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Old 31-12-2020, 03:38   #1
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Volcano Alerts

Eastern Caribbean on alert due to rare volcanic activity
Alerts issued in Martinique and St. Vincent and the Grenadines.
The most recent warning was issued late Tuesday for La Soufriere volcano in St. Vincent and the Grenadines, a chain of islands home to more than 100,000 people. Officials reported tremors, strong gas emissions, formation of a new volcanic dome and changes to its crater lake.
La Soufriere, located near the northern tip of the main island of St. Vincent, last erupted in 1979, and a previous eruption in 1902 killed some 1,600 people. That occurred shortly before Martinique's Mt. Pelee erupted and destroyed the town of Saint-Pierre, killing more than 30,000 people.
Mt. Pelee too is now active once again. In early December, officials in the French Caribbean territory issued a yellow alert due to seismic activity under the mountain. It was the first alert of its kind issued since the volcano last erupted in 1932
Klemetti said the most active volcano in recent years in the eastern Caribbean has been Soufriere Hills in Montserrat, which has erupted continuously since 1995, destroying the capital of Plymouth and killing at least 19 people in 1997.
Seventeen of the eastern Caribbean's 19 live volcanoes are located on 11 islands, with the remaining two are underwater near the island of Grenada, including one called Kick `Em Jenny that has been active in recent years.
https://www.cbc.ca/news/technology/c...noes-1.5857592


Soufriere St. Vincent - Saint Vincent and the Grenadines
Most Recent Weekly Report: 23 December-29 December 2020

https://volcano.si.edu/volcano.cfm?vn=360150



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Old 31-12-2020, 05:09   #2
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Re: Volcano Alerts

Fist worse hurricane season in years.

Then Covid.

Now volcanoes gone wild.

Much sympathy and love for the people’s of the Caribbean!
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Old 31-12-2020, 07:10   #3
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Re: Volcano Alerts

Only periperally related:

We sailed back and forth from the BVIs to Antigua for the Rolex Racing Series (before the 1995+ erruptions) keeping well off of Monserrat because, well - first, we were only passing by, but especially because of the extensive "active volcano" warnings broadcast to all mariners.

The cool part was sailing by at night and despite our distance off, the whole top of the mountain seemed to be glowing due to the active lava flow. It was especially visible at night; I feel like we were lucky to see it.

Thanks for the heads-up, Gord!

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Old 31-12-2020, 07:37   #4
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Re: Volcano Alerts

Wee anchored in Monserrat not far the volcano which was still quite active. Quite spectacular seeing all the ash blowing in the general direction of Central America. Next morning we passed to windward of the volcano and you could see the pyroclastic flow moving towards the ocean. Several months later we were in the Saintes and woke up one morning to a coating of ash on the boat. During the night a major part of dome had exploded. The eruption was so violent that the ask had passed through the trade winds and into a jet stream much higher which pushed the cloud eastward. Good news is that volcanic ash is very easy to clean up, it is like tiny pieces of rock rather than mud.

There is an undersea volcano called Kick 'Em Jenny just NW of Grenada. We had a friend named Jenny visiting with us but resisted the urge to get too close.
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Old 09-04-2021, 05:17   #5
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Re: Volcano Alerts

La Soufrière volcano on St. Vincent
Authorities on the eastern Caribbean island of St. Vincent said, Thursday, they believe La Soufrière volcano is in danger of erupting, and have ordered mandatory evacuations.

See ➥ https://twitter.com/i/status/1380279820928552960
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Old 09-04-2021, 05:30   #6
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Re: Volcano Alerts

I have anchored in Chateaubelair a number of times, and had beers and conversations with Fitzmo, a local fixture. He had stories of when surviving the 79 eruption. I hope he and all the other residents are okay.
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Old 09-04-2021, 10:38   #7
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Re: Volcano Alerts

And it has erupted!
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Old 09-04-2021, 10:50   #8
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Re: Volcano Alerts

Quote:
Originally Posted by Belezar View Post
And it has erupted!

