对树木年轮物质的光谱分析表明，碳-14浓度在一年内急剧上升，这与发生在公元前5410年左右的极端太阳高能粒子事件相一致。
solar activity
Posted inResearch Spotlights
Tree Rings Show Record of Newly Identified Extreme Solar Activity Event
Mass spectroscopy of tree ring material indicates a sharp, single-year rise in carbon-14 concentrations consistent with an extreme solar energetic particle event that occurred around 5410 BCE.
Posted inNews
When Betelgeuse Won’t Explode, You Need a Big Telescope to Prove It
Thanks to last-minute telescope time, researchers pieced together the sequence of events that caused Betelgeuse’s Great Dimming last year.
Posted inNews
Record-Setting Flare Spotted on the Nearest Star to the Sun
Proxima Centauri recently let loose a blast of radiation, and ground- and space-based telescopes detected the record-setting event at wavelengths ranging from radio to the ultraviolet.
Posted inEditors' Highlights
Severe Radiation Storms Pose Health Risk to Air Travel
Simulations of radiation storm fluxes on real flight paths highlight how severe space weather could expose aircrew and passengers on busy transatlantic routes to significant radiation doses.
Posted inFeatures
Ham Radio Forms a Planet-Sized Space Weather Sensor Network
For researchers who monitor the effects of solar activity on Earth’s atmosphere, telecommunications, and electrical utilities, amateur radio signals a golden age of crowdsourced science.
Posted inResearch Spotlights
The “Complicated” Complexity of Solar Storms
Researchers turned to crowdsourced science to identify patterns in coronal mass ejections.
Posted inNews
Scientists Claim a More Accurate Method of Predicting Solar Flares
Supercomputer 3D modeling of magnetic fields could help mitigate damage from geomagnetic storms.
Posted inEditors' Highlights
The Importance of Solar Lyman-alpha Emissions for Space Weather
Lyman-alpha emissions convey a major part of the solar-flare photon energy reaching Earth and play a significant role in flare-driven enhancements of ionospheric conductivity.
Posted inEditors' Highlights
Ensemble Modeling of Coronal Mass Ejection Arrival at 1 AU
Heliospheric imaging data can be used in ensemble modeling of CME arrival time at Earth to improve space weather forecasts, treating the solar wind as a 1-D incompressible hydrodynamic flow.