Photo Friday: Restless Veniaminof Volcano

Veniaminof, a glacier-covered volcano on the Alaska Peninsula, has been erupting since early September. As of 4 October, the Alaska Volcano Observatory reports that seismic unrest continues at Veniaminof, which remains at code ORANGE/WATCH, with satellite data observing elevated surface temperatures. The volcano, which last erupted in 2013, is producing lava and minor ash emissions.

This Photo Friday, view images of Veniaminof’s recent unrest.

Photo of Veniaminof’s active vents and lava flow on 26 September 2018 (Source: Mark Laker USFWS).

 

Veniaminof in eruption, September 25, 2018. Two plumes are visible: the lower one due to the interaction of the lava flow with ice; the upper one from an active vent (Source: Mari Peterson/AVO).

 

ESA Sentinel-2 image of Veniaminof volcano and active lava flow on the south flank of the intracaldera cone on September 16, 2018 (Source: AVO/USGS).

 

Veniaminof in eruption, evening of September 18, 2018 (Source: Pearl Gransbury).

 

Veniaminof in eruption, September 2018 (Source: Zachary Finley/AVO).

 

Veniaminof in low-level eruption on September 5, 2018 (Source: Joe Timmreck and Alaska Central Express).

Roundup: Restless Volcano, Bolivian Andes, and Capelin

Restless Glacier-Covered Volcano on Alaska Peninsula

From Alaska Volcano Observatory: “Unrest continues at Veniaminof. Seismicity remains elevated with weak tremor, but levels have decreased since midweek. Webcam views of the volcano have been obscured by clouds. Cloudy satellite data over the past 24 hours show intermittent elevated surface temperatures. No significant ash emissions have been observed or reported.”

Read more about Veniaminof Volcano here.

Veniaminof Volcano is at current alert level WATCH and current aviation color code ORANGE (Source: Alaska Volcano Observatory).

 

Glacial Lake Outburst Floods in the Bolivian Andes

From Natural Hazards: “Previous research has identified three potentially dangerous glacial lakes in the Bolivian Andes, but no attempt has yet been made to model GLOF inundation downstream from these lakes… We suggest that Laguna Arkhata and Pelechuco lake represent the greatest risk due to the higher numbers of people who live in the potential flow paths, and hence, these two glacial lakes should be a priority for risk managers.”

Read more about GLOF risk in the Bolivian Andes here.

Location of glaciers and potentially dangerous glacial lakes in the Bolivian Andes, as well as the 2009 Keara GLOF event (Source: Natural Hazards).

 

Feeding Ecology of Capelin in a Greenland Fjord

From Polar Biology: “Capelin (Mallotus villosus) is an important trophic node in many Arctic and sub-Arctic ecosystems. In Godthåbsfjord, West Greenland, the zooplankton community has been shown to change significantly from the inner part of the fjord, which is impacted by several glaciers to the shelf outside the fjord. To what extent this gradient in zooplankton composition influences capelin diet during their summer feeding in the fjord is yet unknown.”

Learn more about the feeding ecology of Capelin here.

An illustration of a Capelin (Source: Creative Commons).