ИСТИНА

Interplanetary coronal mass ejections (ICMEs) are among the main drivers of geomagnetic disturbances. The study of ICMEs and the construction of ICME propagation models constitute an important space weather problem. ICME catalogs formed via various criteria are used to validate such models; however, due to the diversity of ICME identification criteria information presented by different catalogs can vary significantly. A merging algorithm is proposed in this paper to enable the construction of a more complete database of ICMEs detected near Earth, and a unified catalog is built. We have examined the following catalogs over the period from 2010 to 2023: the Richardson & Cane ICME list (Richardson, I.G., Cane, H.V. // Sol Phys. 2010. V. 264. P. 189–237.), the ICME list of the CCMC CME Scoreboard service (Riley, P., Mays, L., Andries, J., Amerstorfer, et al. // Space Weather. 2018. V. 16. P. 1245.), and the SRI RAS Catalog of Large-Scale Solar Wind Phenomena (Yermolaev, Y.I., Nikolaeva, N.S., Lodkina, I.G. et al. // Cosmic Res. 2009. V. 47. P. 81. ). The unified catalog contains 681 events, 229 of which are present in more than one source catalog and 60 are present in all of them. The catalog is published on the SINP MSU Space Weather Center website: https://swx.sinp.msu.ru/tools/icme_list.php (Shiryaev A.O, Kaportseva K. // Memoirs of the Faculty of Physics. 2023. V. 4. P. 2341601). Each event in the catalog has been enriched with minimum Dst and average solar wind speed values from the OMNI database (J. H. King and N. E. Papitashvili // Journal of Geophysical Research: Space Physics. V. 110. P. 2104. 2005.. It has been established that events present in every source catalog typically occur with higher velocity and longer duration. The average duration and velocity of all events in the unified catalog is 22.6 hours and 419 km/s respectively, while for events which are also present in all three source catalogs it’s 31.2 hours and 456 km/s. Events which caused a disturbance of Dst < -75 nTl constitute 10% of all unified catalog, but 32% of the events which are also present in every source catalog. In other words, “stronger” events are more likely to be detected, regardless of ICME identification criteria used by catalogs. The George Mason University ICME list (http://solar.gmu.edu/heliophysics/index.php/GMU_CME/ICME_List) (GMU) and the WIND ICME Catalogue (Nieves-Chinchilla, T., A. Vourlidas, et al. // Solar Physics. 2018. V. 293.2 P. 25) have been analyzed to validate the completeness of the unified catalog and expand its magnetic cloud detection data. 97% of the events from the GMU list that fall within the considered timeframe are also present in the unified catalog. A comparison of the results of magnetic cloud detection between the Richardson & Cane list, the SRI RAS catalog and the GMU list has been performed. ICME body type detection matches for 21 events out of 53 that are defined in all three catalogs (40%).