Measurement of the stochasticity of low-latitude geomagnetic temporal variations
Ground magnetometer measurements of total magnetic field strength from 6 stations at low latitudes were analyzed using power spectrum and Hurst range scaling techniques. The Hurst exponents for most of these time-series were near 0.5, which indicates stochasticity, with the highest latitude...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2003-09-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/21/2025/2003/angeo-21-2025-2003.pdf |
| _version_ | 1811230109637541888 |
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| author | J. A. Wanliss M. A. Reynolds |
| author_facet | J. A. Wanliss M. A. Reynolds |
| author_sort | J. A. Wanliss |
| collection | DOAJ |
| description | Ground magnetometer
measurements of total magnetic field strength from 6 stations at low latitudes
were analyzed using power spectrum and Hurst range scaling techniques. The
Hurst exponents for most of these time-series were near 0.5, which indicates
stochasticity, with the highest latitude stations exhibiting some persistence
with Hurst exponents greater than 0.6. Although no definite correlations are
evident, the relative increase of the Hurst exponent with latitude suggests the
possibility that the underlying dynamics of the magnetosphere change with
latitude. This result may help quantify the dynamics of the inner magnetosphere
itself without the direct presence of the solar wind driver.<br><br><b>Key words. </b>Magnetospheric physics (magnetospheric
configuration and dynamics; plasmasphere) – Space plasma physics (nonlinear
phenomena) |
| first_indexed | 2024-04-12T10:24:40Z |
| format | Article |
| id | doaj.art-3ce53715bcf04be6946249ef319c6887 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-12T10:24:40Z |
| publishDate | 2003-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-3ce53715bcf04be6946249ef319c68872022-12-22T03:37:00ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762003-09-01212025203010.5194/angeo-21-2025-2003Measurement of the stochasticity of low-latitude geomagnetic temporal variationsJ. A. Wanliss0M. A. ReynoldsDepartment of Physical Sciences, Embry-Riddle Aeronautical University, 600 S. Clyde Morris Blvd., Daytona Beach, FL 32114, USAGround magnetometer measurements of total magnetic field strength from 6 stations at low latitudes were analyzed using power spectrum and Hurst range scaling techniques. The Hurst exponents for most of these time-series were near 0.5, which indicates stochasticity, with the highest latitude stations exhibiting some persistence with Hurst exponents greater than 0.6. Although no definite correlations are evident, the relative increase of the Hurst exponent with latitude suggests the possibility that the underlying dynamics of the magnetosphere change with latitude. This result may help quantify the dynamics of the inner magnetosphere itself without the direct presence of the solar wind driver.<br><br><b>Key words. </b>Magnetospheric physics (magnetospheric configuration and dynamics; plasmasphere) – Space plasma physics (nonlinear phenomena)https://www.ann-geophys.net/21/2025/2003/angeo-21-2025-2003.pdf |
| spellingShingle | J. A. Wanliss M. A. Reynolds Measurement of the stochasticity of low-latitude geomagnetic temporal variations Annales Geophysicae |
| title | Measurement of the stochasticity of low-latitude geomagnetic temporal variations |
| title_full | Measurement of the stochasticity of low-latitude geomagnetic temporal variations |
| title_fullStr | Measurement of the stochasticity of low-latitude geomagnetic temporal variations |
| title_full_unstemmed | Measurement of the stochasticity of low-latitude geomagnetic temporal variations |
| title_short | Measurement of the stochasticity of low-latitude geomagnetic temporal variations |
| title_sort | measurement of the stochasticity of low latitude geomagnetic temporal variations |
| url | https://www.ann-geophys.net/21/2025/2003/angeo-21-2025-2003.pdf |
| work_keys_str_mv | AT jawanliss measurementofthestochasticityoflowlatitudegeomagnetictemporalvariations AT mareynolds measurementofthestochasticityoflowlatitudegeomagnetictemporalvariations |