ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Analisi delle fluttuazioni geomagnetiche durante la tempesta di San Patrizio (2020)
    Details
    Publication Date: 2020-10-02
    Description: Il lavoro presenta uno studio preliminare delle fluttuazioni del campo geomagnetico registrate a terra presso 50 osservatori magnetici dislocatiin tutto l’emisfero borealenel corso della tempesta di San Patriziodel marzo 2015. L’applicazione del metodo “Empirical Mode Decomposition”, che ben si adatta all’analisi di segnali frutto di processi non lineari e non stazionari,permette la separazione delle fluttuazioni su diversa scala temporale (breve, 〈200 min,e lunga, 〉200 min). Il differente contributo al segnale sorgente delle fluttuazioni brevi e lunghe, associate a diversi processi magnetosferici, è analizzato in funzione della latitudine nel corso della tempesta geomagnetica.
    Description: Unpublished
    Description: GSSI, L'Aquila
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Keywords: Solar terrestrial relationship
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    “Characterization of the geomagnetic field fluctuations during St. Patrick’s Day Storm” (2020)
    Details
    Publication Date: 2020-10-02
    Description: We present a preliminary study of the properties of the magnetic field’s fluctuations during the St. Patrick’s Day geomagnetic storm occurred on 17 March 2015. We analyse the minute values of the geomagnetic field recorded simultaneously by a latitudinal network of 18 geomagnetic observatories located at different latitudes, from the equatorial regions to the northern high-latitude ones. We apply the Empirical Mode Decomposition (EMD) method to the X (North) and Y (East) components of the geomagnetic field recorded during a period (13 - 30 March 2015) covering the whole duration of the storm. This adaptive method, which can be applied to signals originating from nonlinear and non-stationary processes, permits us to separate fast (𝜏〈200 min) and slow (𝜏〉200 min) magnetic fluctuations, which are related to different magnetospheric processes. Indeed, it has been shown that whilemagneticfluctuationsat long timescales (𝜏〉200 min) showa large degree of correlationbetween solar windparameters and magnetosphericdynamicsproxies, at short timescales(𝜏〈200 min)theyareessentially related to internal magnetospheric processes andseem to be notdirectlydriven by interplanetarychanges. The differentenergycontribution of the fast and slow fluctuationsisinvestigatedas a function of latitudeduring the development of theselectedgeomagneticstorm.The weight of the signal related to the fluctuations on a short time scale shows a dependence on the latitude and geomagnetic activity level.
    Description: Unpublished
    Description: Vienna, Austria
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Keywords: Solar terrestrial relationship
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    “St. Patrick’s Day Storm: an analysis of the geomagnetic field fluctuations” (2020)
    Details
    Publication Date: 2020-10-02
    Description: We analyze minute values of ground-based geomagnetic fluctuations at about 50 observatories located at throughout the Northern Hemisphere during the St. Patrick's storm in March 2015. The application of the "Empirical Mode Decomposition" method, which is well suitable for the analysis of signals resulting from non-linear and non-stationary processes, it allows the separation of fluctuations on different time scales (short 〈 200 min, and long 〉 200 min). The different contribution to the source signal of short and long fluctuations, associated with different magnetospheric processes, is analyzed as a function of latitude during the geomagnetic storm. The weight of the signal related to the fluctuations on a short time scale shows a dependence on the latitude and geomagnetic activity level.
    Description: Published
    Description: Liegi, Belgio
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Keywords: Solar terrestrial relationship
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    “Multi-scale nature of the high-latitude magnetic field fluctuations” (2020)
    Details
    Publication Date: 2020-10-02
    Description: We analyze the properties of the geomagnetic field fluctuations during a period (13-30 March 2015) characterized by different geomagnetic activity levels including the strongest geomagnetic storm of XXIV solar cycle occurred on 17 March 2015. The one minute values of theX and Y componentsof the geomagnetic field recorded simultaneously in the Northern and Southern hemispheres are analyzed. The Empirical Mode Decomposition (EMD) method is applied to the selected dataset in order to separate short timescale (𝜏〈200 min) and long timescale(𝜏〉200 min) magnetic field fluctuations, which have been suggested to be related to different physical processes. It has been shown that while magnetic fluctuations at long timescales (𝜏〉200 min) show a large degree of correlation between solar wind parameters and magnetospheric dynamics proxies, at short timescales (𝜏〈200 min) they are essentially related to internal magnetospheric processes and seem to be not directly driven by interplanetary changes. Daily maps of the fast and slow magnetic field fluctuations during the selected period are analyzed to investigate the contributionsto the recorded magnetic signal related to the different magnetospheric processes and their dependence on the geomagnetic activity level. A comparison between the two hemispheres isalso shown.
    Description: Published
    Description: San Francisco
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Keywords: Solar terrestrial relationship
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...