标题： 关于2024年5月极端地磁风暴期间的大Forbush效应特征 显示英文标题

标题： On the features of great Forbush effect during May 2024 extreme geomagnetic storm

摘要： 这项研究调查了银河宇宙射线密度和各向异性行为的特征及其与太阳源、行星际扰动和地磁扰动的关系，时间范围为2024年5月8日至5月13日。 在此期间，记录到了强烈的太阳耀斑和快速的日冕物质抛射（CME），导致了极端地磁风暴的发生，并且观测到了整个观测期间最显著的Forbush效应之一。 所有宇宙射线特性的计算均使用全球中子监测网络的数据以及IZMIRAN维护的独特方法完成：全球调查法和台站环法。 研究确定，所研究的Forbush效应的幅度为15.7％（对于10 GV刚度的粒子），并且由于记录到极端地磁风暴，中子监测器数据中观察到了显著的地磁场效应（约4％）。 显示英文摘要

摘要： The work investigates the features of galactic cosmic ray density and anisotropy behavior and their relation to solar sources, interplanetary and geomagnetic disturbances from May 8 to May 13, 2024. During this time, powerful solar flares and fast CMEs were recorded, leading to registration of an extreme geomagnetic storm along with one of the most significant Forbush effects for the entire observation period. All the calculations of cosmic ray characteristics are made using the data of global neutron monitor network and unique methods maintained at IZMIRAN: the Global Survey Method and the Ring of Stations Method. It is determined that the magnitude of Forbush effect under study was 15.7% (for particles with 10 GV rigidity) and as an extreme geomagnetic storm was recorded there was a significant magnetospheric effect observed in the data of neutron monitors (~4%).