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Posts Tagged ‘Redoubt’

VolcanoWatch Weekly [1 January 2010]

Posted by feww on January 1, 2010

VoW: Redoubt (Again!)

View of Redoubt faintly steaming (plume drifts south [to the left in the photo] from the summit) on December 31, 2009, as seen from near Homer, Alaska. Photograph courtesy of Dennis Anderson, Night Trax Photography. Picture Date: December 31, 2009 12:55:00 AST.

Thursday, December 31, 2009 12:40 PM (Thursday, December 31, 2009 21:40 UTC)

60°29’7″ N 152°44’38” W, Summit Elevation 10197 ft (3108 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

The rate of shallow, small earthquakes at Redoubt Volcano decreased markedly yesterday and remains low. The Aviation Color Code remains YELLOW and the Volcano Alert Level remains ADVISORY.

SI / USGS Weekly Volcanic Activity Report
(23December – 29 December 2009)

New Activity/Unrest

Latest on Mayon Volcano

Volcano News (Source: GVP)

OVSICORI-UNA reported that on 25 December a phreatic eruption from Laguna Caliente, a summit lake of Poás, was seen by visitors standing at a viewpoint to the S of the crater. Lake water mixed with sediment and blocks was ejected 550-600 m above Laguna Caliente.

MVO reported that during 11-19 December activity from the Soufrière Hills lava dome continued at a high level. Frequent pyroclastic flows were noted on the northern flank. Ashfall also occurred on many other Caribbean islands, as far as Puerto Rico (400 km ENE), and disrupted commercial flights. (Source: GVP)

Ongoing Activity

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FEWW Volcanic Activity Forecast

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Posted in Karymsky, San Cristóbal, volcanism, volcano, Volcano Watch | Tagged: , , , , | 1 Comment »

VolcanoWatch Weekly [30 September 2009]

Posted by feww on October 2, 2009

VOW: Golden Trout Creek

A cluster of 66 shocks have rocked a a 15 square km area centered about 36.392°N, 117.861°W, some 41 km east of the Golden Trout Creek volcano field in central California, in the past few days. Although most of the quakes were tremors measuring less than M 3.0, the largest shock measured 5.2.

Volcano Details:

Country:  United States
Region:  California (USA)
Volcano Type: Volcanic field
Volcano Status: Tephrochronology
Last Known Eruption: 5550 BC ± 1000 years
Summit Elevation: 2,886 m  (9,468 feet)
Latitude: 36.358°N   (36°21’30″N)
Source: Global Volcanism Program (GVP)

The Golden Trout Creek volcanic field consists of a group of Quaternary alkali olivine basaltic cinder cones and lava flows in the Toowa valley of the Sierra Nevada about 25 km south of Mount Whitney. Lava flows from the Golden Trout Creek volcanic field erupted through Mesozoic granitic rocks of the Sierra Nevada batholith during several episodes dating back to about 743,000 years ago, when the Little Whitney cinder cone and lava flows were erupted. The South Fork cone was erupted about 176,000 years ago and produced the largest lava flow of the volcanic field, which traveled 10 km to the west, possibly as far as the floor of Kern Canyon. Tunnel cone to the north of South Fork (Red Hill) cone is undated, but its lava flow is overlain by glacial deposits and it is thought to be only slightly younger than South Fork cone. The youngest lava flow, from Groundhog cone, is unglaciated and thought to be about 5-10,000 years old (Moore and Lanphere 1983). The lava flow from Groundhog cone traveled 6 km west down Golden Trout Creek on top of the older flow from South Fork cone.—GVP.  
Photo: Rick Howard, 2002 (courtesy of Del Hubbs, U S Forest Service).

SI /USGS Weekly Volcanic Activity Report
(23 September – 29 September 2009)

New activity/Unrest:

News From GVP:

CVGHM reported that on 26 September a “thunderous” noise from Dieng was heard from 2 km away. The next day, a phreatic eruption from an unspecified crater ejected mud as far away as 140 m S.

KVERT reported that on 17 and 22 September a weak thermal anomaly over Karymsky was detected in satellite imagery. Scientists flying near Karymsky in a helicopter on 22 September saw ash plumes that rose to an altitude of 1.7 km (5,600 ft) a.s.l. and drifted E. —GVP

Ongoing Activity:

Related Links:

FEWW Volcanic Activity Forecast

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Posted in Central Kamchatka, Chaiten, FEWW Volcanic Activity Forecast, island of Java, Karymsky, Kliuchevskoi, Mayon, Sakar, Shiveluch, Socorro, Sumatra, volcanism, volcanoes | Tagged: , , , , , , , , , , , , , , | Leave a Comment »

Weekly Volcano Watch: 16 April 2009

Posted by feww on April 16, 2009

Volcanic Activity Report: 8 April – 14 April 2009

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

New activity/unrest:

VoW: Kaba

Country:  Indonesia
Region:  Sumatra
Volcano Type:  Stratovolcano
Last Known Eruption: 2000
Summit Elevation:  1,952 m (6,404 feet)
Latitude: 3.52°S (3°31’0″S)
Longitude: 102.62°E (102°37’0″E)

Data Source: GVP

Mt. Kaba. Image Source: Mountain. Image may be subject to copyright.

