Lassen Volcanic Center, California

Skyline above timberline of the Lassen dome field.  Major domes visible.  Cinder Cone is in the foreground, the most recent feature.  Lassen Peak in the center background.  Other recent domes labeled.  Image courtesy Lassen Volcanic Center, USGS

Mount Martin and Alagogshak Volcanoes, Katmai, Alaska

Summit of Mount Martin showing active fumaroles and small acidic lake.  Image courtesy SR Wood, US NPS, Katmai

The Atka, Korovin, Kliuchef Volcanic Complex, Aleutians, Alaska

Greater Atka Volcano complex with the caldera, Korovin and Kliuchef labeled. Image courtesy Lu and Dzurisin, 2014, via Smithsonian GVP

El Estribo Volcanic Complex, Mexico

El Estribo (red marker) volcano.  Cinder cone topping the shield is just to the south of the marker.  Fault scarp / flank collapse scarp visible to the left and right of the marker.  Neighboring Patzcuaro is the settled area to the right.  Southern end of Patzcuaro Lake is visible at top.  Screen capture from Google maps

Indian Heaven Volcanic Field, Washington State, USA

Lemei Rock in Indian Heaven volcanic field.  Image courtesy Outdoor Project, Fall Color in Indian Heaven Wilderness, WA, Lisa Holmes, 2014

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.

Nevado de Toluca, Mexico

Nevado de Toluca from surrounding valley.  Image courtesy Ricardo Guaderrama Caraveo, via Medium.com, 2018

Recent Activity at Little Sitkin, Alaska

NASA Landsat image of Little Sitkin island. Image courtesy SJ Smith via AVO, 2001

Sept. 2006 Eruption of Fourpeaked Volcano, Alaska

Fourpeaked eruption Sept. 17, 2006. Mount Douglas is the larger volcano to the right. Note dual sources for eruptive plume. Photo taken by Lanny Simpson, Alaska High Mountain Images via AVO

Mono-Inyo Craters – the Most Recent Activity at Long Valley, CA

Annotated satellite image of Mono-Inyo Craters. Mammoth Mountain dome domplex is at the bottom of the image. Mono Lake is at the top. Long Valley is to the east (right) of Mammoth Mountain. Image courtesy Wikipedia Mono-Inyo Craters