Solar wind parameters and geomagnetic indices for severe (SYM-H < -100nT) geomagnetic storms over two solar cycles

• Main Authors: S Lotz, C Grant, M Davel
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Abisko
• Online Access: https://doi.org/10.5281/zenodo.7385460

Severe storms data set (1996-2019) Lotz, Grant, Davel (2022). This data set is curated from 1-minute time resolution OMNI [4] and INTERMAGNET [7] data, spanning the period 1996 - 2019. It consists of all geomagnetic storms that reached minimum SYM-H (Symmetric-H index) of < -100 nT. We classified these as "severe" storms. There are 115 such events in the period 1996 - 2018. No severe storms detected between 2007-2010 or in 2019. Each file in the set contains the events in that year (YYYY) in the format "severe_YYYY.pickle". The geomagnetic storms are identified by the procedure described in [1], with thresholds -100 nT and -20 nT (see [1] for further detail). The data sets are Pandas "dataframes" [2], saved in the Python "pickle" format [3]. Each dataframe contains 23 variables, listed in the table below, with their description and unit. Fourteen of the parameters are solar wind plasma and magnetic field parameters from the High Resolution OMNI data set [4]. There are 7 geomagnetic variables: one is the global Sym-H index, four are H-component geomagnetic observations fromHermanus, South Africa (HER: 34.4 S, 19.22 E) and Abisko, Sweden (ABK: 68.35 N, 18.82 E) and their time derivatives two are the e_h index [5] calculated at HER and ABK Finally, we list the time shift applied to each data point to shift to the bow shock nose (described for OMNI at [6]) and a string identifier for each geomagnetic storm. <caption> Variables included in the dataframes. </caption> # Name Description Unit 1 time_shift Time shift applied to shift solar wind parameters to bow shock s 2 Bt Magnitude of interplanetary magnetic field (IMF) nT 3 Bx X-component of IMF nT 4 By_GSE Y-component of IMF (GSE coordinates) nT 5 Bz_GSE Z-component of IMF (GSE coordinates) nT 6 By_GSM Y-component of IMF (GSM coordinates) nT 7 Bz_GSM Z-component of IMF (GSM coordinates) nT 8 Vsw Bulk solar wind speed km/s 9 Vx X-component of solar wind km/s 10 Vy Y-component of solar wind km/s 11 Vz Z-component of solar wind km/s 12 Np Proton number ...