- Purpose:
-
The purpose of the Active Region Helicity Injection forecasting project
is to provide
long-term warning of the potential eruptive events from the Sun. Solar
active regions with highly twisted (helical) magnetic fields are
thought to have a higher than average probability for producing
eruptive events such as coronal mass ejections (CME) than other regions.
The forecasting tool computes the rate at which fields are being twisted,
that is, at which helicity is being injected into the solar atmosphere.
Statistical occurrence of helicity injection prior to CME launch
would give warning longer than the 2 to 3 days that the CME spends
to travel from the Sun to the distance of the Earth's
orbit. CMEs that impact the Earth's magnetosphere producer
geomagnetic disturbances. This application can thus offer a longer warning
interval of the possiblity of geomagnetic activity.
- Input:
-
Solar magnetic field image data, auxiliary information on active region flares,
CME and Type II occurences, solar wind energetic particle fluxes and magnetic
fields, and geomagnetic K- index.
- Output:
-
The output of the Helicity Injection software is
a map showing the locations of
solar active regions detected as well as
measured values of helicity injection and other region parameters
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