Do 40,000 volcanoes matter? In a word, Yes.

The world is watching one volcano in Bali, but it’s sobering to think there may be hundreds of others going off, and almost certainly ones we don’t even know about.

The article  Is the Bali volcano making us warmer or cooler? by William F Jasper, reminded me of Ian Plimer’s words about there being squillions of undersea volcanoes so I found the 2007 paper, by Hillier, that tried to count them.

Trying being the appropriate word. Volcanoes are biggish things, but when they are under one or two kilometers of water they are hard to hear, hard to see, and, by crikey, we know more about the moon than the bottom of the Marinara, and it’s only 11km “away”.

People are constantly discovering new volcanoes, like a 3,000m one off of Indonesia that no one realized was there til 2010. It turns out the second largest volcano in the solar system is apparently not on Io, but 1,000 miles east of Japan.

It’s the size of the British Isles, but who knew? A few months ago a team found 91 new volcanoes under Antarctica. (This is getting serious, someone should talk to the Minister of Lava!)

Not only can we not predict when volcanoes will erupt, we don’t even know how many there are

The scope of our ignorance on the sea floor is really something. There are 1,500 active volcanoes on land, but on the seafloor, we are still discovering them all the time.

At least 39,000 of them rise one kilometer off the sea floor, but there are suspicions there might be up to 3 million, holy moly.

The Hilliers paper estimates that 24,000 submarine volcanoes were not yet discovered in 2007. Wikimedia is trying to list them. Good luck.

Does hot magma leaking into the oceans that we haven’t measured and don’t know about, change the currents, the temperature, and eventually our weather?

If it’s a bit hotter at one end of a trench than the other, does the water flow alter? Has the big ball of magma got anything at all to do with ENSO/AMO long-term trends? Your guess is better than a Global Climate Model.

So here is the closest thing we have to kind of being “A Map”.

…Hilliers 2007

Is the Bali volcano making us warmer or cooler?

I don’t think there is any chance the Bali volcano will be warming the world. But undersea volcanoes are releasing a lot of greenhouse gases. Time to tax them?

William F Jasper

Many of the undersea volcanoes are regularly oozing molten lava, as well as CO2, methane, and other gases. In addition, there are untold thousands — perhaps millions — of undersea “vents” that are regularly discharging gases, oil, and tar. Last year researchers found hundreds of new vents along the west coast of the United States. “Scientists have found 500 seabed vents bubbling methane into the Pacific Ocean off the United States, roughly doubling the number of known U.S. seeps of the powerful greenhouse gas,” reported by Reuters on October 19, 2016.

“Methane naturally escapes from the seafloor in many places around the world and can stoke global warming if it reaches the atmosphere,” the Reuters article continued. “Worldwide, scientists are trying to see if rising ocean temperatures cause more leaks. ‘It appears that the entire coast off of Washington, Oregon, and California is a giant methane seep,’ Robert Ballard, who is famed for finding the wreck of the Titanic and has now discovered the 500 new seeps, said in a statement. ‘The discoveries double to about 1,000 the number of such vents now known to exist along the continental margins of the USA,’ the statement said.”

Supervolcanoes might happen more often than we thought:

As it happens, this week a new study came out showing The Next Big One may be sooner than we think. Though we have no idea when, but we used to think they were 45,000- 700,000 years apart.

But now some new researchers think the new best guess is somewhere from 5,000 – 48,000 years.  If the Big-One goes off, forget carbon, forget climate, forget a whole continent.

Jonathan Rougier, Professor of Statistical Science, said the best guess value is “17 thousand years.”

According to geological records, the two most recent super-eruptions were between 20 and 30 thousand years ago.

The good Prof is careful to keep politically correct priorities in order:

On that basis, Professor Rougier says there is little need to plan now for a super-eruption, especially with many other pressing issues to address, which will affect the current and the next generation of humans.

Nothing to see here.

Though if you like, you can check out this volcano map.

Read more at JoNova

Trackback from your site.

Comments (5)

  • Avatar



    AND to what extent does volcanism affect polar ice changes, seas levels, various gas emissions,? We don’t even have a clue. And the Climate change establishment could care less. OTOH, they’re absolutely certain that the most ridiculous and trivial human activities (translate as “non-politically correct” activities) have enormous impact on a changing climate. …Please keep a straight face.


  • Avatar

    Spurwing Plover


    I can still remember when Mt St Helens in the state of Washington eurupted back in may of 1980 and i live with in a 50 mile or more radius of Mt Shasta


  • Avatar



    40,000 volcanoes, kinda like 40,000 kettles.
    All you have to do is stare at them and they’ll never go off. There’s 40,000 jobs for environmentalists.


  • Avatar

    David Lewis


    I will again mention it is estimated by geophysicists that only three volcanic eruptions, Indonesia (1883), Alaska (1912) and Iceland (1947), spewed more carbon dioxide into the atmosphere than all of human activities in our entire history. Now, the climate activists are very willing to accept the IPCC climate model predictions, so they should also accept that the IPCC says once released it takes a thousand years to remove carbon dioxide from the atmosphere. If you buy what the IPCC says, that means over half of the increase in carbon dioxide since the beginning of the industrial revolution is from these three volcanoes.


  • Avatar

    Spurwing Plover


    Mt Lassen eurpted in 1915 over 100 years ago and some Euruptions changed the weather and long before there was any Cars or Air Condtioners


Leave a comment