Kaba, a twin volcano with Mount Hitam, has an elongated summit crater complex dominated by three large historically active craters trending ENE from the summit to the upper NE flank. The SW-most crater of 1952-m-high Gunung Kaba, Kawah Lama, is the largest. Most historical eruptions have affected only the summit region of the volcano. They mostly originated from the central summit craters, although the upper-NE flank crater Kawah Vogelsang also produced explosions during the 19th and 20th centuries.
Photo by Setiadarma, 1989 (Volcanological Survey of Indonesia). Caption: GVP.

Ongoing Activity:

Posted in Dukono, Kaba, Kīlauea, Soufrière Hills, Sumatra | Tagged: , , , , | Leave a Comment »

Weekly Volcano Watch: 9 April 2009

Posted by feww on April 9, 2009

Volcanic Activity Report: 1 April – 7 April 2009

Source: SI / USGS Weekly Volcanic Activity Report

New activity/unrest:

VoW: Vesuvius

An aerial photo of Vesuvius. Source: solarnavigator. Image may be subject to copyright.

Country: Italy
Region: Campania
Volcano Type: Somma volcano
Last Known Eruption: 1944
Summit Elevation: 1281 m (4,203 feet)
Latitude: 40.821°N 40°49’17″N
Longitude: 14.426°E 14°25’34″E

One of the world’s most noted volcanoes, Vesuvius (Vesuvio) forms a dramatic backdrop to the Bay of Naples. The historically active cone of Vesuvius was constructed within a large caldera of the ancestral Monte Somma volcano, thought to have formed incrementally beginning about 17,000 years ago. The Monte Somma caldera wall has channeled lava flows and pyroclastic flows primarily to the south and west. Eight major explosive eruptions have taken place in the last 17,000 years, often accompanied by large pyroclastic flows and surges, such as during the well-known 79 AD Pompeii eruption. Intermittent eruptions since 79 AD were followed by a period of frequent long-term explosive and effusive eruptions beginning in 1631 and lasting until 1944. The 1631 eruption was the largest since 79 AD and produced devastating pyroclastic flows that reached as far as the coast and caused great destruction. Many towns are located on the volcano’s flanks, and several million people live within areas potentially affected by eruptions of Vesuvius. Photo by Dan Dzurisin, 1983 (U.S. Geological Survey). Caption: GVP.

[Note: A somma volcano is a volcanic caldera in which a new cone  has grown. The name comes from Mount Somma, a stratovolcano that hosts the cone of Mount Vesuvius. Other examples of somma  include volcanoes on  Kamchatka Peninsula (Russia) and the Kuril Islands that extend from Kamchatka to the island of  Hokkaido, Japan.]

Index of monthly reports (GVP)

Vesuvius Eruption photographed in March 1944. Image: John Reinhardt, USAAF.

FEWW Forecast: There is at least a 0.6 probability that Vesuvius may erupt by August/September 2009.

Ongoing Activity:

Posted in Batu Tara, Galeras, Kīlauea, Sakura-jima, Somma volcano | Tagged: , , , , | 2 Comments »

Weekly Volcano Watch: 26 March 2009

Posted by feww on March 26, 2009

Volcanic Activity Report: 18 March – 24 March 2009

Source: SI / USGS Weekly Volcanic Activity Report

New activity/unrest:

VoW: Fonualei, Tonga Islands (SW Pacific)

  • Country: Tonga
  • Subregion Name: Tonga Islands
  • Volcano Type: Stratovolcano
  • Volcano Status: Historical
  • Last Known Eruption: 1957
  • Summit Elevation: 180 m (591 feet)
  • Latitude: 18.02°S  (18°1’0″S)
  • Longitude: 174.325°W  (174°19’30″W)
  • Source: USGS

Fonualei:  Seen from the NE, Fonualei volcano has an upturned saucer profile. The small, less than 2-km-wide island of Fonualei contains a fumarolically active crater, which is breached to the SW with a fresh lava flow extending to the sea and forming a rugged shoreline. Blocky lava flows from a central pyroclastic cone have reached the sea through notches in the rim of a small caldera. Eruptions at Fonualei have been recorded since 1791, with the two largest taking place in October 1846 and July 1847. [In 1847,] explosive eruptions produced large pumice rafts, and ashfall damaged crops on the island of Vavua (56 km away) and fell on vessels up to 950 km distant. In 1939 explosive and effusive activity occurred from summit and flank vents, and water spouts were reported 1.6 km SE of the island. Photo by Paul Taylor (published in Taylor and Ewart, 1997). Caption: GVP

FEWW Comment: Fonualei may be one of the next volcanoes in the Tonga region to erupt in the next 30-90 days.

