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Posts Tagged ‘Reventador’

VolcanoWatch Weekly [25 Nov 2009]

Posted by feww on November 26, 2009

VOW: to be announced…

SI / USGS Weekly Volcanic Activity Report
(18 November – 24 November 2009)

New activity/Unrest:

Volcano News (Source: GVP)

An explosive eruption from  detected by the seismic network on 20 November prompted INGEOMINAS to raise the Alert Level. Residents reported five explosions, sound waves, and incandescence from multiple areas in the crater.

During 18-24 November, HVO reported that lava flowed SE from beneath Kilauea’s Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the ocean. On 21 November, a sliver of the rim collapsed and was followed by an explosion that produced a dense brown plume that dissipated after a few minutes. Watch the video here. Source: GVP [Note: The video has .mov format and cannot be run on Windows Media Player.]

Ongoing Activity:

Batu Tara, Komba Island (Indonesia);  Chaitén, Southern Chile;  Karymsky, Eastern Kamchatka;  Kilauea, Hawaii;  Kliuchevskoi, Central Kamchatka (Russia); Pacaya, Guatemala;  Popocatépetl, México; Rabaul, New Britain; Reventador, Ecuador; Sakura-jima, Kyushu; Santa María, Guatemala; Shiveluch, Central Kamchatka (Russia); Soufrière Hills, Montserrat; Suwanose-jima, Ryukyu Islands (Japan)

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VolcanoWatch Weekly [11 Nov 2009]

Posted by feww on November 12, 2009

SI / USGS Weekly Volcanic Activity Report
(4 November – 10 November 2009)

New activity/Unrest:

Batur, Bali (Indonesia);  Galeras, Colombia; Karangetang [Api Siau], Siau I; Mayon, Luzon;  Nevado del Huila, Colombia;  Piton de la Fournaise, Reunion Island; Reventador, Ecuador;  San Vicente, El Salvador

GVP Volcano News:

OVPDLF reported that on 5 November a vent inside the S part of Piton de la Fournaise’s Dolomieu crater opened, following an intense seismic crisis. Within thirty minutes, a fissure on the upper SE flank propagated E and a second fissure opened on the E flank.

PHIVOLCS reported that on 11 November an explosion from Mayon’ssummit crater ejected incandescent rock fragments seen from nearby areas. Cloud cover prevented observations of an ash plume, however fieldinvestigations after the event revealed ashfall to the SW.—GVP

Ongoing Activity:

Chaitén, Southern Chile;  Dukono, Halmahera;  Karymsky, Eastern Kamchatka;  Kilauea, Hawaii;  Kliuchevskoi, Central Kamchatka (Russia); Koryaksky, Eastern Kamchatka;  Rabaul, New Britain;  Sakura-jima, Kyushu;  Santa María, Guatemala;  Shiveluch, Central Kamchatka (Russia); Soufrière Hills, Montserrat; Suwanose-jima, Ryukyu Islands (Japan)

 

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FEWW Volcanic Activity Forecast

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VolcanoWatch Weekly [28 Oct 2009]

Posted by feww on October 29, 2009

VOW: Nevado del Huila

Eight of Colombia’s 15 volcanoes have erupted in the last 100 years, and three of them since 1990: Galeras, Nevado del Huila, and Nevado del Ruiz.

nevado del huila
Nevado del Huila emitting ash [October 17, 2009.] As of posting more than a 1,000 tremors have been detected since Huila became restless on October 16, 2009. Photo: INGEOMINAS/Colombian Govt.

Nevado del Huila Emits Ash

huila_tmo_2009301
Nevado del Huila became active on October 16, 2009. Tremors indicating movement of fluid within the volcano, surface emissions of gas and ash, and other volcanic activity have been reported recently by the Colombian Institute of Geology and Minerals (INGEOMINAS). Towering emissions of volcanic ash have also been reported almost daily.    A column of ash reached flight level 11,000 meters (36,000 feet) on October 28, 2009. This natural-color image from the Moderate-resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite captured the plume at 10:15 a.m. Thick gray ash is visible over the summit of Nevado del Huila, with a diffuse plume stretching northwest (towards the upper left corner of the image).     According to the newspaper El Liberal, ashfall in the surrounding areas was a nuisance, but not yet a serious risk to health. INGEOMINAS assigned Huila an alert level of Orange, meaning an eruption is probable within days or weeks. NASA image by Jeff Schmaltz, MODIS Rapid Response, Goddard Space Flight Center. Caption by Robert Simmon.

