|Active and Potentially Active Volcanoes in Oregon|
|Volcano||Eruption type(s)||Number of eruptions in past 200 years||Latest activity (in years before present or year(s) A.D.)||Remarks|
|Mount Hood||Ash, dome||2?||1865||Occasional seismic swarms|
|Mount Jefferson||Ash, lava||0||More than 50,000 years ago||Debris flows in 1934, 1955; young basaltic flows in nearby area|
|Three Sisters||Ash, lava||0||950?||Debris flows in this century|
|Crater Lake||Lava, ash, dome||0||4,000 years ago||Largest known eruption from Cascade Range volcano. Catastrophic, caldera-forming eruption 7,000 years ago; post-caldera lava and domes|
|Newberry Crater||Ash, lava||0||600||Latest eruption was obsidian flow|
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