475 (200)
Solar Flare X‐Ray Impacts on Long Subionospheric VLF Paths
Space Weather, 2021 Solar flares increase the electron number concentration in the daytime ionosphere, potentially affecting radiowave propagation over several frequency ranges.
Samuel R. G. Belcher +6 more
doaj +1 more source
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source
Using the Maximum X-ray Flux Ratio and X-ray Background to Predict Solar Flare Class [PDF]
, 2015 We present the discovery of a relationship between the maximum ratio of the flare flux (namely, 0.5-4 Ang to the 1-8 Ang flux) and non-flare background (namely, the 1-8 Ang background flux), which clearly separates flares into classes by peak flux level.
arxiv +1 more source
Severe Distortion of the Apparent Resistivity Induced by the Super Geomagnetic Storm in May 2024
Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.Abstract The potential hazard of geomagnetically induced current (GIC) in metallic pipelines caused by space weather events is a widely discussed topic. On 10–11 May 2024, a super geomagnetic storm with Kp = 9 comparable to the Halloween event in 2003 occurred. The storm induced GIC caused severe distortion in apparent resistivity is a novel phenomenon.
Xin Zhang +4 more
wiley +1 more source
Fine structure events in microwave emission during solar minimum
Solar-Terrestrial Physics, 2019 The solar minimum is a period with a relatively smaller number of sunspots and solar eruptions, and has been less studied before. Since the radio signal rapidly responds to the change of solar plasma and magnetic field, we perform a comprehensive ...
Chengming Tan +6 more
doaj +1 more source
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract Recently, electron‐only reconnection, in which there is no obvious ion bulk flow and ion heating, has been pervasively observed in the Earth's magnetosphere. In this Letter, we realize electron‐only reconnection with a guide field in the Keda Linear Magnetized Plasma (KLMP) device.
Fa Yang +13 more
wiley +1 more source
Are complex magnetic field structures responsible for the confined X-class flares in super active region 12192? [PDF]
, 2017 From 2014 October 19 to 27, six X-class flares occurred in super active region (AR) 12192. They were all confined flares and were not followed by coronal mass ejections (CMEs). To examine the structures of the four flares close to the solar disk center from October 22 to 26, we employ firstly composite triple-time images in each flare process to ...
arxiv +1 more source
Sensitivity of Wintertime Arctic Black Carbon to Removal Processes and Regional Alaskan Sources
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 7, 16 April 2025.Abstract Air pollutants are primarily transported from midlatitude emission regions in winter and early spring, leading to elevated concentrations of aerosols, including black carbon (BC), in the Arctic, a phenomenon known as Arctic haze. The Weather Research and Forecasting model coupled with chemistry is used to investigate potential causes of ...
Eleftherios Ioannidis +16 more
wiley +1 more source
The relationships of solar flares with both sunspot and geomagnetic activity [PDF]
, 2011 The relationships between solar flare parameters (total importance, time duration, flare index, and flux) and sunspot activity (Rz) as well as those between geomagnetic activity (aa index) and the flare parameters can be well described by an integral response model with the response time scales of about eight and thirteen months, respectively. Compared
arxiv +1 more source
The Eddy Flux Transport of the Magnetohydrodynamic Quasi‐Geostrophic Disturbances
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract The classic Eliassen‐Palm (E‐P) flux in the geophysical fluid dynamics is a vector to qualify the eddy momentum and heat flux transport by Rossby waves in the latitude‐height plane. In this investigation, we derive two magnetic E‐P fluxes to quantify the eddy energy transport by magnetic Rossby waves by using magnetohydrodynamic quasi ...
Chengkang Li, Yaokun Li
wiley +1 more source