Data set about local mapping of the Earth's magnetic field

The data presented in this article are related to the research article entitled "Magnetic field and its experimental measurement in teaching in high schools" (J. Beňuška, D. Polčin, 2016) [1]. The article describes the possibilities of relatively accurate experimental measurement of magnetic field in any geographical conditions, in both exteriors and interiors, without the need for special instrumentation, with minimal financial costs. The data set is publicly available to allow the comparison of magnetic induction values in given latitudes with the other latitudes by the given methods and a critical analysis of the applicability of these methods in areas and locations without more demanding instrumentation.


a b s t r a c t
The data presented in this article are related to the research article entitled "Magnetic field and its experimental measurement in teaching in high schools" (J. Beňuška, D. Polčin, 2016) [1].
The article describes the possibilities of relatively accurate experimental measurement of magnetic field in any geographical conditions, in both exteriors and interiors, without the need for special instrumentation, with minimal financial costs.
The data set is publicly available to allow the comparison of magnetic induction values in given latitudes with the other latitudes by the given methods and a critical analysis of the applicability of these methods in areas and locations without more demanding instrumentation.
& The magnitude of the magnetic field induction of the Earth's magnetic field was measured by two simple methods to compare their accuracy. Experimental features The regional dynamics of magnetic field changes were monitored by comparing of measurements in different time periods. There were regional dynamics of the Earth's magnetic field changes observed in the given area.

Data accessibility
The data are available with this article.

Value of the data
The data provide information about the horizontal magnetic induction component of the Earth's magnetic field in the region and may be used by other scientists at geomagnetic mapping.
The observed dynamics of local magnetic field changes can supplement the data on its spatial and temporal dynamic properties for specialized observatories.
These data allow other researchers to complement the network of geomagnetic observations and thus partly specify the magnetic field distribution map

Data
The data set of this article provides information about the measured magnitude of the horizontal magnetic induction component of the Earth's magnetic field in the selected geographical location.

Measurement of the horizontal component of the magnetic induction of the Earth's magnetic field by a thread rotation
The experiment is designed to measure the magnitude of the magnetic induction of the Earth's magnetic field in our latitude by means of a rotating conductor in which the voltage is induced by Faraday's law of electromagnetic induction, with changes in magnetic induction current through the surface described by the conductor.

Materials:
fixed wire (20 m) loaded in the middle by a tennis ball, milivoltmeter, stopwatch, length gauge, compass to determine the correct direction -the surface plane of the thread must be perpendicular to the direction south-north.
When spinning the wire in the magnetic field of the Earth in the south-north direction, there is a constant change in the thread area through which the magnetic induction lines pass. This changes the magnetic induction flux and induces the voltage we measured in the thread. The magnetic induction value was calculated from it.  By setting the electric current in a circular coil so that the magnet against the north is at an angle of 45°, we get the equation of magnetic induction magnitude of the magnetic field of the coil B C and of the Earth B Z . From this equation, magnetic induction values were calculated.
Finally, we compared the data measured with both methods. We analyzed the dynamics of magnetic field changes by comparing data acquired in two different time periods.

Transparency document. Supporting information
Transparency data associated with this article can be found in the online version at http://dx.doi. org/10.1016/j.dib.2018.01.112.