Unknown Unknowns

 

640px-Caldera_Mt_Tambora_Sumbawa_IndonesiaIf you time-traveled back to the spring of 1815 and asked anyone in Europe — or, for that matter, much of the rest of the world — what world-historical event was going on that would affect their lives over the next few years, almost everyone would have offered the same answer: Napoleon’s escape from Elba and attempt to reconstruct the French Empire. Each and every one of them would have been wrong.

What they should have been concerned with were the eruptions of Mt. Tambora in Indonesia, the biggest of which occurred 200 years ago this week. Tambora was one of the biggest volcanic eruptions in recorded history; quite possibly, the biggest. The explosion knocked the top mile off of the volcano and threw about 100 cubic kilometers of material into the atmosphere, about 24 times more than Mt. Helens would in its famous 1980 eruption (even the Krakatoa eruption a few decades later would be an order of magnitude less than Tambora). Estimates vary wildly, but low-ball figures estimate that at least 10,000 people died as a direct result of the explosion.

But this wasn’t a mere local news story. Through a combination of the explosion’s size, the height of the ash plume, and their source near the Earth’s equator, the eruption affected the entire world’s climate for the next three years. Again, estimates vary, but it’s likely that an additional 50,000 people were killed by famines and crop failures as far away as the United States, and twice that number more may have died from the typhus and cholera epidemics that followed. Nighttime temperatures in New England plummeted below freezing at least once in June, July, and August of 1816. Food prices surged globally, tens of thousands of farmers and peasants were turned into refugees in China, and the government of Switzerland was nearly overthrown by riots.

The amazing thing about all this is not simply that no one at the time of the eruption realized its significance, but that no one would know its significance until well into the 20th century. The effects could be seen, but no one put the pieces together (to give credit where due, Benjamin Franklin published a paper that conjectured — in all of a few sentences — that global climate changes and volcanism may be connected, the first time such an idea had every been put to paper. It was dismissed out of hand).

Very likely, there is something happening — of which we are wholly ignorant — that will affect our futures as much as some of the things we’re currently granting our attention. It could be a natural disaster (or a man-made one), a technological innovation that changes things dramatically, or the birth of a new religion. On the other hand, it could well be something we’re already concerned with, such as a nuclear war brought on by Iran’s race to get the bomb. We don’t know whether our concerns are prescient, naive, or unnecessarily pessimistic.

But we’ll find out.

Image Credit: “Caldera Mt Tambora Sumbawa Indonesia” by Jialiang Gao (peace-on-earth.org) – Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons.

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There are 32 comments.

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  1. Ricochet Contributor
    Ricochet
    @TitusTechera

    Majestyk:The trouble with multilayered political catastrophes such as the issue with the Dictators is that they are just as difficult to unwind as they are to construct – or even to predict that they would have been as large a problem as they were years in advance.

    Exactly why I’d like people to get the political basics seriously.

    A major asteroid strike (like Apophis) would have catastrophic effects for probably every person on the planet either directly or in a secondary fashion. I do think that this is something which is becoming possible for us to prevent and we should be thinking about how to stop something like that.

    I’m all for scientific study into that sort of thing, including on public money, but it’s not the big deal this year of this generation…

    If you look around and see that the Iranian Mullahs are getting a nuclear bomb you’d notice that they weren’t as much of a problem until they possessed technology which could mimic the effects of a natural disaster. Preventing them from achieving that ability is also within our power, but our current political leadership is either feckless, naive or unwilling to do something about it.

    Sure, which is why I’d like people to get the political basics seriously.

    • #31
  2. Devereaux Inactive
    Devereaux
    @Devereaux

    anonymous:

    Devereaux:So why were there not all these nasty electrical results of all the nuke air tests that were done back in the 50-60′s?

    With only a few exceptions, those were explosions in the atmosphere. An atmospheric explosion produces only a very weak EMP, which has negligible consequences compared to the other weapon effects.

    For a large-scale, high-intensity EMP, the bomb must be detonated outside the atmosphere, so that its gamma rays can produce free electrons which radiate the pulse over a wide area as described in #28. Only a few nuclear tests were ever done outside the atmosphere. In the Starfish Prime test of July 9th, 1962, a 1.4 megaton weapon was detonated 400 km above Johnston Island in the Pacific. It created a much larger EMP than had been expected, and in Hawaii, 1445 km from the detonation, caused 300 streetlights to fail, burglar alarms to go off, and damaged a microwave telephone link between islands. Three satellites in low Earth orbit failed shortly after the test and seven more failed in subsequent months due to a temporary radiation belt created by the detonation.

    It was this test which sparked serious research into the EMP consequences of nuclear detonations in space.

    It is worth recalling that there were no long high-tension power distribution lines within range of the Starfish Prime EMP, and that electronics in 1962 were more robust against EMP than those today.

    Thanks for the explanation.

    • #32
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