Tag Archives: calbuco

Recent Rumberlings

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Again I must apologise for a lack of posts although there has been a lot occurring in the past few weeks. Sadly life as an Open University student (something I will be writing on shortly), working full-time and having a rather active 7-year-old means my little old website tends to get forgotten about. But enough of my belly aching here of some of the world-wide volcanic updates for the month of May.

Shindake 

Friday at 9.59 am local time Mount Shindake on the island of Kuchinoerabu erupted with little warning. The plume scaled over 9 km high and a pyroclastic flow reached as far as the shore. The alert level was rasied to 5 and all 141 people on the island have been evacuated to neighbouring Yakushima island or the mainland and no one has been reported to have been hurt. It is thought that further explosions or more pyroclastic flows are likely as this volcano rarely produces one-off events. When Shindake erupted on August 3rd last year activity lasted for several days.

Telica

Sods law, I was in Nicaragua only a few months ago and all was relatively quiet. Now both Telica, north of the city of Leon and Concepción on the island of Ometepe have seen small eruptions in the past few weeks. Telica, the more active of the two, hit headlines on May 11th when a group of hikers filmed a small eruption at the summit. The night before a loud explosion was heard but not ash could be seen and it was still deemed safe for people to climb its flanks the next day. I will be honest the video which emerged did annoy me slightly as it is very indicative of todays society; of course when some thing explodes one does not think of their own safety, oh no we get our cameras out and film!

It produced about 50 small explosions within the next week or so before several days of apparent calm. It came back to life again on May 27th with a slightly larger eruption which created an ash column just over 3 km high. It is not thought that these explosions are an indication of movement of magma, rather phreatic eruptions.

Concepción on the other hand experienced about 60 small explosions on May 8th and several small earthquakes nearby. No ash was record although high gas emissions were recorded. By May 24th there had been 947 small explosions near the summit.

Wolf

Isle Isabella, the Galápagos’ largest island, is also home to its most active volcanoes. Last week Volcan Wolf began erupting with lava flows on its south eatern flank and producing an eruption column almost 15 km high according to the Washington VAAC. Satellite monitoring indicates that to plume is sulphur dioxide rich with little ash, with up to 200 kt of sulphur dioxide being emitted during the first 13hrs of the eruption alone.  Media coverage of the eruption has been higher than usual seeing as little threat is posed to the human residants, however the Galapagos islands are rich in wild life found no were else on Earth are being threatened by the situation. 

Piton de la Fournaise

A eruption began on May 17th and continued through to May 26th at Piton de la Fournaise, Reunion Island’s most active volcano. Activity and output has decreased on a whole however shows little sign of ending. 

Calbuco

The alert remains at orange for Calbuco although activity is lower than in recent weeks. Incandescence has still be osbsvered at the crater up until the night of the 26th and small gas and ash plumes tend to be about 300 m abover the summit. 6,685 people are still displaced by the 20 km exclusion zone which remains in place.
Figure 1; Shindake http://beforeitsnews.com/environment/2015/05/mount-shindake-volcano-eruption-2015-japan-issues-highest-alert-2529958.html

Figure 2; Telica http://www.stuff.co.nz/world/68521780/nicaraguas-telica-volcano-roars-to-life-spewing-ash-gas

Eruption Update

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I may have bee quiet on eruption updates lately but that is far from meaning our restless Earth has been quiet. Here is some of the recent updates.

Kilauea 

As Kilauea has been in a constant state of eruption since 1983, some don’t consider changes in activity as news. However as the June 27th lava showed us this relatively calm giant still poses a threat to people.

USGS reports suggest that the summit is still inflating; 7.5 microradians were recorded in the past week alone. Over the weekend we saw rapid filling of the Halema’uma’u crater from a depth of 90 ft from the crater rim to within 10 ft by Sunday lunch time. Yesterday (April 29th) the webcam observed small explosions and spattering with rock falls as the crater began to overflow.

Seismicity remains at an increased level towards the summit and East rift zone where wide spread breakouts from the eruption site are active as close as 8 km of Pu’u ‘O’o. There has be net inflation of Pu’u ‘O’o over the past week but not as significant as at the summit. As the June 27th Lava flows nears its 1 year anniversary incandesance indicates that surface flows remain active northeast of Pu’u ‘O’o.

