10 comments on “Two new Features on Volcano Hotspot – Your Input is wanted!

    • Yes, why not, you can of course tell us here what has been said on other websites.. fb and twitter are very good sources; people who live near to the events often post their observations first on there. If you have time you can then go and see if the eruption can be verified by newspapers or volcano observatory reports. If not, just post what you read and others will take it up and find out more. – Now I’m off to see what Soputan is up to, it has been on orange alert for a long time, as it is one of the most active ones in Indonesia. What did they say about it on fb?


  1. From fb volcanocafe: (I just copied the english part…)
    Eruption at Soputan. Ash column rose at least 4.5 km above the summit.


  2. Thanks, wdstcksj, I also found something in the local news:
    Jakarta, 07/03/2015 – Mount Soputan in Southeast Minahasa Regency, North Sulawesi erupted. PVMBG Geological Agency noted at 17:09 pm (18:09 GMT) “High eruption reaches 4,500 meters tilted towards the southeast. Pyroclastic to the west with a sliding distance of approximately 2,500 meters,” said BNPB, Sutopo Purwo Nugroho, via short message, Saturday (03/07/2015). […] Mount Soputan’s status is currently on the alert level 3. Mount Soputan has undergone several eruptions. Sutopo describes the general nature of the eruption as explosive with the activity center at the top. Source: Detik news

    Photo in tribunnews.com:

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  3. Does anybody like the idea of major earthquake swarms around or at volcanoes? My train of thought, is that might indicate volcanoes that we may want to watch as places to keep a eye on for upcoming activity.


    • Maybe… one can not say that generally, as earthquakes really don’t trigger eruptions. But near very active volcanoes that are almost always brim full of magma, they might help it erupt by changing conditions somewhat – pressure, cracks, shifting of rock masses etc. Which could of course also bring the opposite result: a volcano that was almost ready to erupt goes quiet again as the (tectonic) earthquakes have released pressure or closed pathways for magma… Not an expert here, but it seems logical to me.


  4. Mikes question got me thinking of another one: Volcanoes start erupting when the gasses that are under high pressure in the magma find a way to expand. What happens if after a big tectonic earthquake, say 100km deep, pressure and temperature conditions change so that gasses can expand there? An underground eruption, a big bang, and nothing is perceptible on the surface?


    • I have thought sometimes along the same lines; the idea being that a large tectonic earthquake can shake up a magmatic system, possibly allowing bubble formation in magma already close to the critical pressure limit. Which in some cases might. as it were, “light the fuse” leading to an eruption many months, even years, down the line. By which time any connection between quake and eruption has been long forgotten

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