Heliospheric Weather Expert Service Centre - Statistical Products

Solar Energetic Particles

This section provides information on the solar energetic particle environment during yearly intervals. This is represented by the flux of 10 MeV and above proton particles measured at geostationary altitudes by the GOES spacecraft (>30MeV and >60MeV can also additionally be selected from the options for reference). The amount of time spent above one of five activity threshold limits will be calculated. Horizontal red lines are shown on the plot indicating the time intervals listed at the bottom of the page that match the user criteria.

The analysis is based on the OMNI database of upstream solar wind parameters produced by NASA.

The interval and threshold can be selected from the pull down menu. The time interval display cannot be edited directly. The mouse can be used to zoom the time selection (the Y scale is fixed). Pressing submit will recalculate the display for the new interval.

The SEP activity follows the 11 year solar cycle - currently (2020) we are approaching the declining solar minimum of solar cycle 24.

Please note that the OMNI data currently only contains energetic proton data until the end of March 2020.
The P* > 10 MeV option makes use of more recent solar energetic particle data from the UKMO SEP/E product.

Select year to process and flux limit to be applied
Processing for interval   
Show options

The following options allow some limited tailoring of the display elements.

Don't show the initial title
Don't show the time series plot
   Also show the integral flux for P > 30MeV
   Also show the integral flux for P > 60MeV
   Don't show intervals on the plot
   Show intervals outside rather than inside the range
   Invert the list of intervals
   Don't show the current Carrington phase
Don't show the stats table
Don't show the list of intervals
   Format list as linked VOTable
Show the onion skin plot
(Plot as a function of solar rotation with the line fading for older data)
Include a plot of Dst.
(Intervals with Dst < -50 nT are shown with a green line). NB: The plot is actually of SYM-H as the de facto high-resolution Dst.

You can also quickly jump to another parameter for the current time interval using the following links (other options are not retained):-







Print image
SWE Portal > H-ESC > HPARC > HPARC/ST > p > 10 MeV

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