Results 11 to 20 of about 1,292 (208)

Front Matter

open access: yesGeophysical 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

Association Between Geomagnetic Activity and Unsuccessful Out-of-Hospital Cardiac Arrest. [PDF]

open access: yesGeohealth
Abstract Out‐of‐hospital cardiac arrests (OHCAs) represent a significant global health challenge, with a survival rate <10%. Recent research has demonstrated that geomagnetic activity (GMA) can disrupt the circadian rhythm. Therefore, GMA may affect patient outcomes after an OHCA event wherein resuscitation is attempted.
Vencloviene J   +6 more
europepmc   +2 more sources

Solar flares and variation of local geomagnetic field: Measurements by the Huancayo Observatory over 2001-2010 [PDF]

open access: yesSerbian 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

open access: yesData 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   +1 more source

Long-term variations in the geomagnetic activity level Part II: Ascending phases of sunspot cycles [PDF]

open access: yesAnnales 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

Solar, ionospheric and geomagnetic indices

open access: yesAnnals 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   +1 more source

Unified Geomagnetic Database from Different Observation Networks for Geomagnetic Hazard Assessment Tasks

open access: yesData 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]

open access: yesGeofísica 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

Deep Neural Networks With Convolutional and LSTM Layers for SYM‐H and ASY‐H Forecasting

open access: yesSpace 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

A Detection Study of the Ionospheric Total Electron Contents Variations Using GPS Network [PDF]

open access: yesJournal 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

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