19 comments on “Roaring Raung – June/July 2015

  1. Thank you, you two! 🙂

    The volcano Mt. Gamalama on the island of Ternate, North Maluku, Indonesia, erupted this morning at 09:58 hrs. local time, sending dark clouds of volcanic ash some 2 700 meters into the sky. The staff at Volcano Observation Post Gamalama in Ternate said, Gamalama began to show increased seismic activity since Wednesday. So far, it is thought to be phreatic explosions and a restriction zone of 1.5 km has been established. Also, for safety reasons, the airport Sultan Babullah in Ternate has been closed until further notice. (Source: various Indonesian newspapers)


    • Thanks, hmm…, I use a proxy server now, so that my location is hidden, and that works. Otherwise I get this when I try look at the cams on the Badan Geologi website (http://www.vsi.esdm.go.id/index.php/gunungapi/kamera-gunungapi):

      I hope some more people will write me their experience here, then I can contact Badan Geologi about the matter.

      The webcam is showing the same heavy ash plume right now as in my screenie yesterday (yes, it is working! 🙂 ) Gamalama is still at alert level 2, the Ternate airport and another small one nearby are still closed, God knows what that volcano is planning.

      – I alwayis thought phreatic eruptions consist of separate explosions, not of continuous activity… there must be a stream of water going in? Or, like with Colo – and Ternate being a similar island, seawater is seeping in providing a constant supply. Now, that would be not good, because it is so unpredictable. But I guess if that was the case, scientists would have informed about the danger. Just thinking.

      Still very busy too, no change, although it was said in one newspaper that the activity decreased somewhat. But they have said that before.


      • NO cams in Andorra
        Within a few days I will try it in France (i’m sorry, forgot about it yesterday..)


  2. Updates UBINAS and SABANCAYA

    Though seismic activity at Ubinas has decreased there are still very ashy explosions/exhalations (what’s the difference?) annoying the residents of the area.

    Sabancaya, who had been emitting steam plumes (recently with low ash content) for months, has been declared entering a new magmatic eruptive phase officially. In recent ash samples dominating amounts of juvenile (fresh) magma shards have been found.

    On both volcanoes, a specialist of the Geophysical Institute of Mexico UNAM (Universidad Nacional Autonoma de Mexico) and professionals of INGEMMET conducted monitoring of sulfur gases (SO2). These measurements were made on July 8/9 with an ultraviolet camera and DOAS system (Differential Optical Absorption Spectrometer), and gave as results the flow of sulfur dioxide issued in recent weeks. The results show
    SO2 values ​of 500 – 4000 tons/day for Ubinas,
    SO2 values ​of 500 – 2500 tons/day for Sabancaya,
    which are classified as moderate to large flows, meaning an atypical activity.

    For those interested in tephra composition:
    Volcanological Observatory experts from INGEMMET made an observation climb to the top of Sabancaya during 09/10 July. They acknowledged ash emitted by the volcano in recent weeks. This ash is gray and grains are less than 0.5 mm. In crystals of plagioclase, biotite and amphibole (magmatic silicates) are observed. Plagioclase crystals are less than 0.5 mm, some have tabular forms. Biotites are up to 0.2 mm and are slightly altered. Amphiboles are encompassed by the fresh and juvenile lithic. Likewise, glassy matter measuring up to 0.1 mm is observed, this is translucent and amorphous. Lithic fresh or dark gray juvenile, measuring up to 0.3 mm and rusty reddish stone measuring up to 0.2 mm were also sampled in two types of different stone. Importantly, juveniles predominate in the ash fragments suggesting that the Sabancaya entered an eruptive phase of magmatic origin, which may increase in the coming weeks or months.


    Click to access reporte_ubinas_201530.pdf



      • If I understand correctly, the method of the two is basically the same – measuring the amount of ultraviolet light absorbed by sulfur dioxide molecules within a volcanic plume. While COSPEC has been in use for over 20 years (originally, it was developed for measuring industrial pollution), DOAS is a new (2015) portable instrument that is faster and lighter for more convenient use.
        DOAS: http://www.j-sens-sens-syst.net/3/355/2014/jsss-3-355-2014.html


        • Thanks for that, Granyia; from the link it looks like a good development; lighter, more sensitive, more versatile, and designed for the job, not an adaptation of existing ‘industrial pollution’ equipment


    • No, just google for free proxy, tip-toe your way through the advert traps, and paste your desired URL into the appropriate box. It’s mostly further down, less obvious than the ads.


  3. I was quite shocked earlier today when I saw the webcam images of Mt. Guntur volcano (Indonesia)… there was fire on the slope in several spots! Googling the local newspapers, it turned out that forest fires had emerged in different places, destroying several hundred ha of wood and creeping up the slope. Although there were some fires each year in the dry season, none have been so big. The spokesperson said, it is as yet unknown what exactly sparked the fires. A lot of mountaineers have been called back and all are accounted for. They said on Sunday morning that hopefully all fires are extinguished, but it seems they were wrong about that.

    Nothing to see now; I just hope it is not the volcano secretly playing with fire! 😉


  4. Gosh, the Raung hot spots look worse than ever (top right on this page). It’s plume was going more in NW direction today, giving Bali airport a break, but instead Surabaya airport had to close.

    Also, Gamalama is still causing trouble. 1500 people had to be evacuated. – As if that were not enough, Sinabung, who’s activity had abated a bit, is producing pyroclastic flows again.

    I feel sorry for all those people who have to live with the masks and sometimes hard hats all the time. It must be a horrible feeling if you can’t take a deep breath of clean fresh air for such a long time.


  5. Cleeveland volcano in the Aleutian Islands (Alaska) has been set on orange alert level today. AVO detected an explosion at Cleveland volcano at 08:17 AKDT (16:17 UTC). Satellite views below about 30,000 feet above sea level have been obscured by clouds. Observers from a boat on the northeast side of the volcano reported seeing a dusting of ash on the snow near the summit of the volcano as well as moderate steaming from the summit area.

    This is a composite Landsat 8 image of Cleveland from the afternoon of 14 June 2015 (last month!). The shortwave-IR data in color shows elevated temperatures in the summit. Note the light dusting of ash on the north flank as observed by C. Read on his commercial flight back to Anchorage. Snow-free ground near the summit is also evident, but not necessarily unusual.

    And this is what an explosion in Cleveland looks like on the helicorder… who would have thought?!

    (from AVO, http://www.avo.alaska.edu/activity/Cleveland.php)

    Staying in the northern realms, in the Kuril Islands both volcano Chirinkotan and volcano Snou on the Chirpoi caldera (Brat’ya Islands) have shown hot spots in Satellite images yesterday. Subsequently, Chrinkotan’s alert level has been raised to yellow, while Snou had been yellow before.

    Liked by 1 person

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