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A solar flare is a relatively intense, localized emission of electromagnetic radiation in the Sun's atmosphere. Flares occur in active regions and are often, but not always, accompanied by coronal mass ejections, solar particle events, and other eruptive solar phenomena. The occurrence of solar flares varies with the 11-year solar cycle.
Post-eruptive loops in the wake of a solar flare, image taken by the TRACE satellite (photo by NASA). In solar physics, a solar particle event (SPE), also known as a solar energetic particle event or solar radiation storm, [a] [1] is a solar phenomenon which occurs when particles emitted by the Sun, mostly protons, become accelerated either in the Sun's atmosphere during a solar flare or in ...
Solar flares are intense, localized bursts of electromagnetic radiation from the sun, releasing immense energy over short periods. These events impact Earth's upper atmosphere and can occasionally ...
They are broad-band continuum emissions associated either with solar flares or Type I bursts. [16] Flare-associated Type IV bursts are also called flare continuum bursts, and they typically begin at or shortly after a flare's impulsive phase. Larger flares often include a storm continuum phase that follows after the flare continuum. [89]
The Sun has unleashed a powerful solar flare, Nasa has said. The flare, designated X2.3, belongs to the most intense X class of flares. It was spotted by Nasa’s Solar Dynamics Observatory, which ...
It's the biggest flare of this 11-year solar cycle, which is approaching its peak, according to NOAA. ... the seven astronauts were advised to stay in areas with strong radiation shielding. The ...
The frequency of ejections depends on the phase of the solar cycle: from about 0.2 per day near the solar minimum to 3.5 per day near the solar maximum. [37] However, the peak CME occurrence rate is often 6–12 months after sunspot number reaches its maximum.
Radio disruption occurred across North and South America.