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Sigmetnow

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Volcanoes
« on: September 24, 2017, 09:51:38 PM »
A major eruption of Mount Agung in [Bali] Indonesia could happen at any time. This volcano has potential to temporarily cool the global climate.
https://twitter.com/EricHolthaus/status/911515451376771072

Bali’s Mount Agung threatens to erupt for the first time in more than 50 years
https://theconversation.com/balis-mount-agung-threatens-to-erupt-for-the-first-time-in-more-than-50-years-84356

Mount Agung in Bali at highest alert level 4. These are the alert levels for volcanoes in Indonesia. @USConGenSby @usaidindonesia
https://twitter.com/usembassyjkt/status/911600452826939392

More tremors as Mt Agung threatens to erupt
http://www.perthnow.com.au/news/western-australia/more-tremors-as-mt-agung-threatens-to-erupt/news-story/070c8b9deb0ab62828ea7f77a2170161
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Sigmetnow

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Re: Volcanoes
« Reply #1 on: September 24, 2017, 11:54:15 PM »
"Most of the direct hazard comes from pyroclastic flows (hot torrents of volcanic debris) in the yellow and red regions while mudflows could move through the river valleys leading from Agung (green)."

Indonesia’s Agung Raised to Highest Alert for Eruption
http://blogs.discovermagazine.com/rockyplanet/2017/09/24/indonesias-agung-raised-to-highest-alert-for-eruption/
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Avalonian

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Re: Volcanoes
« Reply #2 on: September 25, 2017, 02:25:16 AM »
This one is definitely worth keeping a close eye on, since it has the potential to go caldera... it's a tall edifice in an area with a lot of calderas, which hasn't yet collapsed. Its habit of having large (VEI-5ish) eruptions at extended intervals is worrisome, as it allows large magma chambers to build. Tambora was very similar before it went pop in 1815 - the largest eruption in modern history, which resulted in the 'year without a summer'.

Having said that, it's only a potential, and volcanoes do whatever they feel like (usually involving confounding geologists). A few thousand years here or there before the caldera collapse is nothing. So it could do something spectacular... but the odds are on another VEI-5 type eruption, with major local inconvenience (usually extremely well handled by the Indonesian authorities) but little global effect. So yes, definitely needs watching!

Sigmetnow

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Re: Volcanoes
« Reply #3 on: October 12, 2017, 08:16:45 PM »
Yellowstone supervolcano may blow sooner than thought — and could wipe out life on the planet
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Scientists working in and around Yellowstone National Park say that the supervolcano sitting under the tourist attraction may blow sooner than thought, an eruption that could wipe out life on the planet.

According to National Geographic, the researchers, from Arizona State University, analyzed minerals in fossilized ash from the most recent mega-eruption and found changes in temperature and composition that had only taken a few decades. Until now, the magazine reported, geologists had thought it would take centuries for the supervolcano to make the transition. ...
https://amp.usatoday.com/story/757337001/
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Sigmetnow

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Re: Volcanoes
« Reply #4 on: October 13, 2017, 02:31:17 AM »
Just some amazing volcano eruption footage.  Eruption at Kirishima volcano in Japan.
Video at the link:  https://twitter.com/EarthUncutTV/status/918444023869607936
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Alexander555

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Re: Volcanoes
« Reply #5 on: November 01, 2017, 04:40:14 PM »
It's already a few dayes old, but what do you think of it.
http://www.thebigwobble.org/2017/09/balis-imminent-mount-agung-eruption.html

gerontocrat

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Re: Volcanoes
« Reply #6 on: November 01, 2017, 05:21:23 PM »
It's already a few dayes old, but what do you think of it.
http://www.thebigwobble.org/2017/09/balis-imminent-mount-agung-eruption.html
My understanding is that the effect of individual volcanic eruptions is temporary, even if very disruptive for one (?) two (?) three (?) ten (?) years. When Mount St Helens erupted the effect was measurable. My memory tells me that scientists tested their climate models for the effect of the emissions and the models performed very well.
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Tor Bejnar

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Re: Volcanoes
« Reply #7 on: November 01, 2017, 05:40:36 PM »
Per a comment on the Volcano Café blog (date stamp:  29/10/2017 at 13:15)
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Agung alert level has been dropped to Orange (III/Siaga).
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Daniel B.

