Vol. 6, Issue 2, Part A (2024)

Ground‐level enhancements (GLEs) are sudden, sharp, and short‐lived increases in cosmic ray intensities registered by neutron monitors (NM). These enhancements are known to take place during powerful solar eruptions. In the present investigation, the cosmic ray intensity registered by Oulu neutron monitor have been studied for the period of May 9, 2024 to May 11, 2024. GLE event on May 11 2024 has been registered by Oulu & DOMC Neutron monitor with increase of 5.86% & 4.65 respectively. In addition, the solar causes responsible for the enhancement of CRI have been studied. It is found, the GLE 74 event was associated with strong solar flares of class X (X5.8), CMEs (Halo CME) and SEP fluxes. All other parameters related to space weather investigated and found that there is a positive correlation between Solar Wind plasma Temperature (SWPT) and Interplanetary Magnetic Field B (nT), strong negative Correlation between Geomagnetic field indicees Dst (nT). GLE‐associated CMEs was much faster than the average speed of non‐ GLE‐associated CMEs. Although a GLE event is often associated with a fast CME, this alone does not necessarily cause the enhancement. Solar flares with strong optical signatures may sometimes cause GLE. High SEP fluxes often seem to be responsible for causing GLEs as the correlation with SEP fluxes implies.