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According to the NOAA Space Weather scale[0], we get about 15 of these R3-severity events every year. Is this one notable in some way? [0] https://www.swpc.noa

According to the NOAA Space Weather scale[0], we get about 15 of these R3-severity events every year. Is this one notable in some way? [0] https://www.swpc.noaa.gov/noaa-scales-explanation https://www.swpc.noaa.gov/noaa-scales-explanation

alexfromapex 4y ago
I think it's just bringing attention to the sunspot and its effects, more info from spaceweather.com: "NOAA forecasters have boosted the odds of an X-flare today to 30%. Earth-facing sunspot AR3182 has developed an unstable 'beta-gamma-delta' magnetic field that poses a threat for strong explosions. Shortwave radio blackouts and Earth-directed CMEs are likely this week"
simne 4y ago
It affects ionosphere, which is relatively low frequency by definition, most time under 50MHz. In past, where lot of use of under 50MHz bands (most known now shortwave band), because of technology limitations. Now, most critical usages are over 88-100MHz. Even more, every smartphone/tablet and display, emit noise in under 50MHz band. Under 1MHz is just sacrificed to cheap electronics, using dc-dc converters, even properly designed/shielded, emit noise (and many examples are not properly designed/shielded). Only amateurs and radio-astronomers still using shortwave band extensively. And they usually notice events, but nobody cares much. Few years ago, I've hear about using shortwave for underground communication and geo-radar, but they by definition mostly underground and very high power, just don't see ionosphere disturbances. Also one of cause of modern mostly line of sight communication usage - question of sharing frequencies. - Short-wave are hard to share, because You could hear some guy at other side of Earth. LoS is by definition near invisible on other side, because of surface curvature. To be strict, many objects reflecting waves - clouds, traces of planes, etc, but they are not very powerful.
simne 4y ago
Some people feel headaches when Earth ionosphere disturbances happen, but I have not hear good scientific explanation. Most relevant I know, modern research found in mammals sensitivity to magnetic fields, so it is possible, it exists as rudiment in human, so not all sensitive.

alexfromapex 4y ago

I think it's just bringing attention to the sunspot and its effects, more info from spaceweather.com: "NOAA forecasters have boosted the odds of an X-flare today to 30%. Earth-facing sunspot AR3182 has developed an unstable 'beta-gamma-delta' magnetic field that poses a threat for strong explosions. Shortwave radio blackouts and Earth-directed CMEs are likely this week"

simne 4y ago

It affects ionosphere, which is relatively low frequency by definition, most time under 50MHz. In past, where lot of use of under 50MHz bands (most known now shortwave band), because of technology limitations. Now, most critical usages are over 88-100MHz. Even more, every smartphone/tablet and display, emit noise in under 50MHz band. Under 1MHz is just sacrificed to cheap electronics, using dc-dc converters, even properly designed/shielded, emit noise (and many examples are not properly designed/shielded). Only amateurs and radio-astronomers still using shortwave band extensively. And they usually notice events, but nobody cares much. Few years ago, I've hear about using shortwave for underground communication and geo-radar, but they by definition mostly underground and very high power, just don't see ionosphere disturbances. Also one of cause of modern mostly line of sight communication usage - question of sharing frequencies. - Short-wave are hard to share, because You could hear some guy at other side of Earth. LoS is by definition near invisible on other side, because of surface curvature. To be strict, many objects reflecting waves - clouds, traces of planes, etc, but they are not very powerful.

simne 4y ago

Some people feel headaches when Earth ionosphere disturbances happen, but I have not hear good scientific explanation. Most relevant I know, modern research found in mammals sensitivity to magnetic fields, so it is possible, it exists as rudiment in human, so not all sensitive.