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A "severe" solar storm could make the northern lights visible in the U.S. farther south than usual while also posing the potential to disrupt modern technology, according to the National Oceanic ...
Programming note: Tune in to CNN NewsNight: Solar Storm, hosted by Abby Phillip and Bill Weir, tonight from 10 p.m. to 12 a.m. ET. For the latest on the massive solar storm, head over to CNN’s ...
While most of this week’s disturbances are expected to have little to no impact, there is a chance that the expected storm could reach a level of 3 out of 5 on the geomagnetic storm severity scale.
A geomagnetic storm is defined [5] by changes in the Dst [6] (disturbance – storm time) index. The Dst index estimates the globally averaged change of the horizontal component of the Earth's magnetic field at the magnetic equator based on measurements from a few magnetometer stations.
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 ...
Reports initially predicted that the CME could graze Earth, [40] however geomagnetic storms on 30–31 October only reached a moderate K p index of 4. [41] On 3 and 4 November, the K p index reached 8−, equivalent to a G4 geomagnetic storm. [42] This was the most intense geomagnetic storm to hit Earth since September 2017.
This is the third geomagnetic storm to reach G4 status during the current 11-year solar cycle, which began in 2019, officials said.
The 2003 Halloween solar storms had a peak Dst index of −383 nT, although a second storm on 20 November 2003 reached −422 nT while not reaching G5-class. [16] [17] The March 1989 geomagnetic storm had a peak Dst index of −589 nT, [18] while the May 1921 geomagnetic storm has been estimated to have had a peak Dst index of −907 ± 132 nT.