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Re: Volcanoes
« Reply #8 on: November 02, 2017, 12:48:37 PM »
It's already a few dayes old, but what do you think of it.
http://www.thebigwobble.org/2017/09/balis-imminent-mount-agung-eruption.html
My understanding is that the effect of individual volcanic eruptions is temporary, even if very disruptive for one (?) two (?) three (?) ten (?) years. When Mount St Helens erupted the effect was measurable. My memory tells me that scientists tested their climate models for the effect of the emissions and the models performed very well.

Short of a super volcano eruption (which are extremely rare and devastating), you are correct.  When Pinatubo erupted in 1991, global temperature dropped ~0.6C over the next year.  This effect lasted about two years, before the aerosols started to be filter out of the stratosphere.  The Tambora eruption of 1815 was much stronger, resulting in a temperature drop of up to 3C, which consequently decreased rainfall by ~4%.  This resulted in widespread crop failures and mass starvation.  The worst was felt within a year, with temperatures starting to recover in the second year.

Alexander555

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Re: Volcanoes
« Reply #9 on: November 26, 2017, 12:50:20 PM »
Some people predict a higher number of heavy earthquakes in 2018. Because of a slightly slower rotation of the earth. And 2018 is not far away, so soon we know if that's right or not. But what would be the correlation between these earthquakes and vulcano activity ? I can imagine that it's not going to stay unnoticed if it's right

Alexander555

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Sigmetnow

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Re: Volcanoes
« Reply #11 on: November 26, 2017, 05:23:52 PM »
Still active.

Bali's Mount Agung erupts; ash clouds force closure of Lombok airport
Quote
KARANGASEM, Indonesia -- A volcano on the Indonesian island of Bali has rumbled to life with eruptions that dusted nearby resorts and villages with ash and forced the closure of the small international airport on neighboring Lombok island as towering gray plumes drifted east.

Mount Agung erupted on Saturday evening and three times early Sunday, lighting its cone with an orange glow and sending ash 13,000 feet into the atmosphere. It is still gushing and the ash clouds have forced the closure of Lombok island's airport until at least 6 a.m. Monday, an official at the airport said. ...
https://www.cbsnews.com/news/bali-volcano-mount-agung-erupts-volcano-lombok-airport-indonesia/
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Niall Dollard

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Re: Volcanoes
« Reply #12 on: November 26, 2017, 06:20:00 PM »
Öraefajökull in Iceland is also a big concern. It is the second largest volcano in Europe and the one that Icelanders especially to not wish to see erupt.

A good summary here:

http://www.volcanocafe.org/oraefajokull-a-challenge-for-volcanology/

Extract: The reason for it being so dangerous is that the magma type it erupt is highly prone to be explosive, and we do know that it is full of volatile gases and that it is hotter than usual. This is a bad recipe, nobody likes turbo-charged rhyolite.

The second problem is the lack of knowledge and historical records of how the volcano behave prior to an eruption. The small few things we do know indicates that the current behaviour is how the volcano behaves prior to an eruption, but that there can be decades long waiting time from reactivation to the final eruption.



Sigmetnow

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Re: Volcanoes
« Reply #13 on: November 28, 2017, 12:39:37 AM »
Mount Agung is erupting in Bali. If it is similar to the 1963 eruption, the climate could cool by 0.1-0.2 C according to a simple extrapolation by @hausfath. Though noticeable, it'd be a small speed bump compared to the takeoff ramp of global warming  https://www.carbonbrief.org/analysis-how-could-agung-volcano-bali-affect-global-temperature
   https://twitter.com/simondonner/status/935286529701711874


A volcano is erupting in Indonesia that could have worldwide climate implications.
And, you can watch it happen live on YouTube.
Earth, 2017.
http://grist.org/briefly/an-erupting-indonesian-volcano-may-alter-global-climate/

You can follow  @janinekrippner & @eruptionsblog on Twitter for the latest updates on the eruption of Mount Agung in English.
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Sigmetnow

