Analytic Geomagnetic and Geoelectric Fields

Analytic Geomagnetic and Geoelectric Fields

Citation Author(s):
David
Boteler
Risto
Pirjola
Luis
Marti
Submitted by:
David Boteler
Last updated:
Sun, 09/01/2019 - 19:56
DOI:
10.21227/gnev-dd52
Data Format:
License:
Creative Commons Attribution
Dataset Views:
127
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Geomagnetic field variations produce geoelectric fields that can affect the operation of technological networks at the Earth’s surface, including power systems, pipelines, phone cables and railway circuits. To assess the geomagnetic hazard to this technology, it is necessary to model the geomagnetically induced currents (GIC) produced in these systems during geomagnetic disturbances. This requires use of geomagnetic data with appropriate Earth conductivity models to calculate the geoelectric fields that drive GIC. To provide a way of testing geoelectric field calculation software, we provide a benchmark test case by defining a synthetic geomagnetic field variation and deriving exact analytic expressions for the Earth response based on both uniform and layered Earth conductivity models. These are then used to provide exact analytic expressions for the geoelectric fields that would be produced by the synthetic geomagnetic field variation.  The synthetic geomagnetic data can be used as input to numerical geoelectric field calculation software, the output of which can be tested by comparison with the analytically-generated geoelectric fields.

Instructions: 

The dataset contains files of geomagnetic and geoelectric field values generated by analytic calculations. These are provided for testing software used for calculating geoelectric fields produced by geomagnetic disturbances.

The geomagnetic field dataset is to be used as a test input to geoelectric field calculation software.

The analytic geoelectric field datasets are to be used for checking the output from geoelectric field calculation software.  The paper (Boteler et al, 2019) shows the accuracy that can be achieved with real software if the calculations are set up correctly.

Two sets of data are provided:  One sampled once a second and containing 7 frequency components, and one sampled once a minute and containing 6 frequency components (ie with the highest frequency component removed).

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[1] , "Analytic Geomagnetic and Geoelectric Fields", IEEE Dataport, 2019. [Online]. Available: http://dx.doi.org/10.21227/gnev-dd52. Accessed: Sep. 20, 2019.
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. (2019). Analytic Geomagnetic and Geoelectric Fields. IEEE Dataport. http://dx.doi.org/10.21227/gnev-dd52
, 2019. Analytic Geomagnetic and Geoelectric Fields. Available at: http://dx.doi.org/10.21227/gnev-dd52.
. (2019). "Analytic Geomagnetic and Geoelectric Fields." Web.
1. . Analytic Geomagnetic and Geoelectric Fields [Internet]. IEEE Dataport; 2019. Available from : http://dx.doi.org/10.21227/gnev-dd52
. "Analytic Geomagnetic and Geoelectric Fields." doi: 10.21227/gnev-dd52