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
Impact of ICME- and SIR/CIR-Driven Geomagnetic Storms on the Ionosphere over Hungary
Atmosphere, 2023 We investigate the differences between the effects of geomagnetic storms due to Interplanetary Coronal Mass Ejections (ICME) and due to Stream Interaction Regions or Corotating Interaction Regions (SIR/CIR) on the ionospheric F2-layer during the maximum ...
Kitti Alexandra Berényi +4 more
doaj +1 more source
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
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
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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]
, 2004 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.
Angelopoulos +45 more
core +2 more sources
On the Influence of the Data Sampling Interval on Computer-Derived K-Indices [PDF]
, 2011 The K index was devised by Bartels et al. (1939) to provide an objective monitoring of irregular geomagnetic activity. The K index was then routinely used to monitor the magnetic activity at permanent magnetic observatories as well as at temporary ...
Bernard, Armelle +2 more
core +6 more sources
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
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Data Science Journal, 2020 This paper presents the results of the creation of a geomagnetic data storage system that combines raw observation data from different geomagnetic observation networks along with derived indices and indicators of geomagnetic activity.
Michael Dobrovolsky +2 more
doaj +1 more source
Comparison between indices during geomagnetic disturbances [PDF]
Geofísica Internacional, 2004 Auroral indices AE, AU, AL, and Troshichev index from Thule, PC (Polar Cap) are compared for geomagnetic disturbances of different intensities. To identify perturbations, the indices Dst and AE have been used. Fourteen storms have been analyzed, with Dst
Marta Zossi de Artigas +1 more
doaj +3 more sources