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Re: Volcanoes
« Reply #14 on: November 28, 2017, 12:46:14 AM »
You can clearly see the two plumes here- the steam-rich plume and the ash-rich plume. This indicates two vents within the crater. This ( 2 vents) does happen at other volcanoes around the world too. #Agung #Bali
https://twitter.com/janinekrippner/status/935287688164528128

    this video taken from @madenagi Instagram. Timelapse mode. posted more less from 10 hrs ago. stay safe everyone
https://twitter.com/celynn88/status/935278957905158144

Photo below; video at the link.
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Alexander555

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Re: Volcanoes
« Reply #15 on: November 29, 2017, 08:33:14 PM »

Sigmetnow

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Re: Volcanoes
« Reply #16 on: December 04, 2017, 12:49:48 AM »
The appearance of #Agung this morning. Medium pressure crater Steam/gas plume observed white & gray with a thin intensity and height 1000 m above the crater. Continuous tremor with an amplitude of 1-2 mm. Awas Status. Ngurah Rai Airport and Lombok Airports are normal.
https://twitter.com/janinekrippner/status/937464774295805952
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Alexander555

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Paddy

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Re: Volcanoes
« Reply #18 on: December 07, 2017, 12:58:56 AM »
If this eruption is significant enough to cause such a dip in global temperatures, it'll also be lethal for quite a few people in the local area because of the worsening air pollution.  Plus it will also emit a lot of CO2, which will stick around a lot longer than the cooling sulfates.

Sigmetnow

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Re: Volcanoes
« Reply #19 on: December 18, 2017, 03:57:13 AM »
Agung update:

Effusive/slow lava extrusion is still occurring, occasionally followed by short-duration ash plumes. Medium pressure ash plumes observed up to 500-1000 m, leaning towards the NW and E. Incandescence from lava inside the crater visible at night.
     https://twitter.com/janinekrippner/status/942492610270318597
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johnm33

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Re: Volcanoes
« Reply #20 on: December 18, 2017, 11:04:43 AM »
" it'll also be lethal for quite a few people in the local area because of the worsening air pollution" is there any real time monitoring/analysis of the gas/ejecta?

Sigmetnow

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Re: Volcanoes
« Reply #21 on: December 20, 2017, 06:44:46 PM »
Huge eruption of volcano Bezymianny today #Kamchatka #Russia .Photos from VK social media.
https://twitter.com/WeatherSarov/status/943377052497010688
Photo below; more at the link.

Volcanic eruption at #Bezymianny on #Kamchatka Peninsula - advisories from Tokyo VAAC have max ash height at 50,000 feet (15.2 km). #Himawari8 volcanic ash height product http://go.wisc.edu/dn55d3
https://twitter.com/CIMSS_Satellite/status/943505603573493760
Satellite image below.
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Sigmetnow

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Re: Volcanoes
« Reply #22 on: January 03, 2018, 05:40:49 PM »
Mount St Helens Is Rumbling Again With 40 Earthquakes Since New Years Day
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Since New Years Day Mount St. Helens has experienced 40 earthquakes within its vicinity as tremors continue every few hours. The most powerful earthquake was a magnitude 3.9 that occurred around midnight west coast time about 5 miles from Mount St. Helens and 23 miles from the town of Morton.

The 3.9 magnitude earthquake was felt in Portland but there were no reported injuries or damage. Since that earthquake there have been 16 more earthquakes, averaging about every half hour with magnitudes from 0.6 to 2.6.

It is common to experience swarms of earthquakes at Mount St. Helens. While it is certainly not a sign of an impending eruption, the earthquakes are a result of an active volcanic system.

Mount St. Helens is most commonly known for its major eruption in 1980, the deadliest and most economically damaging volcanic event in the history of the United States. The stratovolcano is situated just 96 miles from Seattle and 50 miles from Portland, making an eruption especially dangerous.
...
https://www.forbes.com/sites/trevornace/2018/01/03/mount-st-helens-is-rumbling-again-with-40-earthquakes-since-new-years-day/
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Sigmetnow

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Re: Volcanoes
« Reply #23 on: January 03, 2018, 05:46:26 PM »
And for what it’s worth, I’ll add this link.  The slight slowing of the earth’s rotation is thought to be a predictor of a period of greater seismic activity — which would also activate volcanoes....

