Various geomagnetic indices (Kp, AE, Dst, SYM-H, PC) and averaged solar wind/IMF parameters quantify the energy supply in certain regions of the solar wind-magnetosphere-ionosphere system, and are used as primary tools in statistical studies of solar-terrestrial relationships. However, these indices characterize the steady-state level of the electrodynamics of the near-Earth environment. The turbulent character of solar wind drivers and the existence of natural MHD waveguides and resonators in the magnetospheric plasma in the ULF frequency range ( about 2 mHz to 10 mHz) ensures a quasi-periodic magnetic field response to forcing at the boundary layers. Therefore, much of the turbulent nature of plasma processes of solar wind-magnetosphere-ionosphere interactions can be monitored with ground-based or space observations in the ULF frequency range. We have constructed a new index, coined a ULF wave index, characterizing the turbulent character of the energy transfer from the solar wind into the upper atmosphere and the short-scale variability of near-Earth electromagnetic processes. We suppose that a wide range of space physics studies will benefit from the introduction of this new index.
Version:2.3.0
Various geomagnetic indices (Kp, AE, Dst, SYM-H, PC) and averaged solar wind/IMF parameters quantify the energy supply in certain regions of the solar wind-magnetosphere-ionosphere system, and are used as primary tools in statistical studies of solar-terrestrial relationships. However, these indices characterize the steady-state level of the electrodynamics of the near-Earth environment. The turbulent character of solar wind drivers and the existence of natural MHD waveguides and resonators in the magnetospheric plasma in the ULF frequency range ( about 2 mHz to 10 mHz) ensures a quasi-periodic magnetic field response to forcing at the boundary layers. Therefore, much of the turbulent nature of plasma processes of solar wind-magnetosphere-ionosphere interactions can be monitored with ground-based or space observations in the ULF frequency range. We have constructed a new index, coined a ULF wave index, characterizing the turbulent character of the energy transfer from the solar wind into the upper atmosphere and the short-scale variability of near-Earth electromagnetic processes. We suppose that a wide range of space physics studies will benefit from the introduction of this new index.
| Role | Person | |
|---|---|---|
| 1. | GeneralContact | spase://SMWG/Person/Mark.J.Engebretson |
Augsburg ULF Index Web Page hosted by the Virtual Radiation Belt Observatory, ViRBO
Documents concerning the MACCS Ground Station Chain, hosted by the Kyushu University Ultima Web Page
Web Page for access to these Data Files
Global ULF wave index (ground magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total power of index (ground magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total noise of index (ground magnetometer based) (Augsburg ULF data set 1-hour version 1)
Global ULF wave index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total power of index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total noise of index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Global ULF wave index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total power of index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total noise of index (GOES magnetometer based) (Augsburg ULF data set 1-hour version 1)
Total noise of index (Solar wind density based) (Augsburg ULF data set 1-hour version 1)