Information about models, web updates and if you have any questions fell free to ask us at Forum
Cut-off rigidity evaluation Webmodel | Mailmodel with Tsyganenko 96 external geomagnetic field
Cut-off rigidity evaluation Webmodel | Mailmodel with Tsyganenko 05 external geomagnetic field
Models Authors | Contact


Cut-off rigidity models

Models to evaluate vertical cut-off rigidity by trajectory calculation in combined models of geomagnetic field.

All models use a combined internal (IGRF) and external (Tsyganenko 96, Tsyganenko 05) geomagnetic fields.

Web model / GeoMag-96 - evaluates allowed trajectories with rigidity step 0.1 GV in geomagnetic field from internal IGRF and external Tsyganenko 96 geomagnetic field model.

Mail model / GeoMag-96 - evaluates allowed trajectories with rigidity step 0.01 GV in geomagnetic field from internal IGRF and external Tsyganenko 96 models. Because calculation can take 10-20 minutes, results are sent to user also by email.

Web model / GeoMag-05 - evaluates allowed trajectories with rigidity step 0.1 GV in geomagnetic field from internal IGRF and external Tsyganenko 05 models.

Mail model / GeoMag-05 - evaluates allowed trajectories with rigidity step 0.01 GV in geomagnetic field from internal IGRF and external Tsyganenko 05 models. Because calculation can take 20-30 minutes, results are sent to user also by email.

For more information about models/physics look to articles mentioned in section Publications.

List of solar flares for years 2011,2012 and 2013 : LINK

The evaluation of solar energetic particle pressure analysis : LINK


Example of model results

Vertical cut-off rigidities on the Earth surface evaluated for 20. march 2004 12:00 UTC in model with Tsyganenko 96 external geomagnetic field.

List of evaluated cut-off rigidities (for 4050 positions, grid 2 degrees in geographical latitude and 8 deg. in longitude) in TABLE where

- first column is geo. latitude
- second column is geo. longitude
- 3rd column: lower cut-off rigidity in GV
- 4th column: upper cut-off rigidity in GV
- 5th column: effective cut-off rigidity in GV


Contour plot of effective vertical cut-off rigidities at 20. march 2004 12:00 UTC.



Plot of effective vertical cut-off rigidities at 20. march 2004 12:00 UTC.



Example of model results for one point at Earth surface


Asymptotic directions for vertically incoming particles to Lomnicky Stit (20.22 E, 49.2 N)
neutron monitor station at 20. march 2004 12:00 UTC evaluated in model with external field Tsyganenko 96.