title: Mixed-polarity magnetic fields in the area of a seismic source associated with a large proton solar flare
abstract: We found observational evidence of a close contact of strong magnetic fields with opposite magnetic polarities in the area of a seismic source connected with the large proton solar flare of October 28, 2003 of X17.2/4B class. The observations were carried out with the Echelle spectrograph of the Astronomical Observatory of Taras Shevchenko National University of Kyiv. Our analysis is based on the observations of I V profiles of nine spectral FeI lines with different Lande factors and height of f
journal: Journal of Physical Studies