The Second LHAASO Collaboration Conference in 2026 & The Academic Symposium for the 10th Anniversary of the LHAASO collaboration

The high-statistics cosmic-ray observations of LHAASO-KM2A enable daily studies of the cosmic-ray Sun shadow. Observations in 2022 reveal periodic variations in the Sun-shadow deficit that are consistent with those of contemporaneous solar activity. To explain this behavior, we construct the coronal magnetic field using HMI photospheric magnetic-field data and the PFSS/outflow model, and...

The Large High Altitude Air Shower Observatory (LHAASO), owing to its high altitude and large active area, is suitable for studying the effects of thunderstorms on cosmic ray air showers. In this work, the variations of shower events during a thunderstorm on May 27, 2025 were investigated by analyzing the data from KM2A (1.3 km², the largest sub-array of LHAASO). The results show that the...