Solar Storm Alert: Geomagnetic Storm Expected To Hit Earth On March 9
The National Oceanic and Atmospheric Administration (NOAA) has issued a minor geomagnetic storm watch for March 9th. A solar wind stream is expected to graze Earth’s magnetic field, potentially causing a G1-class storm.
A G1 is the lowest level of geomagnetic storm on the scale. Normally, this weak solar wind stream would not be enough to trigger a magnetic storm. However, at this time of year, the equinox Russell-McPherron effect means even minor solar wind can impact Earth’s magnetosphere.
Earth’s rotational axis is perpendicular to the Sun during the equinoxes in March and September. This geometry makes our magnetic field more susceptible to solar wind disturbances. The Russell-McPherron effect describes how the equinox orientation amplifies the impact of solar wind on our magnetosphere.
Potential Aurora
If the predicted G1 storm occurs, it could generate visible aurora at higher latitudes. The aurora oval may expand, allowing auroras to be seen farther from the poles than normal. However, a G1 storm is relatively minor, so aurora’s potential is limited.
While fascinating visually, even minor geomagnetic storms can affect technologies like GPS, satellite operations, and power grids. Charged particles from the solar wind can create disturbances. That said, the impacts of a G1 storm are expected to be minimal and short-lived based on the forecast.