We could see twice as many big earthquakes this year, scientists warn — because the equator has shrunk
http://www.businessinsider.com/earthquakes-global-seismic-hazard-slow-earth-rotation-2017-11

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Sigmetnow

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Re: Volcanoes
« Reply #24 on: January 12, 2018, 08:17:43 PM »
The activity of #Agung is still high. Eruption on 11 January.
https://twitter.com/janinekrippner/status/951618434986594304
Brief video at the link.
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Alexander555

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Sigmetnow

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Re: Volcanoes
« Reply #26 on: February 11, 2018, 07:03:10 PM »
“The status of #Agung has been lowered from level 4 to 3. The exclusion zone has been reduced to 4 km. Evacuees can go home. ”
https://twitter.com/janinekrippner/status/962313516517679105

“This is a big deal. Evacuees can go home.This is a dangerous volcano & it was a necessary precaution. Can you imagine living in camps away from home for months? Women have given birth in those camps. I feel relieved for them. #Agung ”
https://twitter.com/janinekrippner/status/962324308457656320
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harpy

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Re: Volcanoes
« Reply #27 on: February 18, 2018, 06:49:33 PM »
At this point only a massive volcanic eruption such as this one could reverse the exponential climate change emergency that is taking place - if only temporarily.

Is it possible to purposely cause the eruption of a volcano like Agung via nuclear weapons or some other form of human intervention?

I'm not suggesting they do something like that - I'm just wondering if it's theoretically possible.

John Batteen

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Re: Volcanoes
« Reply #28 on: February 19, 2018, 06:28:11 AM »
Well, long-term, volcanoes actually warm the planet because the CO2 they emit persists much longer than the aerosols. So I don't think that would be a good idea.

Sleepy

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Re: Volcanoes
« Reply #29 on: February 19, 2018, 07:51:51 AM »
Is it possible to purposely cause the eruption of a volcano like Agung via nuclear weapons or some other form of human intervention?

I'm not suggesting they do something like that - I'm just wondering if it's theoretically possible.
No, that's Hollywood. Here's an old article by Erik Klemetti with a more elaborate answer:
https://www.wired.com/2012/04/could-people-trigger-a-volcanic-eruption-on-purpose/
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be cause

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Re: Volcanoes
« Reply #30 on: February 19, 2018, 12:46:43 PM »
perhaps dropping icebergs into active volcanoes ? :)
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Sigmetnow

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Re: Volcanoes
« Reply #31 on: February 19, 2018, 02:34:27 PM »
North Sumatra, Indonesia.

“This video gives me chills. Those poor kids.
The #Sinabung eruption today produced an ash plume and hot (600-800 degrees C) pyroclastic flows that race down the slopes. A red exclusion zone is in place on the volcano and has been for years now.”
https://twitter.com/janinekrippner/status/965578332405469184
Video at the link.

“Elementary children shouting & afraid to see the powerful eruption of #Sinabung this morning. Pyroclastic flows with temperatures of 600-800 degrees C rapidly descend the slopes to 4.9 km away. Sinabung has been near-constantly active since Sept. 2013.”
https://mobile.twitter.com/janinekrippner/status/965578332405469184
Photo below.
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Sigmetnow

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Re: Volcanoes
« Reply #32 on: February 19, 2018, 07:09:44 PM »
“Incredible photos of the #Sinabung eruption today (19.2.18) by photographer Endro Lewa. These photos show the rapid-moving and scorching-hot pyroclastic flow & the vertical ash plume. ...”
https://mobile.twitter.com/janinekrippner/status/965637345457459207
Photo below.  More photos and discussion at the link.
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Niall Dollard

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Re: Volcanoes
« Reply #33 on: February 19, 2018, 10:42:39 PM »
Worldview image today of Northern Sumatra

Sigmetnow

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Re: Volcanoes
« Reply #34 on: April 15, 2018, 01:45:50 AM »
Ambae, Vanuatu: “All crops and trees are destroyed by the ash fall. There is no food. All water storage is destroyed by the sand and acid rain. There is no water."
https://twitter.com/janinekrippner/status/985273897988820995
Photos and article at the link.

http://dailypost.vu/news/ash-fall-destruction-on-north-ambae/article_164275d9-86a0-5a39-8a2e-c97ddc3546a0.html
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