Scaling in long term data sets of geomagnetic indices and solar wind ϵ as seen by WIND spacecraft [PDF]
, 2003 We study scaling in fluctuations of the geomagnetic indices (AE, AU, and AL) that provide a measure of magnetospheric activity and of the ε parameter which is a measure of the solar wind driver.
Angelopoulos +28 more
core +3 more sources
The Geomagnetic Kp Index and Derived Indices of Geomagnetic Activity
Space Weather, 2021 The geomagnetic Kp index is one of the most extensively used indices of geomagnetic activity, both for scientific and operational purposes. This article reviews the properties of the Kp index and provides a reference for users of the Kp index and ...
J. Matzka +4 more
doaj +1 more source
Deep Neural Networks With Convolutional and LSTM Layers for SYM‐H and ASY‐H Forecasting
Space Weather, 2021 Geomagnetic indices quantify the disturbance caused by the solar activity on a planetary scale or in particular regions of the Earth. Among them, the SYM‐H and ASY‐H indices represent the (longitudinally) symmetric and asymmetric geomagnetic disturbance ...
Armando Collado‐Villaverde +2 more
doaj +1 more source
Effects of solar wind magnetosphere coupling recorded at different geomagnetic latitudes: Separation of directly-driven and storage/release systems [PDF]
, 2008 The effect on geomagnetic activity of solar wind speed, compared with that of the strength of the interplanetary magnetic field, differs with geomagnetic latitude.
A. P. Rouillard +22 more
core +1 more source
A Detection Study of the Ionospheric Total Electron Contents Variations Using GPS Network [PDF]
Journal of Astronomy and Space Sciences, 2007 We established a regional ionospheric model for investigating ionospheric TEC (Total Electron Contents) variations over the Korean Peninsula during major geomagnetic storms.
Byung-Kyu Choi +2 more
doaj +1 more source
Mutual information between geomagnetic indices and the solar wind as seen by WIND : implications for propagation time estimates [PDF]
, 2005 The determination of delay times of solar wind conditions at the sunward libration point to effects on Earth is investigated using mutual information. This measures the amount of information shared between two timeseries.
Blanchard +17 more
core +3 more sources
Journal of Space Weather and Space Climate, 2014 Extreme geomagnetic storms are considered as one of the major natural hazards for technology-dependent society. Geomagnetic field disturbances can disrupt the operation of critical infrastructures relying on space-based assets, and can also result in ...
Cid Consuelo +4 more
doaj +1 more source
Did Open Solar Magnetic Field Increase during the Last 100 Years: A Reanalysis of Geomagnetic Activity [PDF]
, 2004 Long-term geomagnetic activity presented by the aa index has been used to show that the heliospheric magnetic field has more than doubled during the last 100 years. However, serious concern has been raised on the long-term consistency of the aa index and
Karinen, A., Martini, D., Mursula, K.
core +2 more sources
Geomagnetic disturbances analysis using discrete wavelets [PDF]
Geofísica Internacional, 2008 To assess long-term trends and periodicities in geomagnetic storms, the discrete wavelet transform, using the Daubechies function, was applied. Among a variety of techniques, which are available for analyzing variability, wavelet analysis has emerged in ...
E. M. Zotto +2 more
doaj
Organization of the magnetosphere during substorms [PDF]
, 2011 The change in degree of organization of the magnetosphere during substorms is investigated by analyzing various geomagnetic indices, as well as interplanetary magnetic field z-component and solar wind flow speed.
Abarbanel +44 more
core +2 more sources