Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations
Using a dynamical systems approach, we examine the persistence and predictability of geomagnetic perturbations across a range of different latitudes and levels of geomagnetic activity. We look at the horizontal components of the magnetic field measured on the ground between 13 and 24 March 2015, at...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/12/3031 |
| _version_ | 1797592773821464576 |
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| author | Tommaso Alberti Paola De Michelis Lucia Santarelli Davide Faranda Giuseppe Consolini Maria Federica Marcucci |
| author_facet | Tommaso Alberti Paola De Michelis Lucia Santarelli Davide Faranda Giuseppe Consolini Maria Federica Marcucci |
| author_sort | Tommaso Alberti |
| collection | DOAJ |
| description | Using a dynamical systems approach, we examine the persistence and predictability of geomagnetic perturbations across a range of different latitudes and levels of geomagnetic activity. We look at the horizontal components of the magnetic field measured on the ground between 13 and 24 March 2015, at approximately 40 observatories in the Northern Hemisphere. We introduced two dynamical indicators: the extremal index <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula>, which quantifies the persistence of the system in a particular state and the instantaneous dimension <i>d</i>, which measures the active number of degrees of freedom of the system. The analysis revealed that during disturbed periods, the instantaneous dimension of the horizontal strength of the magnetic field, which depends on latitude, increases, indicating that the geomagnetic response is externally driven. Furthermore, during quiet times, the instantaneous dimension values fluctuate around the state-space dimension, indicating a more stochastic and thus less predictable nature system. |
| first_indexed | 2024-03-11T01:58:53Z |
| format | Article |
| id | doaj.art-63689db921cc4a4d9d25ded05f0b6c19 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T01:58:53Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-63689db921cc4a4d9d25ded05f0b6c192023-11-18T12:25:24ZengMDPI AGRemote Sensing2072-42922023-06-011512303110.3390/rs15123031Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based ObservationsTommaso Alberti0Paola De Michelis1Lucia Santarelli2Davide Faranda3Giuseppe Consolini4Maria Federica Marcucci5Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, I-00143 Rome, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, I-00143 Rome, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Viale Francesco Crispi 43/45, I-67100 L’Aquila, ItalyLaboratoire des Sciences du Climat et de l’Environnement, CEA Saclay l’Orme des Merisiers, UMR 8212 CEA-CNRS-UVSQ, Université Paris-Saclay & IPSL, 91191 Paris, FranceINAF—Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyINAF—Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUsing a dynamical systems approach, we examine the persistence and predictability of geomagnetic perturbations across a range of different latitudes and levels of geomagnetic activity. We look at the horizontal components of the magnetic field measured on the ground between 13 and 24 March 2015, at approximately 40 observatories in the Northern Hemisphere. We introduced two dynamical indicators: the extremal index <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>θ</mi></semantics></math></inline-formula>, which quantifies the persistence of the system in a particular state and the instantaneous dimension <i>d</i>, which measures the active number of degrees of freedom of the system. The analysis revealed that during disturbed periods, the instantaneous dimension of the horizontal strength of the magnetic field, which depends on latitude, increases, indicating that the geomagnetic response is externally driven. Furthermore, during quiet times, the instantaneous dimension values fluctuate around the state-space dimension, indicating a more stochastic and thus less predictable nature system.https://www.mdpi.com/2072-4292/15/12/3031space weathergeomagnetic stormsmagnetospheric substormsground-based observatories |
| spellingShingle | Tommaso Alberti Paola De Michelis Lucia Santarelli Davide Faranda Giuseppe Consolini Maria Federica Marcucci Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations Remote Sensing space weather geomagnetic storms magnetospheric substorms ground-based observatories |
| title | Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations |
| title_full | Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations |
| title_fullStr | Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations |
| title_full_unstemmed | Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations |
| title_short | Tracking Geomagnetic Storms with Dynamical System Approach: Ground-Based Observations |
| title_sort | tracking geomagnetic storms with dynamical system approach ground based observations |
| topic | space weather geomagnetic storms magnetospheric substorms ground-based observatories |
| url | https://www.mdpi.com/2072-4292/15/12/3031 |
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