Chilean volcano awakens after 20 years of silence- unleashes 1 km high cloud of smoke

October 27, 2011CHILEThe National Service of Geology and Mining (SERNAGEOMIN) – Volcano Observatory of the Southern Andes (OVDAS), announced that from the early hours of last night there has been increased seismic activity related to the Hudson volcano. At 19:08 local time, an earthquake Volcano-tectonic (VT), magnitude (ML) equal to 4.6 located 7 km to the NW edge of the caldera, at a depth of 19 km, which was followed by the occurrence of a seismic swarm starting at 21:49 hrs, includes more than 100 seismic events recorded until the time of this report, whose depths range from 15 to 25 km. It notes that 15 events recorded magnitudes (ML) greater than 3.0 and three (3) of these magnitudes (ML) greater than 4.0, all characterized by having more to do with broken rock (VT) at 00: local 20 hours today, Wednesday, October 26, an earthquake associated with fluid movement and characterized by very low frequency (long period – VLP), located in the same area at a depth of 15 km, with a magnitude (ML) equal to 4.3. The seismic swarm continues at the time of issuance of this report with less intensity. The preceding activity indicates that the volcanic system has experienced changes in their dynamics, possibly associated magmatic activity at depth, which in the future the system can lead to imbalance. –Sernageomin  translated
Pre-eruption: The Chilean authorities decided to raise the alert level to red and preventive evacuations in an area of ​​40 kilometers around Mount Hudson. The column emission from the eruption reached 1 km in height. The information was confirmed this afternoon from Vice President Rodrigo Hinzpeter Onemi, from where he said he “cannot rule out an eruption,” so it was decided to evacuate people living in that radius.” An over-flight of the area showed a column of smoke and gases out of the cone of the Hudson. In addition, there were some signs of an avalanche in the vicinity. –Diarioandino
Hudson’s explosive history: “Large eruptions around 4750 BCE and 1890 BCE are believed to have been of Volcanic Explosivity Index VEI 6; these are probably responsible for the large caldera. The 4750 BCE eruption may have wiped out many if not all groups of early man living in central Patagonia at that time, based on evidence from the Los Toldos archaeological site. Before 1970, little was known about the mountain. Minor eruptive activity began in 1970 and melted parts of the glacier, raising river water levels and leading to the identification of the caldera. In August-September 1971, a moderate eruption (VEI 3) located in the northwest area of the caldera sent ash into the air and caused lahars from the melting of a large portion of the glacier. The lahars killed five people; many more were evacuated. It’s last eruption in August to October 1991 was a large plinian eruption with a VEI of 5, that ejected 4.3 km3 bulk volume (2.7 cubic km of dense rock equivalent material). Parts of the glacier melted and ran down the mountain as mud flows. Due to the remoteness of the area, no humans were killed but hundreds of people were evacuated from the vicinity. Ash fell on Chile and Argentina as well as in the South Atlantic Ocean and on the Falkland Islands. In addition to the ash, a large amount of sulfur dioxide gas and aerosols were ejected in the eruption. These contributed to those already in the atmosphere from the even larger Mount Pinatubo eruption earlier in the year and helped cause a worldwide cooling effect over the following years. Ozone was also depleted, with the Antarctic ozone hole growing to its largest levels ever recorded in 1992 and 1993.” –Wikipedia
contribution Luisport
This entry was posted in Earth Changes, Earth Watch, High-risk potential hazard zone, Land fissures, cracks, sinkholes, Potential Earthchange hotspot, Seismic tremors, Volcanic Eruption, Volcano Watch. Bookmark the permalink.

9 Responses to Chilean volcano awakens after 20 years of silence- unleashes 1 km high cloud of smoke

  1. Blaze says:

    That is a telling event! Thanks Alvin!

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  2. Evo says:

    The Turkey quake and all its aftershocks, have been bombarding the Nazca Plate with seismic waves daily. Perhaps it is just coincidence, but I really feel that they can trigger an event faster than it should naturally occur.
    The 7.4 earthquake in the Karmadic Islands Region occurred two days before the Turkey earthquake. Its seismic waver were directed towards Turkey. But again this is probably just coincidence.

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  3. Merde, I live near this vocano in Comodoro Rivadavia, Argentina….bad,bad news. The eruption of 91´ was devastating for the farmers of Los Antiguos-Perito Moreno, it took years to recover the productivity in the farmland…..and now, Puyeue , an the Hudson again, in the same year….bad,bad news…

    Sorry for my very poor english, but I´am a constant reader of the Extinction Protocol website, and this is the first time my zone is in ´´the news´´….

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  4. scampi says:

    I have read that the average yearly volcanic eruptions is between 50-70. Does this year seem an exception or does it appear more average?

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    • I’m afraid this year the numbers won’t reveal much so we have to look beyond the data. It’s not an average year by any stretch…the number of eruptions is slightly lower than average but there are other disconcerting aspects of the volcanism, in my mind, that are more cause for concern. It’s not your typical volcanoes blowing off steam- instead; we’re seeing more activity from volcanoes waking from dormancy, more erupting in concert with tectonic plate activity, and even stirrings among some of the super-volcanoes. The number of earthquake swarms erupting across the globe is unprecedented as well as the levels of seismic activity at the planet’s hotspots or magma plumes. The Nabro volcano erupted this year for the first time in recorded history and according to geologists, the million-year old super-volcanic fields in the southern hemisphere could be showing signs of unrest- particularly, with the astonishing inflation rate going on with the Uturuncu volcano in Bolivia. So it appears this year may be the staging ground for what could potentially be the next phase of geologic events to befall the planet.

      Alvin

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      • Bone Idle says:

        Alvin is right.
        here’s three scenarios.
        (a) The Sun is in a state of unprecedented historical scientifically studied activity (or lack of it).
        (b) Large and unusual amount of tectonic activity.
        (c) The usual suspect volcanoes are doing what they always have however dormant or thought to be extinct volcanoes are showing signs of unexpected unrest.

        The latter two are most likely related to item (a)

        Here’s the kicker. Geologic activities have a very small worldwide study budget. Resources are stretched and the U.S.G.S. (pour example) has priorities in the U.S, rather than in the countries with the greatest number of volcanoes (Indonesia and Chile)
        These unusual current geologic activities have the potential to affect the human population in a large and expensive way. You only need to look at the recent activity of the Eyjafjallajökull Volcano in Iceland volcano to see the billions of dollars that was lost.

        Global warming has had billions of dollars spent on research on a subject that may turn out to be a “Subjective”. Volcanoes, Earthquakes and Tsunamis are known threats. A few of the global warming research dollars should be thrown at known threats rather than perceived computer generated model alarmism.

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