Pago and the Witori Caldera, PNG

Active Pago cone in Witori caldera from the N in Sept 2002 during the 2002 eruptive sequence.  Directional blast left vegetation alone close to the crater rim while mowing trees down to the right of the image.  Photo courtesy USGS – VDAP via Smithsonian GVP

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Dotsero Volcanic Complex, Colorado, USA

Remaining maar of Dotsero volcanic complex.  Image courtesy Our Community Nov, 2019

Dotsero is the most recent of four quaternary volcanic centers in NW Colorado.  The locations and relative ages are: Dotsero (4,150 years ago), Willow Peak (undated), McCoy (0.64 Ma) and Triangle Peak (1.98 – 1.87 Ma).  Triangle Peak was the only one of these not monogenetic as it produced at least 11 lava flows before activity stopped.  Willow Peak is described as a young cinder cone with a narrow lava flow extending 6 – 7 km E.

Why is Akutan the Eighth Most Dangerous Volcano in the US?

Akutan Volcano looking west. Village of Akutan on the north side of the bay in the foreground. Image courtesy Vlad Karpayev, AVO, June 2018. https://avo.alaska.edu/images/image.php?id=117501

Recent Volcanic Activity in SW Utah

Simplified map of volcanic fields in the western US that have been active during the Quaternary. http://geosphere.geoscienceworld.org/content/13/2/391/figures-only

Recent Volcanic Activity in Northern Arizona

Lava Flow next to the Colorado River, Grand Canyon. https://answersingenesis.org/blogs/georgia-purdom/2014/06/07/the-grand-canyon-and-my-comfort-zone/

Volcanoes of Peru 2: Nevado Sabancaya

Photo: IGP