Diagnosing a Solar Flaring Core with Bidirectional Quasi-periodic Fast Propagating Magnetoacoustic Waves

Quasi-periodic fast propagating (QFP) waves are often excited by solar flares, and could be trapped in the coronal structure with low Alfvén speed, so they used as a tool for diagnosing both flaring core magnetic waveguide. As periodicity of QFP wave originate from periodic source or dispersively waveguided, it is key parameter In this paper, we study two Geostationary Operational Environmental Satellite-class C1.3 flare occurring at active region NOAA 12734 on 2019 March 8. Two were guided oppositely oriented funnels. The periods identical roughly equal to period oscillatory signal X-ray 17 GHz radio emission released core. It very likely that periodically Many features event consistent tuning fork model. We also investigated seismological application waves, found field inferred magnetohydrodynamic seismology was obtained extrapolation Our suggests good