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Posts Tagged ‘San Carlos de Bariloche’

Puyehue ash raises river temp, kills salmon stock

Posted by feww on June 11, 2011

Hot pyroclasts from ongoing Puyehue eruption raise River Nilahue temp to 45ºC (113ºF)—a rise of 35ºC

Tens of thousands of tons of hot volcanic materials from the ongoing Puyehue eruption have raised the temperature of Nilahue River to 45ºC (113ºF)—a rise of 35ºC, compared with seasonal average—contaminating the water and killing a large number of salmon, Chilean Public Works Minister.

The area near the Nilahue and GolGol rivers basin was evacuated on June 10, 2011 after the two rivers overflowed their banks, blocked by volcanic debris. The river flow rose by more than five fold, from 30 cubic meters per second (cmps) to more than 160 cmps, the minister said.


Nilahue River Chile. The river originates in Cordón Caulle volcanic range and discharges into Ranco Lake. Credit: Hprmedina.

Buenos Aires VAAC said Puyehue activity had intensified Thursady/ early Friday, but released the following bulletin reporting ‘DECREASING ACTIVITY’ late Friday.

VAAC: BUENOS AIRES
 VOLCANO: CORDON CAULLE 1507-141
 PSN: S4052 W07220
 AREA: CHILE-C
 SUMMIT ELEV: 1798M
 ADVISORY NR: 2011/030
 INFO SOURCE: GOES 12 - GFS MODEL
 ERUPTION DETAILS: DECREASING ACTIVITY
 OBS ASH DATE/TIME: 10/1900Z
 OBS ASH CLOUD: SFC/FL150 S4052 W07220 - S4100 W07100 - S4145 W06800 -
 S4140 W06300 - S4300 W06300 - S4340
 W06700 - S4155 W07100 -S4052 W07220
 FCST ASH CLD +06HR: 110200Z SFC/FL150 S4052 W07220 - S4116 W06800 -
 S4130 W06510 - S4150 W06120 - S4335
 W06141 - S4325 W06740- S4052 W07220
 FCST ASH CLD +12HR: 110800Z SFC/FL150 S4052 W07220 - S4143 W06555 -
 S4150 W06020 - S4413 W06030 - S4355
 W06745 - S4052 W07220
 FCST ASH CLD +18HR: 111400Z SFC/FL150 S4052 W07220 - S4124 W06317 -
 S4025 W05547 - S4312 W05630 - S4350
 W06100 - S4367 W06720- S4052 W07220
 RMK: MULTISPECTRAL SATELLITE IMAGERY SHOW AREA OF REMANENT VA ASH
 FROM PREVIOUS EMISION
 SFC/FL140 MOV E 40KT TREND DISSIPATING AREA S3600 W05800 - S2800
 W05300 - S02900 W04500 - S3000 W04000 -
 S3300 W03900 - S3900 W04500 - S3500 W04300 - S3100 W04500 - S3000
 W05200 - S3600 W05800
 FCST ASH CLD+06HS: SFC/FL150 110200Z S3500 W05400 - S2700 W04500 -
 S2600 W04100 - S3000 W03800 - S4000
 W040 - S3300 W04200 - S3100 W04500 - S3500 W05400
 FCST ASH CLD+12HS: 110800Z NO ASH EXP
 FCST ASH CLD+18HS: 111400Z NO ASH EXP
 NEXT ADVISORY: WILL BE ISSUED BY 20110611/0200Z

Air Travel

Flights from several airports in Argentina, Uruguay and southern Brazil. remain grounded for a third day on Saturday.

“At least six international carriers suspend flights between Buenos Aires and cities in US, Europe and South America,” a report said.

“Many flights from airports in southern Brazilian cities such as Porto Alegre and Florianopolis – some 2,500km (1,550 miles) from the volcano – were cancelled on Friday,” according to another report.

San Carlos de Bariloche

Meanwhile, in the ski resort city of San Carlos de Bariloche,  workers removed about 15,000 tons of volcanic ash (600 truckloads) from the airport’s main runway on Thursday.  Authorities said the airport would remain closed at least until June 21, AP reported.

