In 2010, it was published an analysis of the impact of geological activity on the main astronomical observatories worldwide (Eff-Darwich et al., 2010), among them, Roque de los Muchachos observatory (ORM), in the island of La Palma, Canary Islands (Spain). In this work, we compare the results on geological risk at ORM that were obtained in 2010 with the actual impact of Cumbre Vieja eruption. In this sense, we studied the effects of seismicity, ash fall, landslides and ground deformation at ORM. In general, we found a good agreement between the expected and actual impact of volcanic activity at the observatory; however, large differences were found in the distribution of ash fall, likely due to the improper characterization of the atmospheric inversion layer in the model of the dispersion of the volcanic plume. Eff-Darwich, A., García-Lorenzo, B., Rodríguez-Losada, J., de la Nuez, J., Hernández-Gutiérrez, L., Romero, C., Monthly Notices of the Royal Astronomical Society, Volume 407, Issue 3, September 2010, Pages 1361-1375, https://doi.org/10.1111/j.1365-2966.2010.16925.x