Calbuco

Although the more explosive phase of the eruption seems to have died down, there are still high ash emissions and flight disruption is still an issue across both Chile and Argintina with ash plumes trailing to the north and south east at just over 1.5 km high. The 20 km exclusion zone is still inplace however it is belived that some people have returned to their homes within the area with maximum displaced 6,514 at the begining of this week. Seismicity has since declinded but it is still under observation.

Sinabung

Collapse of the lava dome on April 28th caused a pyroclastic flow to surge down the flanks. Luckily exclusion zones are still in place from activity over the past few months. The Darwin VAAC  said an ash columb exceeds 14,000 ft although satalitte confirmation has not been possible due to cloud coverage.

Aira

JMA reported that 29 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m during 20-24 April. Nine of the explosions generated ash plumes that rose 3 km above the crater rim; one explosion, on 24 April, produced an ash plume that rose 4 km. Incandescence from the crater was visible on one night. The Alert Level remained at 3 (on a scale of 1-5). Based on JMA notices, the Tokyo VAAC reported that explosions during 22-28 April generated plumes which rose to altitudes of 1.5-4.9 km and drifted S, SE, E, NE, and N.

Tungurahua

Moderate-to-high seismic activity at Tungurahua during 22-28 April, characterized by long-period events, tremor, and explosions. On 28 April an emission with a minor ash content rose 3 km and drifted W. Roaring was noted and lahars descended the La Pampa (NW) and Rea drainages.

Popocatepetl

During 22-28 April the seismic network at Popocatépetl recorded 25-91 daily emissions mostly consisting of water vapor and gas. Cloud cover sometimes prevented observations of the crater, although gas plumes and nighttime crater incandescence were noted daily. On 22 April an explosion at 01.21 produced diffuse gas and water vapor emissions. Explosions at 16.43 and 17.58 local time generated ash plumes. The Alert Level remained at Yellow, Phase Two.

Krakatoa

PVMBG reported that during 1 March-21 April diffuse white plumes rose 25-50 m above Anak Krakatau, although foggy weather often prevented observations. Seismicity continued to be dominated by shallow and deep volcanic earthquakes, as well as signals indicating emissions. The Alert Level remained at .

Sheveluch

During 17-24 April the lava dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot block avalanches, and fumerolic activity. A thermal anomaly was detected during 16-18 and 23 April; cloud cover obscured views on the other days. The aviation code remained at Orange.

Figure 1; http://fineartamerica.com/featured/halemaumau-by-moonlight-grant-kaye.html

Figure 2; http://news.yahoo.com/image-asia-pyroclastic-flows-erupt-mount-sinabung-121702289.html

Calbuco

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I awoke this morning to my phone buzzing with notifications. Not just the usual earthquake alerts and job search emails, but while I slept Calbuco in Chile had begun a tremendous eruption. Many of my friends and family had sent me tweets and links to eruption update; have to say it touched me that so many know my passion for these things.

Figure 1. High out put of SiO2 quickly coloured the skyline with stunning pink and red hues.

I have not yet found an estimate for the ouput of either eruption but it is very evidant that high levels of SiO2 were released as the skyline quickly appeared purples and pinks giving us some spectacular imagery of the eruption as seen in figure 1 above. 
Calbuco is sat near the tourist area of Puerto Montt in Southern Chilie. It is apart of the second largest volcanic chain in the world (Indonesia being the largest), but despite the high levels of activity in the region this particular volcano has been quiet for the past 42 years. This changing rapidly yesterday afternoon. Very little warning was given in the run up to the initial blast with a volcanic swarm occurring just before 6 pm local time and then the eruption began at roughly 6.15. A second spate of activity began around 1.05 am this time with lava being clearly visible through the pyroclastic material. The Bueno Aries VAAC puts the eruption column at 10 km (33,000 ft) although there is speculation from other sources that it is nearly double that. Chile has actually been relatively quiet volcanically this with only Villarrica giving us a show in March. This outburst is believed to be much larger and may be more prolonged.

  
Calbuco, albeit quiet recently, actually caused one of Chile’s worst eruptions back in 1893-94.  Although the seen seems to have calmed since the second blast it is strongly believed that this eruptive phase is not over and further eruptions may occur in the next few days or weeks. It is also thought a more careful watch will now also be made on Puyehue which often erupts at the same time of soon after Calbuco. Andean volcanoes are typically very explosive due to the andesitic lavas they produce. 

 

Figure 1; http://time.com/3832353/calbuco-volcano-erupts-chile/?xid=tcoshare