Puyehue Volcano Satellite Images


A fissure on Puyehue-Cordón Caulle volcanic range opened on June 4, 2011, ejecting ash to a height of about 16km. Natural-color image captured by MODIS on the Aqua satellite moments after eruption began. Source: NASA-EO. Click images to enlarge.


Eruption at Puyehue-Cordón Caulle began on June 4, 2011. This natural-color satellite image was taken by the MODIS aboard Terra satellite on the early morning of June 6, 2011, when according to the Buenos Aires Volcanic Ash Advisory Center the ash plume was reaching an altitude of about 12km above the summit crater.  Source: NASA-EO. Click image to enlarge.

Click animation link to view the transport of the plume from 1:45 pm local time June 4, 2011, until 10:45 am June 6, 2011.

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FIRE-EARTH Volcano Watch

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Chile’s Puyehue volcano explodes

Posted by feww on June 5, 2011

Puyehue-Cordon-Caulle erupted ejecting a 10-km high plume of ash into the air

“The Cordon Caulle has entered an eruptive process, with an explosion resulting in a 10-kilometer-high gas column,” state emergency office ONEMI reported.

The authorities were forced to evacuate at least 3,500 people from areas near the volcano.

A large cloud of ash was reported over the Patagonian ski resort town of Bariloche in the neighboring Argentina, about 160 km east of the volcano,   forcing the local airport to close.

“We’re trying to stop car traffic and ask that people stay at home and close their doors and windows to prevent the volcanic ash from coming in. The city’s airport was also closed,” an eyewitness told the local TV station.

“Ash was dumped like a snowstorm… The city is covered in grey ash.”

“Eyewitness Juli Kessler told the BBC she saw ‘big black clouds hanging over the Andes’ and ash dust lying on the road.”

Map of Chile’s volcanoes with the approximate  location of Puyehue-Cordon-Caulle volcano marked by FIRE-EARTH.

The governor of Chile’s Los Rios region was reported as saying that fire was seen in the volcano’s crater as a large plume of smoke billowed out.

“You can see the fire (in the volcano) and a plume of smoke, and there’s a strong smell of sulfur,” he told reporters.

The volcano is located about 840 km (522 miles) south of Santiago, the national capital. Its  last major eruption occurred in 1960, after a magnitude 9.5 earthquake struck Chile about 260km directly north of the volcano.

Chile is home to about 2,000 volcanoes (world’s 2nd largest volcanic chain after Indonesia), of which 500 of are classified as active, with about 55 of them having erupted historically. Llaima and Chaiten, two other Chilean volcanoes, have erupted in the past few years.

Puyehue-Cordón Caulle

Location: Central Chile
Last Known Eruption: 1990
Summit Elevation: 2,236m 7,336 feet
Latitude: 40.590°S
Longitude: 72.117°W
Source: GVP

The Puyehue-Cordón Caulle volcanic complex (PCCVC) is a large NW-SE-trending late-Pleistocene to Holocene basaltic-to-rhyolitic transverse volcanic chain SE of Lago Ranco. The 1799-m-high Pleistocene Cordillera Nevada caldera lies at the NW end, separated from Puyehue stratovolcano at the SE end by the Cordón Caulle fissure complex. The Pleistocene Mencheca volcano with Holocene flank cones lies NE of Puyehue. The basaltic-to-rhyolitic Puyehue volcano is the most geochemically diverse of the PCCVC. The flat-topped, 2236-m-high Puyehue volcano was constructed above a 5-km-wide caldera and is capped by a 2.4-km-wide summit caldera of Holocene age. Lava flows and domes of mostly rhyolitic composition are found on the eastern flank of Puyehue. Historical eruptions originally attributed to Puyehue, including major eruptions in 1921-22 and 1960, are now known to be from the Cordón Caulle rift zone. The Cordón Caulle geothermal area, occupying a 6 x 13 km wide volcano-tectonic depression, is the largest active geothermal area of the southern Andes volcanic zone. Photo by Klaus Dorsch, 2001 (University of Munich); caption: GVP

Inches of volcanic ash 100 miles away


Argentine resort city of San Carlos de Bariloche, about 160 km (100 miles) east of Chile’s Puyehue, seen covered by volcanic ash from the June 4 eruption. Photo Credit: Reuters/Trilce Reyes. Image may be subject to copyright. More images…

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