MALY SEMYACHIK (🇷🇺) & A glimpse at PHOTOGRAMMETRY

View to the W in a helicopter overflight of Maly Semyachik, with an old eroded cone of another volcano of this caldera in the background. (Img. via Twitter by “@ГК РФ(🇷🇺)в Женеве” Oct. 16, 2017)

Kamchatka is one of the most remote parts of the world with difficult access to most of its volcanoes. And yet, there are detailed maps available, and many of the volcanoes are researched well. Have you ever wondered how on earth volcanologists figure out the volume of a crater lake or the size of

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Nyiragongo and Nyamuragira Volcanoes, Congo

Satellite photo of adjoining volcanic fields, Goma and Lake Kivu. Photo courtesy Photovolcanica. http://www.photovolcanica.com/VolcanoInfo/Nyiragongo/Nyiragongo.html

AN IMMENSE BOILING POT: VOLCÁN RINCÓN de la VIEJA (CR)

Rincón de la Vieja Active Crater. The walls expose thick sequences of oxidized and hydrothermally altered pyroclastic deposits and light-colored lava flows. (© Bernhard Edmaier, via “Bilder von der Erde” [Images of the Earth])

Rincón de la Vieja is one of those volcanoes that don’t make headlines with fiery lava streams and end-of-world scenarios. Presently, the biggest news from it are about yet another phreatic explosion, and the most exciting photos show a pale steam plume fading away, at best with a bit of ash mixed in. Moreover, the videos of ensuing lahars we have recently seen show

The Ontong Java Plateau – Large Igneous Province

Google screen capture of Solomon Islands. Ontong Java atoll is the darker blue boot shaped island just right of the upper center of the capture. The Ontong Java Plateau (OJP) is the lighter blue shaded portion of the capture north of the Solomon Island arc.

VOLCÁN CHAITÉN (CL) and a Town in Distress

The Chaitén volcano in eruption, October 2008 (© Gerard Prins, via Wikimedia)

The Michoacán – Guanajuato Volcanic Field, Mexico

Paricutin volcano, lava flow and buried church. http://www.amusingplanet.com/2014/08/paricutin-volcano-that-grew-out-of.html

NISYROS of the Twelve Islands (Greece)

Nisyros, view into the caldera with Stefanos Crater. (© stupiduglyfool, via mapcarta.com)

How many of the millions of sunshine-hungry European travellers to Greece would have known that there is the attraction of a fuming active volcano in their favorite holiday destination? And I am not talking famous Santorini here, but a little island with only a few hundred residents in the far south-east of the country, near the Turkish main land.

The 2018 Eruption Sequence at Mayon, Philippines

Mayon in eruption Jan 23. Photo courtesy Philstar Global. http://www.philstar.com/headlines/2018/01/24/1780930/mayon-volcano-spreads-lava-3-kilometers-crater

A VOLCANO WITH A TRAPDOOR – SIERRA NEGRA CALDERA (Galápagos, EC)

Volcán Chico, cinder cone on the north-eastern rim of the caldera Sierra Negra (© Michael R Perry, via wikimedia).

Sierra Negra volcano in the Galápagos Islands has piqued our attention once again. Reports of renewed activity are getting more convincing by the month. Here we are again – as advertised – at a “second largest caldera” or, more often even “second largest crater” in the world”… NOT! It seems that everyone accepts Yellowstone with its

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