(ORDO NEWS) — Active sunspot AR2975 flared up again on March 30, producing the strongest flare, an X1.3-class explosion. NASA’s Solar Dynamics Observatory detected an extreme ultraviolet flare.
The radiation from the flare ionized the Earth’s upper atmosphere, causing shortwave radio blackouts over the Americas.
Here is the shutdown map. Aviators, sailors and radio operators may have noticed unusual propagation effects at frequencies below 30 MHz.
The CME almost certainly emerges from the explosion site. SOHO coronagraphs have yet to detect the cloud, but there is strong circumstantial evidence.
For example, the US Air Force detected a Type II solar radio burst, a type of natural radio signal generated by CME shock waves.
In addition, NASA’s Solar Dynamics Observatory took a picture of a solar tsunami that appears to have been generated by an explosion emerging from the solar atmosphere.
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