Volcano of the Week Details

Name: Nevado del Huila
Country: Colombia
Region Name: Colombian Andes
Volcano Type: Stratovolcano
Last Known Eruption: 2009
Summit Elevation: 5,364 m (17,598 feet)
Latitude: 2.93°N
Longitude: 76.03°W
Source: GVP


Huila, the highest active volcano in Colombia, is an elongated, N-S-trending snow-capped stratovolcano, constructed inside an old caldera. The 5364-m-high volcano is seen here from the SW, with the northern peak (La Cuesta) on the left and the lower southern peak on the right flanking Pico Central, the volcano’s high point. Two persistent steam columns rise from the southern peak.  Photo by Juan Carlos Diago, 1995 (courtesy of Bernardo Pulgarín, INGEOMINAS, Colombia). Caption: GVP


An explosive eruption ruptured the summit of Nevado del Ruiz on November 13, 1985, spewing about 20 million cubic meters of volcanic ash and rocks into the air. Forty-meter thick lahars traveling at velocities of up to 50 kilometers per hour destroyed the town of Armero 74 km away from the explosion crater, killing more than 23,000 people. [Source: USGS]

SI /USGS Weekly Volcanic Activity Report
(21 October – 27 October 2009)

New activity/Unrest:

GVP Volcano News:

PHIVOLCS reported that on 28 October a minor ash explosion from Mayon produced a brownish ash plume that rose 600 m above the crater and drifted NE.

Based on web camera views, INGEOMINAS reported that on 21 October continuous gas emissions rose from Nevado del Huila and pulses of ash emissions produced plumes that drifted E. Observations during an overflight on 23 October revealed that gas-and-ash emissions originated from two locations.

Ongoing Activity:

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VolcanoWatch Weekly [20 August 2009]

Posted by feww on August 22, 2009

Volcanic Activity Report: 12 August-18 August 2009

VoW: Talang

Talang
The Indonesian volcano Talang on the island of Sumatra had been dormant for centuries when, in April 2005, it suddenly rumbled to life. A plume of smoke rose 1000 meters high and nearby villages were covered in ash. Fearing a major eruption, local authorities began evacuating 40,000 people. Caption: James A. Phillips, NASA.

And just to confuse the readers a little, the following caption is by volcano.oregonstate.edu

Talang is a stratovolcano with 8 confirmed eruptions between 1833 and 1968. The volcano may have had a phreatic eruption in 1986 but the activity has not been confirmed. Most of the eruptions are moderate in size (VEI=2) and explosive. Eruptions in 1833, 1843, 1845, and 1876 were from flank vents. An eruption in 1967 and two different eruptions in 1968 were from radial fissures. The distance from the city of Padang to Talang is about 35 km. Image courtesy of the Landsat Pathfinder Project.

TALANG
Country: Indonesia
Region: Sumatra
Last Known Eruption: 2007
Summit Elevation: 2,597 m (8,520 feet)
Latitude: 0.978°S  (0°58’42″S)
Longitude:  100.679°E (100°40’46″E)
Source: GVP


Talang, which forms a twin volcano with the extinct Pasar Arbaa volcano, lies ESE of the major city of Padang and rises NW of Dibawah Lake. Talang has two crater lakes on its flanks; the largest of these is 1 x 2 km wide Danau Talang. Most historical eruptions have not occurred from the summit of the volcano, which lacks a crater. Historical eruptions from Gunung Talang volcano have mostly involved small-to-moderate explosive activity first documented in the 19th century that originated from a series of small craters in a valley on the upper NE flank. Photo by Ruska Hadian, 1986 (Volcanological Survey of Indonesia). Caption: GVP.

