According to NOAA's Space Weather Prediction Center (SWPC), the flare was an X-class event — the most powerful — and it unleashed a torrent of relativistic particles and X-rays that swept over Earth minutes later.Sun Unleashes Major Solar Flare at Earth (Video)
"Impacts to HF [high-frequency] radio communications on the daylight side of Earth are expected to last for more than an hour," researchers with the National Weather Service's Space Weather Prediction Center (SWPC) wrote in an online update today.Major, X-class solar flare erupts on sun, second in two days
In addition to Tuesday’s ejection, scientists noted another flare on Wednesday afternoon from the same active region (AR2158). This flare was classified as X1. The X-class solar flares are the strongest classification on the scale, and can produce strong to extreme radio blackouts on the daylight side of Earth when they occur. They are also known to produce long-lasting geomagnetic storming when the associated CME arrives.Solar storm heading for Earth
A "strong" solar flare that launched off the sun Wednesday afternoon could cause some fluctuations in Earth's power grid and slight disturbances in satellites and radio transmissions on Friday and Saturday.Also read:
Mother Tynnetta Muhammad's Warning to Prepare for Solar Eruptions.
Geomagnetic storm: Radiation hazards to humans - Wikipedia, the free encyclopedia
Radiation hazards to humansIntense solar flares release very-high-energy particles that can cause radiation poisoning to humans (and mammals in general) in the same way as low-energy radiation from nuclear blasts.
Earth's atmosphere and magnetosphere allow adequate protection at ground level, but astronauts in space are subject to potentially lethal doses of radiation. The penetration of high-energy particles into living cells can cause chromosome damage, cancer, and a host of other health problems. Large doses can be fatal immediately.
Solar protons with energies greater than 30 MeV are particularly hazardous. In October 1989, the Sun produced enough energetic particles that, if an astronaut were to have been standing on the Moon at the time, wearing only a space suit and caught out in the brunt of the storm, they would probably have died; the expected dose would be about 7000 rem. Note that astronauts who had time to gain safety in a shelter beneath moon soil would have absorbed only slight amounts of radiation.
Solar proton events can also produce elevated radiation aboard aircraft flying at high altitudes. Although these risks are small, monitoring of solar proton events by satellite instrumentation allows the occasional exposure to be monitored and evaluated, and eventually the flight paths and altitudes adjusted in order to lower the absorbed dose of the flight crews.