Publication Date:
2017-09-28
Description:
Since March 2014, there is a continuous measurement of secondary cosmic rays (CRs) by the detector system SEVAN (Space Environmental Viewing and Analysis Network) at Lomnický štít, altitude 2634 masl. Starting from June 2016, the count rates (1s resolution) obtained from the three SEVAN detectors and from their coincidences are available, along with selected meteorological characteristics. Since May 30, 2016 the electric field measurements have been installed at the same site. Several events with clear increase of the count rate in the upper detector of SEVAN were observed during the thunderstorms until September 17, 2016. Examples of these measurements are presented and discussed. Barometric pressure correction and elimination of low frequency variability from the signal allows to extract 2 min averaged increases from the data. It is shown that the 2 min averaged increases of count rates measured by SEVAN correspond with periods of high electric field (with higher probability during negative polarity) rather than with the individual discharges (lightning).
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
