The Response of the Multichannel Detector Complex of the Tien Shan Cosmic Ray Station to an Event of Ground-Level Enhancement and Large Forbush Effects in November 2025 and January 2026

A. L. Shepetov, O. N. Kryakunova, Rustam Koichubayev, Nikolay Nikolayevskiy, Serik Nurakynov, V. A. Ryabov, Botakoz Seifullina, I. L. Tsepakina, Ludmila Vildanova, Valery Zhukov

2026

Full text Open access: Gold Metadata (CSL-JSON)
DOI 10.3390/sym18081287
Data confidence 70 medium
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Abstract

Large episodes of solar activity of the 25th cycle, an extreme Forbush decrease event on 19 January 2026, a series of Forbush effects in November 2025, and an event of ground-level enhancement (GLE 77) on 11 November 2025 have left prominent traces in the monitoring data obtained at a height of 3340 m a.s.l. from the detector facilities of the Tien Shan High-Mountain Cosmic Ray Station. The effects these events have caused on the flux of galactic cosmic rays in the several-GeV energy range, as registered with the standard NM64-type neutron supermonitor, are compared here with their influence on the local neutron and gamma radiation background in the high-mountain environment, which was observed in the counting rate records of the thermal neutron and MeV-order-energy gamma radiation detectors also installed at the station.