Presumably not: The Hunga Tonga-Hunga Ha'apai volcano impact was mainly an oceanic issue and very distant from the October 29, 2024, Valencia+Region impact. The listed weather conditions in early 1940 most likely have been caused by ‘atmospheric turbulences’ (deviations from normal), due to huge military activities in Far-East between the Soviet Union and Japan in Aug/Sept 1939, https://www.2030climate.com/a2005/02_33-Dateien/02_33.html , and in Northern Europe “West Wind lost - Europe cut off” https://www.2030climate.com/a2005/02_12-Dateien/02_12.html, but particularly due to the occupation of Poland, activities at sea and the Russian’s assault on Finland since December 1939.