The rim of this crater is generally circular, but with some irregularities. There is a small outward bulge in the rim to the east-southeast, and an inward bulge on the opposite face. There is also a slight outward bulge along the north rim. The satellite crater Blazhko F is attached to the exterior of the east rim. The inner wall along the northeast face is striated with terraces. The interior floor is relatively level.
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763. S2CID122125855.