Dear Martin, You might find this interesting.
Today the Taal volcano in Luzon, Philippines, erupted in a violent way sending an ash plume as high as 16 km (55.000 ft). The last time this volcano erupted was in 1977. This is 43 years ……………….
https://www.armstrongeconomics.com/international-news/nature/taal-volcano-erupts-in-philippines/