When did Martin post his theses and in what language and why?

October 31, 1517

Explanation:

He wrote it in the Latin so only the educators,Priests and teachers could read it but soon enough people translated it to German

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.