Krakatoa volcano stirs to life again

The volcanic island of Krakatau (previously called Krakatoa) is situated in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung. The name is also used for the surrounding island group comprising the remnants of a much larger island of three volcanic peaks which was obliterated in a cataclysmic 1883 eruption.

In 1927, a new island, Anak Krakatau, or “Child of Krakatoa”, emerged from the caldera formed in 1883 and is the current location of eruptive activity.

In the NASA photos below, you can see some stunning images of the volcano as it’s been stirring to life again

Activity at Krakatau

65 thoughts on “Krakatoa volcano stirs to life again

  1. A triple whammy if this goes off, Katla goes off and we hit a new solar minimum. Too bad all the excess CO2 we’ve been able to add into the atmosphere, plus that emitted by the volcanoes, won’t help by more than a few tenths of a degree.

      • On the beaches of Anyer and Carita on the western tip of Java there’s plenty of pumice stones from Anak Krakatau.

      • “Adam Gallon September 25, 2018 at 1:08 am

        It isn’t going to go off.
        Anak’s been rumbling away for years,

        Human years, or geological years. When someone says an active volcano isn’t going to go off, in a human timeframe, should step back and ponder those words.

      • There was a time once when Krakatoa had been rumbling away for years. That didn’t stop the explosion then. Curious it would for certain now.

        • Krakatau’s Plinian eruption of August 1883, started in May 1883. The volcano had been dormant since c 1681.
          Anak Krakatau’s been continually active since 1994.
          The material it’s erupted recently, isn’t associated with that of a Plinian eruption.

          • Fair enough, Adam. However, Mt. St. Helens was bulk composition andesite and, due to the sliding-off of a roof on a bulging, near-surface magma intrusion, the exsolution of volatiles produced rapid increase in the pressure and rapid, (dramatic?) expansion of the magma producing a pyroclastic eruption of a type not normally associated with andesitic volcanoes. Sure, Plinian eruptions are felsic pyroclastic events, but if you were a tourist on the flank of Mt. St. Helens when it blew the difference probably would not be appreciated.

      • Not for a while anyway
        It needs to get a bit bigger, form a caldera [which is explosive enough], settle down for a while and then have the caldera collapse

    • If the solar minimum continues, does that not mean temperatures in the upper latitudes decline, causing the population to increase their use of fossil fuels to keep warm? Which in turn brings more CO2 to the atmosphere and therefore causes more global warming? Would someone please check the thermostat.

  2. Anak Krakatau has been growing steadily and is now getting on to about a thousand feet in height but is likely a few hundred years or so from a repeat of its little misbehaviour of 1883 – hopefully.
    The Smithsonian runs an excellent volcano watch website with lots of pretty pictures of volcanoes which is useful for keeping up to date on current eruptions and rumblings – worth a look.

  3. “Child of Krakatoa” … like father, like son .. apple doesn’t fall far from the tree .. a chip off the old block

  4. Records are sketchy, but there is evidence of one, possibly two, catastrophic explosion of Krakatoa before the historical one of 1883, spaced a few hundred years apart.

  5. All those years hearing references to “Krakatoa, east of Java” as the worst quake ever. Hopefully nota repeat.

        • yes. the powers that be in hollywood intentionally mis-named the movie, since “east” sounds so much more mysterious and exotic.

        • I believe the film got absolutely slated by critics in the USA but in the U.K. was/is very popular cult movie precisely because of its absurdity, which extended to much more than its confused sense of compass directions. Personally I love it, not least because its tidal wave and steamship are real stars of the film.

          So much better than yet another dire Titanic remake.

      • It’s only to the west if you want to get there in a hurry.

        If you have the spare time and want to do a little sight seeing then east is totally the way to go. See you in three months 🙂

  6. I request that Katla and Krakatoa and other volcanoes just hold off for a few more years, because if you erupt (like, I mean, y’know, bigly) you are going to ruin my experiment.

    In an article I wrote published on 1Sept2002 (we) predicted global cooling would happen between 2020 and 2030. I’m now leaning closer to 2020 or even earlier, so please be patient. I think the quiet Sun will demonstrate that it has a much greater impact on global temperature than increasing atmospheric CO2.

    In a cooling period, there may even be some reversals of the gradual increase in atmospheric CO2. This happened before during the last global cooling period from ~1940 to ~1977.


    Annualized Mauna Loa dCO2/dt has “gone negative” a few times in the past (calculating dCO2/dt from monthly data, by taking CO2MonthX (year n+1) minus CO2MonthX (year n) to minimize the seasonal CO2 “sawtooth”.)

    These 12-month periods when CO2 decreased are (Year and Month ending in):

    Modern CO2 data collection at Mauna Loa started in ~1958.

  7. Let’s not forget this puppy (and my new measuring unit for CO2 .. the Katla):

    There is also a theory that volcanoes tend to be more active during solar minimums. If we get a couple of these to blow during the next couple of years, I’m going out and buying a whole lot of freeze dried food. All we need is a couple of years without a summer and there are going to be a whole lot of hungry people in the world.

    • Plausible, if Sol’s magnetic field changes significantly over the course of a solar cycle, and has an appreciable influence on the semi-molten metals in Earth’s mantle.

    • If you start at the eastern edge of Java and go due east, once you get almost entirely around the word you will reach Krakatoa. Funny name for a story, maybe there is a hidden meaning.

Comments are closed.