Mount Adams is a stratovolcano located in the United States, standing at an elevation of 3,742 meters within a subduction zone and continental crust tectonic setting. According to the Smithsonian Global Volcanism Program, the volcano has a documented history comprising 15 confirmed eruptions.
The record of activity spans thousands of years, determined primarily through tephrochronology—a scientific method that uses layers of volcanic ash and tephra to date past events. Across the confirmed eruptions, the Volcanic Explosivity Index (VEI) values reach up to 2.0.
Eruption Timeline and Historical Record
The earliest recorded eruption in the official dataset dates back to 7050 BCE, with a start-year uncertainty of 1,000 years and a VEI of 2.0. Subsequent activity occurred across multiple millennia and centuries, including events identified on volcano flanks such as the NNE flank and the SSE flank.
The latest recorded eruption in the structured collection began around 950 CE with a VEI of 2.0. The official record documents 15 total confirmed eruptions spanning from the 71st century BCE through the 10th century CE.
Frequently asked questions
How many confirmed eruptions does Mount Adams have?
Mount Adams has 15 confirmed eruptions recorded in the official Smithsonian Global Volcanism Program database.
When did Mount Adams last erupt?
The earliest recorded eruption in the official dataset dates to 7050 BCE, and the latest recorded eruption occurred around 950 CE.
What type of volcano is Mount Adams?
Mount Adams is classified as a stratovolcano situated in a subduction zone and continental crust tectonic setting in the United States, standing at an elevation of 3,742 meters.
Sources and further context
Official datasets support the event-specific facts.