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A geomagnetic storm, also known as a magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave. The disturbance that drives the magnetic storm may be a solar coronal mass ejection (CME) or (much less severely) a co-rotating interaction region (CIR), a high-speed stream of solar wind originating ...
The NOAA G-scale describes the significance of effects of a geomagnetic storm to the public and those affected by the space environment. It is directly derived from the K p-scale, where G1 is the weakest storm classification (corresponding to a K p value of 5) and G5 is the strongest (corresponding to a K p value of 9). [6]
An extreme (G5) geomagnetic storm alert was issued by the National Oceanic and Atmospheric Administration (NOAA) – the first in almost 20 years. [ 96 ] [ 97 ] The final storms reaching the highest level of NOAA's G-scale before Solar Cycle 25 occurred in 2005 in May, [ 98 ] [ 99 ] [ 100 ] August, [ 101 ] and September, respectively.
Geomagnetic storms can also add energy to currents in Earth's magnetic field that can increase distribution of density in the upper atmosphere and cause extra drag on low-orbiting satellites.
This is the third geomagnetic storm to reach G4 status during the current 11-year solar cycle, which began in 2019, officials said.
Americans from Arizona to Delaware got a look at the northern lights on Oct. 10 as a result of a geomagnetic storm impacting the Earth. A second view could be in play tonight, too.. The storm is a ...
The solar storms of May 2024 were a series of powerful solar storms with extreme solar flares and geomagnetic storm components that occurred from 10–13 May 2024 during solar cycle 25. The geomagnetic storm was the most powerful to affect Earth since March 1989 , [ a ] and produced aurorae at far more equatorial latitudes than usual in both ...
Historically, G4 storms are common during a solar cycle, but G5, or extreme geomagnetic storms such the one that occurred on May 10, are incredibly rare, Dahl said. This new storm has a 25% chance ...