The Lassen Peak volcano in California produced one of the largest volcanic eruptions in the entire Cascade Mountain range of the last 1 million years. This eruption covered nearby areas in as much as 250 feet or 76 meters of ash in a timespan of less than 24 hours. Despite the size of the eruption, its occurrence has been largely hidden by subsequent volcanic activity. So, how long ago did this eruption occur? Why is this apparent volcano no longer visible? This video will answer these two questions and discuss this caldera forming eruption.

If you would like to support this channel, consider becoming a patron at   / geologyhub  .

Another way to support this channel is to make an order via our gemstone and geology related etsy store at http://prospectingarizona.etsy.com.

This channel's merch store is also on etsy at http://geologyhub.etsy.com.

Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institute. https://volcano.si.edu/

0:00 Lassen Peak Erupts
0:33 An Older Megaeruption
1:02 Extent of the Eruption
1:47 Why the Eruption Happened
2:40 Eruption Sequence
3:34 Location of Caldera
Google Earth imagery used in this video: ©Google & Data Providers

Thumbnail Photo Credit: ELG21, Pixabay, Pixabay License

Note: This video is protected under "fair use". If you see an image or video which is your own, or think referencing a scientific paper does not fall under this doctrine, contact me by email at [email protected] and I will remove / censor the content in question.