Solar, ionospheric and geomagnetic indices
Annals of Geophysics, 1998 The most common solar, ionospheric and geomagnetic indices are here presented with particular reference to their application for radiocommunication prediction purposes. Summary tables of practical use are also included concerning the method of derivation
G. De Franceschi, L. Perrone
doaj +4 more sources
The Contribution of a Geophysical Data Service: The International Service of Geomagnetic Indices
Data Science Journal, 2013 Geomagnetic indices are basic data in Solar-Terrestrial physics and in operational Space Weather activities. The International Service of Geomagnetic Indices (ISGI) is in charge of the derivation and dissemination of the geomagnetic indices that are ...
M Menvielle
doaj +2 more sources
New Regional Geomagnetic Indices for the Russian Sector of the Geomagnetic Observation Network
Russian Journal of Earth SciencesIt was proposed to introduce new regional geomagnetic indices SME-R and VAR characterizing the values of the geomagnetic field perturbation and its variability (i.e., dB/dt) in the Russian sector at auroral latitudes into space weather studies.
Vorobev Andrey +5 more
doaj +2 more sources
Geomagnetic Impulses and the Electrical Conductivity of the Lower Mantle [PDF]
, 1991 This thesis is an investigation of the changes in the magnetic field as measured at the surface of the Earth on the time-scale of months to decades. In particular the phenomena of geomagnetic "impulses" or "jerks" are investigated.
Stewart, Douglas Norman
core +7 more sources
Plasmaspheric dynamics resulting from the hallowe'en 2003 geomagnetic storms [PDF]
, 2009 Cross-phase-derived plasma mass density trends during the Hallowe'en 2003 geomagnetic storms are presented for 38° magnetic latitude 63° (1.61 ≤ L ≤ 5.10), using data from the SAMNET (Subauroral Magnetometer Network), BGS (British Geological Survey), and
Zhang, T.L. +5 more
core +4 more sources
Geophysical Monograph Series, Page i-xiv., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
wiley +2 more sources
Solar flares and variation of local geomagnetic field: Measurements by the Huancayo Observatory over 2001-2010 [PDF]
Serbian Astronomical Journal, 2017 We study the local variation of the geomagnetic field measured by the Huancayo Geomagnetic Observatory, Peru, during 2001-2010. Initially, we sought to relate the SFI values, stored daily in the NOAA's National Geophysical Data Center, with the ...
Carlos Reyes Rafael E. +2 more
doaj +1 more source
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.
Chapman, S.C. +8 more
core +2 more sources
Long-term variations in the geomagnetic activity level Part II: Ascending phases of sunspot cycles [PDF]
Annales Geophysicae, 1994 Monthly averages of the Helsinki Ak-values have been reduced to the equivalent aa-indices to extend the aa-data set back to 1844. A periodicity of about five cycles was found for the correlation coefficient (r) between geomagnetic indices and sunspot ...
V. Mussino +3 more
doaj +1 more source
Scaling and a Fokker-Planck model for fluctuations in geomagnetic indices and comparison with solar wind as seen by Wind and ACE [PDF]
, 2005 The evolution of magnetospheric indices on temporal scales shorter than that of substorms is characterized by bursty, intermittent events that may arise from turbulence intrinsic to the magnetosphere or that may reflect solar wind-magnetosphere coupling.
Hnat, B. +2 more
core +1 more source