21 comments on “Phreatic eruptions continue at Nevados de Chillán

  1. Thank you, agimarc! What a complex complex of subcomplexes! 🙂 I just came across this: “Carlos Eduardo Cardona, head of the Volcano Observatory of the Southern Andes said the Massif is being destabilized by a body of magma trying to move up and most likely to end in an eruptive process.” (http://www.soychile.cl/Chillan/Sociedad/2016/02/07/374167/Vulcanologo-de-OVDAS-reconoce-que-inestabilidad-del-Volcan-Chillan-podria-finalizar-en-expulsion-de-magma.aspx) So, there is more to come… likely.

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    • Great find, Granyia. Amazing complex. Seems like every dome that pokes its head above the surrounding material gets a new name. Tough to keep up with all the players. The question is how big the new body of magma is going to be. If it is similar to what caused the last couple rounds of dome building. If it is larger, we are talking about lava flows following some very ashy eruptions. Cheers –

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  2. Seismogram of the earthquake near Nevados de Chillan today (M 3.2, depth: 1km, 5km SE of Volcan Chillan); it initiated a special report from SERNAGEOMIN and was associated with rock fracturing.

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  3. Momotombo had two small eruptions today, the first at 02:00 LT. Note the increased degassing and burning from the cracks at the lower flanks of the volcano, which had increased for a couple of hours before the explosion. I wonder if that could be used as a tell-tale sign for predicting an eruption in Momotombo?

    (Click to play animated GIF)
    2016-02-12_Momo

    and another at 11:13 LT:

    webcams: http://volcams.malinpebbles.com/pubweb/C-Amerika.htm#NC

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  4. Strange things happen at Momotombo. I wonder if that is what INETER described as small cracks in the ground… they must have grown quite a bit tonight! There has been gas/smoke going up all week in that area, but never was the incandescence so widespread and so bright during the night…

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    • Howdy Granyia – I don’t think I’ve ever seen that sort of crack in a stratovolcano. Sure makes you wonder what is going to happen. Flank collapse? New cone? Fascinating. Cheers –

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  5. Also this morning, Telica (also Nicaragua) had an ashy eruption lasting more than an hour from 08:26 LT on:

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  6. Another Nicaraguan volcano getting insomnia? VolcanoDiscovery had this note about Cerro Negro in their news&activity update:
    “An unusual number of earthquakes have been noted near the volcano recently, prompting authorities to warn tourists and locals not to climb the volcano, local press reports. Whether the earthquakes are precursors of a possible new eruption is uncertain, but Cerro Negro is one of the country’s most active volcanoes with at least 23 recorded historical eruptions, last in 1992, 1995 and 1999. Cerro Negro’s eruptions are often violent with tall lava fountains and tall ash plumes, and often preceded by earthquakes”.

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    • Popular entertainment in Nicaragua: Volcano Boarding on Cerro Negro… what next?

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  7. Earth of Fire has an image of the latest lava dome on Sinabung (Ind.) by Beidar Sinabung, which has a curious shape this time, like a sea urchin or a flower head:

    Sinabung is still in eruption (and at the AWAS (4, red) alert level from June 2015 on), with lava domes growing, crumbling and collapsing as it has been for the last three years.

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    • …more of the same

      Feb 19 – 20.03 LT, credit: Zulkarnain Ginting:

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    • Hi

      lovely pic but nasty look…seems very unstable. You can see there is a very clear color difference between the extruding lava and the rest which is probably due to rock alteration by the gases.

      Thanks for the article as always I take great pleasure reading them.

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      • Hi dfm, good to hear from you! Did you mean the rock of the dome changed by gases? The darker color of the dome must be the more “original”, while all the rest is changed by oxidation/corrosion/weathering, don’t you think?

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        • Hi Granyia
          that’s what I mean. The “new” rock extruded has a darker color and the surrounding rock has been altered by the gases.

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  8. And another lava dome is growing on the opposite side of the globe in Mexico: Fresh magma is rising in v. Colima and creating an as yet small dome, about 25 m in diameter and 10 m high, in a crater about 300 meters across. The crater is observed to be deeper than last year so it will last longer (yet depending on growth rate) before a new dome will crumble over the edge, but the destruction of a larger dome might be more violent. The images were taken on a private overflight this week, paid by the teacher-researcher at the Univ. of Colima Nick Varley and his students. http://www.ucol.mx/enterate/nota.php?docto=2473

    ——

    Sernageomin: Video of a flight over Nevados de Chillán, published today. It looks as if there are several new craters in the making:

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