Breached caldera and active cone at Galeras looking to the south. Image courtesy LeChaudron de Vulcain, Oct 2019
America C & S
Posts about volcanoes in Central and South America.
An effusive eruption began on La Soufriere volcano on St Vincent (St Vincent and the Grenadines) island in the eastern Caribbean Sea in Dec. Note that this is currently an ongoing dome building eruption.
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Volcan Cerro Quemado with most recent lava flow in the foreground. Image courtesy Guatemala.com
Boat cruising in the Amalia fjord to obtain ground cores in search of tephra from the Reclus volcano, to prove a recent activity which could be related to the dynamics of the Amalia glacier. 07/2014 (© Godiespi, via Wikimedia)
Seeing that SERNAGEOMIN recently has included the Reclus volcano into group III of the assessment of their volcanoes, according to hazards they may pose to the population, I had another go at finding out more about it. Continue Reading
Volcan Toliman (center right), Atitlan (far right) from Volcan San Pedro (foreground). Note cinder cone on northern flank of Toliman. Lake Atitlan in the foreground and to the left of the photo. Heavily vegetated lava flows on the near flanks and north facing flanks of Toliman. Village in the center foreground. North is to the left of the photo. Lake Atitlan fills about half the Atitlan III caldera. Image courtesy DIY Travel HQ
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View from Los Aguajes in the east of Volcán Ceboruco. (© Juan Castillo Campos, via mapio.net)
As so often, and generally without intention, I have hit upon yet another volcano that has all the trimmings of a beast but seems not really to be recognised as such. Up to a few years ago there have been very few studies to find out about the seismological and structural properties of the volcano. Volcán Ceboruco is considered among the five volcanoes with the highest risk in Mexico, and the second most active after Colima volcano in the western Trans-Mexican Volcanic Belt. Yet, scientists had to point out, in a 2016 study, “that every effort should be made to monitor its seismic activity”. Continue Reading
Laguna del Maule Volcanic Complex. Image courtesy Sernageomin
Tecuamburro volcano: View across Laguna Ixpaco towards the S, with the lava dome Cerro Peña Blanca in the background. (© Oscar Villarreal, via former Panoramio)
About everybody knows that Guatemala has three very active volcanoes: Fuego, Pacaya and Santa Maria’s dome Santiaguito – but did you know that a staggering 324 eruptive centers have been identified in that country?
Update, Aug. 2019:
In the five years since this was first posted, science continues to grind away, answering a few questions which in turn create a bunch more questions. The Baillie tree ring / ice core team is increasingly of the opinion that the 535 – 540 AD global cooldown was caused by huge volcanic eruptions, at least two of them bracketing the period. A team including Robert A Dull published a paper August 16 entitled “Radiocarbon and geologic evidence reveal ilopango volcano as the source of the colossal ‘mystery’ eruption of 539/40 CE” that appears to nicely define the most recent end of that bracket.
View from Green Mountain across volcanic cinder cones, with Sisters Peak towering over the little town of Two Boats. (© BBC)
“The 7th June anno 1656. Att evening wee arrived att Ascention and anchored on the NW side of the iland. On our rightt hand was a faire sandy bay Continue Reading
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