Results 51 to 60 of about 109,561 (153)
Energy Deposition into the Ionosphere during a Solar Flare with Extreme-ultraviolet Late Phase
The Astrophysical Journal LettersSolar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap for ...
Jing Liu +8 more
doaj +1 more source
Statistical analysis of short-wave fadeout for extreme space weather event estimation
Earth, Planets and Space, 2020 Solar flares trigger an increase in plasma density in the ionosphere including the D region, and cause the absorption of radio waves, especially in high-frequency (HF) ranges, called short-wave fadeout (SWF).
Chihiro Tao +7 more
doaj +1 more source
Risk Analysis, EarlyView.Abstract There are two separate conceptualizations for assessing existential risks: Planetary Boundaries (PBs) and global catastrophic risks (GCRs). While these concepts are similar in principle, their underpinning literatures tend not to engage with each other.
Eoin McLaughlin, Matthias Beck
wiley +1 more source
Embracing the politics of transformation: Policy action as “battle‐settlement events”
Review of Policy Research, EarlyView.Abstract Societal transformations for addressing climate change are intensely contested and at risk of resistance and backlash to ambitious policy action. But they are frequently modeled through heuristics such as S‐curves which abstract from such conflicts, assuming increasing returns to scale as a driver of transformations.
James Patterson, Matthew Paterson
wiley +1 more source
Response of the Thermosphere‐Ionosphere System to an X‐Class Solar Flare: 30 March 2022 Case Study
Space WeatherThe response of the thermosphere ionosphere system to an X1.3 class solar flare is studied using observations of the total electron content (TEC) and the Global Ionosphere Thermosphere Model (GITM) simulations.
Volkan Sarp, Erdal Yiğit, Ali Kilcik
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
Space WeatherSolar flares are bursts of electromagnetic radiation originating in the Sun's atmosphere. Solar flares cause a rapid increase in ionization in the ionosphere, resulting in radio signal interference.
A. Mahmoudian +2 more
doaj +1 more source
Frontiers in Astronomy and Space SciencesThe effects of solar flares in the D-region ionosphere at two high-latitude stations: Maitri (70.75°S, 11.75°E) and Abisko (68.4°N, 18.9°E), located in different hemispheres are studied. We analyzed 37 M-class flares and 6 X-class flares of the year 2014,
Shipra Sinha +3 more
doaj +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