Authorities raise Mt. Talang alert level to highest

The vulcanology and disaster mitigation office in West Sumatra has raised the alert status for Mt. Talang to the highest level following a 6.9-magnitude earthquake and a series of aftershocks that struck the province.

Vulcanologist Dalipa Marjusi said Tuesday the tremors had sparked a volcanic earthquake and temblors, although eruption of the volcano remained undetected.

“Since Sunday’s earthquake we have recorded 1,600 volcanic quakes and 700 tectonic quakes, but only 23 of them were felt,” Dalipa said.

Fog has blanketed the summit of the 2,597-meter volcano for the last two days, making it difficult to see ash or lava that might be erupting from its crater.

The volcano last spewed hot ash last April.

A seven-strong team from the directorate general of vulcanology and disaster mitigation have arrived in Padang from Bandung to monitor the volcano’s activities.
Source: http://www.thejakartapost.com/news/2009/08/18/authorities-raise-mt-talang-alert-level-highest.html


Talang is the 6th listed volcano from top left.

New activity/unrest:

Source: Global Volcanism Program (GVP) – SI/USGS Weekly Volcanic Activity Report

Notes:

IG reported that on 4 August seismicity from Reventador increased and periods of tremor frequently saturated the seismic stations. On 6 August, incandescent blocks were ejected from the crater. Thermal images revealed a linear area of higher temperatures, confirming the presence of a new lava flow on the S flank.

Based on analyses of satellite imagery, the Washington VAAC reported that on 14 August a 2-hour-long thermal anomaly detected over Pagan was followed by a small emission. The emission, hotter than its surroundings, drifted NW and quickly dissipated. [Source: GVP]

Ongoing Activity:

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VolcanoWatch [27 May 2009]

Posted by feww on May 28, 2009

Volcanic Activity Report: 20 May – 26 May 2009

Source: Global Volcanism program (GVP) – SI/USGS Weekly Volcanic Activity Report

New activity/unrest:

Redoubt Activity – Color Code ORANGE : Alert Level WATCH


Redoubt Volcano lava dome viewed from the southeast. This dome has been slowly growing since April 4, 2009. [Picture Date: May 26, 2009 16:12:26 AKDT – Image Creator: Rick Wessels; Image courtesy of AVO/USGS.

Ongoing Activity:

Latest U.S. Volcano Alerts and Updates for Wednesday, May 27, 2009 7:32 AM HST (Wednesday, May 27, 2009 17:32 UTC)

  • Redoubt Activity – Color Code ORANGE : Alert Level WATCH

  • Kilauea Activity  –  Color Code ORANGE : Alert Level WATCH

  • Veniaminof Activity – Color Code GREEN : Alert Level NORMAL

  • Mauna Loa Activity – Color Code YELLOW : Alert Level ADVISORY

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Volcano Watch No. 46

Posted by feww on November 20, 2008

12 November -18 November 2008

New Activity/Unrest:

AKAN

Country:    Japan
Region :    Hokkaido
Volcano Type:    Caldera
Last Known Eruption:    2006
Summit Elevation:    1499 m
Latitude:    43.384°N     43°23’3″N
Longitude:    144.013°E    144°0’46″E

Ongoing Activity:

This page is updated on Wednesdays, please see the GVP Home Page for news of the latest significant activity.

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Week 31 Volcano Watch

Posted by feww on August 7, 2008

30 July-5 August 2008

Breaking News:

Color Code Purple

Recent activity at the Kilauea volcano has increased atmospheric levels of sulfur dioxide in the districts of Kau and Puna, Hawaii, resulting in a spike of sulfur of 9 parts per million, which is considered to be extremely high. (Source)

New Activity/Unrest:


Kilauea volcano eruption. Photo dated July 14. 2008. Copyright: Steven and Donna O’Meara. Source: HawaiiMagazine.com. See Fair Use Notice!

Ongoing Activity:

[The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.]

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