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More ➥ https://www.facebook.com/hashtag/las...?fref=mentions

Just before 09:00 on Friday (13:00 GMT), seismologists from the University of the West Indies, confirmed that an "explosive eruption" was under way.
Nemo said that the ash plume had reached 20,000ft and was drifting eastwards into the Atlantic Ocean.
There were no immediate reports of casualties.
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Old 09-04-2021, 11:15   #9
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Re: Volcano Alerts


Photograph of the crater of La Soufriere Volcano, St. Vincent showing the 1971-72 lava dome.
Image Credit: THE UNIVERSITY OF THE WEST INDIES, SEISMIC RESEARCH UNIT ➥ The University of the West Indies Seismic Research Centre

A lava dome was emplaced in the summit crater in 1971, during a strictly effusive eruption, forming an island in a lake, that filled the crater, prior to an eruption in 1979. The lake was then largely ejected, during a series of explosive eruptions, and the dome was replaced with another.

It is a stratovolcano with a crater lake. Violent eruption occurred in 1718, 1812, and 1902. The 1902 eruption killed 1,600 people.
There were also eruptions in 1971-1972 and 1979.
The 1979 eruption started with less than 24 hours of precursor activity. The first episode lasted less than two weeks. It was vulcanian in character and sent steam and tephra as high as 12 miles (20 km). The second episode consisted of the quiet extrusion of a basaltic andesite lava dome. People were successfully evacuated and there were no fatalities.
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Old 10-04-2021, 07:58   #10
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Re: Volcano Alerts

Any cruisers in the area of St. Vincent, specifically the island of Canouan, who might be able assist in the evacuation of my sister and her girlfriend? Stuck on the island, the airport is closed. Only the big island is being evacuated, but the ash is falling where she is, some 40 miles south.
Both are Covid negative, both are willing to work on the boat and are willing to pay their way.
Please contact me if you know anyone who might be able to help.
Best to call my desk at Defender: 800-628-8225 Ext.100
Thank you,
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Old 11-04-2021, 03:14   #11
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Re: Volcano Alerts

Quote:
Originally Posted by Stephan View Post
Any cruisers in the area of St. Vincent, specifically the island of Canouan, who might be able assist in the evacuation of my sister and her girlfriend? Stuck on the island, the airport is closed. Only the big island is being evacuated, but the ash is falling where she is, some 40 miles south.
Both are Covid negative, both are willing to work on the boat and are willing to pay their way.
Please contact me if you know anyone who might be able to help.
Best to call my desk at Defender: 800-628-8225 Ext.100
Thank you,
Stephan
Bump.


Ash-covered St. Vincent in Pictures
https://www.aljazeera.com/gallery/20...anic-eruptions

More ➥ https://www.aljazeera.com/news/2021/...s-help-offered
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Old 11-04-2021, 03:19   #12
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Re: Volcano Alerts

For those in the zone they should watch:


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Old 12-04-2021, 05:27   #13
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Re: Volcano Alerts

Volcanoes can impact climate change.

During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere. Injected ash falls rapidly from the stratosphere -- most of it is removed within several days to weeks -- and has little impact on climate change. But volcanic gases like sulfur dioxide can cause global cooling, while volcanic carbon dioxide, a greenhouse gas, has the potential to promote global warming, but carbon dioxide released in contemporary volcanic eruptions, has never caused detectable global warming of the atmosphere.

However, the most significant climate impacts, from volcanic injections into the stratosphere, come from the conversion of sulfur dioxide to sulfuric acid, which condenses rapidly in the stratosphere, to form fine sulfate aerosols. The aerosols increase the reflection of radiation from the Sun, back into space, cooling the Earth's lower atmosphere or troposphere.

“What the St. Vincent volcano's eruption could mean for the atmosphere”
“... It's all to do with sulfur dioxide, one output from the volcano (in fact, the volcano's name, 'La Soufriere,' is a reference to sulfur). Depending on how long the eruption goes on, and how much sulfur dioxide is emitted, and whether the ash cloud reaches the stratosphere, it may actually induce a global cooling effect for a period ...”
https://www.theweathernetwork.com/sy...or-the-climate


“Sulfur dioxide initiates global climate change in four ways”
~ by Peter L.Ward
https://www.sciencedirect.com/scienc...40609009000169
https://www.researchgate.net/publica...e_in_four_ways
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