A
a a
Guest
EARTH JUST DODGED A LOT OF CMES: It seemed like sunspot AR3088 would never stop exploding. Over the past four days, the strangely-magnetized active region produced more than a dozen M-class solar flares:
Each X-ray peak in the graph above produced a corresponding shortwave radio blackout on Earth. No part of our planet was untouched.
More than half of the explosions also produced a coronal mass ejection (CME). Earth dodged them all. Only one and maybe two delivered glancing blows of no consequence. All the rest sailed harmlessly into space.
The simple reason why: AR3088 was never facing Earth. Most of the explosions occured while the sunspot was approaching or even rounding the sun\'s western limb.
This movie from NASA\'s Solar Dynamics Observatory is a good example. It shows a flare from AR3088 on Aug. 29th partially eclipsed by the edge of the sun. The explosion registered M9 on GOES satellite X-ray sensors, but the uneclipsed flare was probably much stronger--perhaps even an X-flare.
If the sunspot had been facing us, we might now be experiencing strong geomagnetic storms with spectacular low-latitude auroras. Maybe next time...
https://www.spaceweather.com/images2022/29aug22/almostx_strip.gif
https://www.spaceweather.com/
Each X-ray peak in the graph above produced a corresponding shortwave radio blackout on Earth. No part of our planet was untouched.
More than half of the explosions also produced a coronal mass ejection (CME). Earth dodged them all. Only one and maybe two delivered glancing blows of no consequence. All the rest sailed harmlessly into space.
The simple reason why: AR3088 was never facing Earth. Most of the explosions occured while the sunspot was approaching or even rounding the sun\'s western limb.
This movie from NASA\'s Solar Dynamics Observatory is a good example. It shows a flare from AR3088 on Aug. 29th partially eclipsed by the edge of the sun. The explosion registered M9 on GOES satellite X-ray sensors, but the uneclipsed flare was probably much stronger--perhaps even an X-flare.
If the sunspot had been facing us, we might now be experiencing strong geomagnetic storms with spectacular low-latitude auroras. Maybe next time...
https://www.spaceweather.com/images2022/29aug22/almostx_strip.gif
https://www.spaceweather.com/