I found a video on Youtube made in 1915 to 1917 when Mt. Lassen in California last erupted: June 17th 1917

The last big volcanic eruption in California was Mt. Lassen. Also, Mt. Shasta tends to go off about once every 100 years along with Mt. Rainier in Washington.

Here is the video made in 1915 to 1917 from Youtube:

Mt Lassen 1915 - YouTube

▶ 2:58

https://www.youtube.com/watch?v=nZD9K4q55jk

Apr 29, 2015 - Uploaded by Shasta Historical Society

One of the eruptions of Mt Lassen 100 years ago caught on film. According to a news account on June 1, 1917 ...

Eruptions