Determination of local geomagnetic K-index

Čop, Rudi; Deželjin, Damir; Reggi, Robert De

doi:10.15292/geodetski-vestnik.2015.04.697-708

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The determination of a magnetically calm day (Sq) follows from detection of changes in the geomagnetic field during days without unusual solar phenomena (sudden ionospheric disturbances). The magnetically calmest five or eight days during the month, with the index K below the selected minimal value [23], present the reference for further comparison. The sum of all eight geomagnetic indexes K of a single day gives the mean value.…”

Section: Geomagnetic Indexesmentioning

confidence: 99%

The Use of Geomagnetic Measurements to Study Local Tectonics: Case for the NE Part of the Adria-Eurasia Collisional Zone

Pavlovčič-Prešeren¹,

Čop²,

Kuhar³

2020

OJER

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Determination of the correlation between the energy-density changes in geomagnetic field and seismic events is a challenging scientific topic that allows the study of local tectonics using magnetometers. The magnetised properties of the crustal field of the Earth change due to natural sources and/or human activities that affect the environment. The latter can be avoided by setting up observatories in "geomagnetically-quiet" locations, while the natural sources, which describe the combined effects due to changes in the core, lithosphere, external or electromagnetically induced field, cannot be easily eliminated. This research focused on the investigation of local changes in the geomagnetic field in relation to evidently significant local tectonics in the vicinity of the PIA (Piran, Slovenia) geomagnetic observatory. It is obvious that geomagnetic measurements from PIA contain much higher levels of noise compared to the surrounding magnetometers in Italy and Croatia. According to previous geodynamic studies, the position of the PIA observatory is specific, since it is located at an Adriatic microplate that collides under the Eurasian plate. At this point it can be assumed that the reason for high-level noise in geomagnetic observations is due to the still ongoing Adria-Eurasia collisional process. Furthermore, the study of the earthquake on 1 November 2015 with a magnitude of 4.2 and its epicentre 150 km from PIA showed the correlation between higher energy density of the Earth's magnetic field and the earthquake occurrence. From the results acquired by the computational strategy described in the research, it is obvious that, as expected, a few days prior and after the earthquake higher Earth's magnetic field indicated some significant changes in the local geomagnetic field that might occur due to the increased stress in the Earth's crust in the northeastern part of the Adria-Eurasia collisional zone.

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Section: Geomagnetic Indexesmentioning

confidence: 99%

The Use of Geomagnetic Measurements to Study Local Tectonics: Case for the NE Part of the Adria-Eurasia Collisional Zone

Pavlovčič-Prešeren¹,

Čop²,

Kuhar³

2020

OJER

Self Cite

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“…Indeks K zajema le neciklične spremembe zemeljskega magnetnega polja, ki jih v triurnem časovnem intervalu povzročajo elementarni delci, izsevani s Sonca. Vse ostale ciklične in neciklične spremembe zemeljskega magnetnega polja kot tudi vsi ostali vplivi Sonca na Zemljo niso vključeni v geomagnetni indeks K (Mayaud, 1980;Čop, Deželjin in De Reggi, 2015). Med te vplive spadajo predvsem neposredni vplivi radiacij ultravijoličnih žarkov in žarkov X, ki spreminjajo količino hladne plazme v ionosferi.…”

Section: Geomagnetna Aktivnostunclassified

“…Prekinitve prenosa v realnem času po omrežju mobilne telefonije na območju, ki ga pokriva observatorij PIA, je mogoče napovedati na podlagi statistične obdelave sprememb lokalnega geomagnetnega indeksa K (Čop, Deželjin in De Reggi, 2015). Taka napoved velja vnaprej za obdobje enega efektivnega obrata Sonca.…”

Section: Sklepunclassified

Determination of local geomagnetic K-index

Cited by 2 publications

References 14 publications

The Use of Geomagnetic Measurements to Study Local Tectonics: Case for the NE Part of the Adria-Eurasia Collisional Zone

The Use of Geomagnetic Measurements to Study Local Tectonics: Case for the NE Part of the Adria-Eurasia Collisional Zone

Impact of the Sun on transmission of measuring data in real time by mobile telephone network

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