5 papers
High-Energy Atmospheric Radiation: From Thunderstorm Ground Enhancements to Terrestrial Gamma-Ray Flashes
A. Chilingarian, L. Hovhannisyan, B. Sargsyan +1
This work presents a unified conceptual and observational framework that reinterprets these radiation bursts as manifestations of the same runaway processes happening at different…
The largest Forbush decrease in 20 years: Preliminary analysis of SEVAN network observations
A. Chilingarian, T. Karapetyan, B. Sargsyan
We present a preliminary analysis of the largest Forbush Decrease (FD) observed in solar cycle 25 using SEVAN network data. Triggered by consecutive Earth-directed CMEs on May 30 a…
Runaway processes in the upper and lower atmosphere: a change of paradigm
A. Chilingarian
Relativistic Runaway Electron Avalanches (RREA) are central to understanding a spectrum of high-energy atmospheric phenomena, including Terrestrial Gamma-ray Flashes (TGFs), Thunde…
Energy Spectra of Secondary Particles Induced by Solar Energetic Proton Events and Magnetospheric Effects
A. Chilingarian
We investigate the energy spectra of secondary cosmic ray particles associated with two distinct solar events: the magnetospheric effect (ME) of 5 November 2023 and ground-level en…
Wind-induced Natural Gamma Radiation
A. Chilingarian, B. Sargsyan, D. Aslanyan +1
During the extreme winter storms of 2024-2025 at Aragats, natural gamma radiation (NGR) increased by more than 1000%, with fluence reaching 2*10^7 gammas/cm^2 over 10 hours and a c…