The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
North Sister volcano, along with Middle and South Sister part of the Three Sisters Group in central Oregon Cascades. The group forms a prominent landmark in the Central Oregon Cascades.
North Sister is the glacially eroded remnant of a andesitic-dacitic stratovolcano, exposing the volcano's central plug.
Middle Sister volcano, also over 3000 m in elevation, is located only 2 km to the south. It is basaltic-to-rhyolitic in composition and less eroded than North Sister, but there are no known eruptions in the past 10,000 years.
Earthquake News: News in this category include: latest and archived earthquake lists & maps, reports, largest recent earthquakes, quakes near volcanoes, significant quakes etc - news and articles about earthquakes world-wide.
Volcano Calendar 2015: We're proud to present our new volcano calendar 2015: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.
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