Ongoing Volcanic 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.

Elevated Volcanic Activity in the US [Source: USGS]

Mar 25, 2009 at 21:08:47 PDT [PDT is 7 hours behind of Coordinated Universal Time,UTC]

The following U.S. volcanoes are known to be above normal background (elevated unrest or eruptions) or have shown activity that warranted an Information Release (for example, an earthquake swarm).

Volcano Alert Levels & Aviation Color Codes defined at

Volcano Hazards

Redoubt: Alert Level=WATCH. Aviation Color Code=ORANGE. As of Mar 25, 2009, 13:35 ADT

  • No explosions in last 36 hours and seismicity has declined. Possible lava dome growth at the summit. Explosions could resume without much warning.
    (Change to current status occurred on Mar 25, 2009 13:35 ADT from Alert Level WARNING and Aviation Color Code RED )For more information see

Kilauea: Alert Level=WATCH. Aviation Color Code=ORANGE. As of Mar 25, 2009, 07:53 HST

  • Elevated SO2 and some tephra from Halema`uma`u vent; elevated SO2 from Pu`u `O`o vent; lava in tubes to ocean. (Change to current status occurred on Jul 2, 2007 20:09 HST from Alert Level ADVISORY and Aviation Color Code YELLOW ). For more information see

Cleveland: Alert Level=ADVISORY. Aviation Color Code=YELLOW. As of Mar 24, 2009, 12:46 ADT

Mauna Loa: Alert Level=ADVISORY. Aviation Color Code=YELLOW. As of Mar 2, 2009, 15:05 HST

Program Webcams page links to webcams at 19 of the 169 active volcanoes in the U-S.

Posted in ashfall, Chaiten, Fonualei, Kīlauea, volcanism | Tagged: , , , | Leave a Comment »

Redoubt Erupts

Posted by feww on March 23, 2009

Redoubt volcano:
Aviation Color Code – RED
Volcano Alert Level – WARNING

On 2009-03-23 at 02:04:08 (10:04:08UTC) AVO said:

As of 2:00AM March 23, 2009, AVO has recorded FOUR large explosions at Redoubt volcano at the following times:

  • March 22 10:38PM
  • March 22 11:02PM
  • March 23 12:14AM
  • March 23 01:39AM

[Add 8 hrs to get time in UTC]

The National Weather Service has issued an Ashfall Advisory. Link:

Crater showing rapidly melting glacier and enlarged “ice piston” feature. Picture Date: March 21, 2009. Image Creator: Cyrus Read. Image courtesy of AVO/USGS.

Top vent in the Redoubt summit crater. Picture Date: March 21, 2009. Image Creator:  Cyrus Read. Image courtesy of AVO/USGS.

Looking south at the north flank of Redoubt volcano. Ashfall limited to south crater floor, rim, and extending south-southeast. Source of ash is a vent south of the 1990 dome at an elevation of ~8300 ft. (~2, 530m). Picture Date: March 15, 2009 –  Image Creator:  Heather Bleick. Image courtesy of AVO/USGS.

AVO/USGS Volcanic Activity Notice

  • Volcano: Redoubt (CAVW #1103-03-)
  • Current Volcano Alert Level: WARNING
  • Current Aviation Color Code: RED

Issued: Sunday, March 22, 2009, 11:26 PM AKDT (20090322/0726Z)
Source: Alaska Volcano Observatory (AVO)
Notice Number: 2009/A12
Location: N 60 deg 29 min W 152 deg 44 min
Elevation: 10197 ft (3,108 m)
Area: Cook Inlet-South Central Alaska

Volcanic Activity Summary: The eruption of Mt. Redoubt continues. The height of the eruption cloud is estimated to be 50,000 ft above sea level. Further reports will be issued as more information becomes available.

Recent Observations:
[Volcanic cloud height] The height of the eruption cloud is estimated to be 50,000 ft above sea level. Further reports will be issued as more information becomes available.
[Other volcanic cloud information] Nil
[Mudflow] Mudflows are possible on Drift and Crescent Rivers.
[Ash fall] Ashfall likely in the vicinity of and downwind from the volcano.

Location of Redoubt volcano, in relationship to surrounding towns, roads, and other volcanoes. Image
Date: September 26, 2008. Image Creator: Janet Schaefer. Image courtesy of the AVO/ADGGS.

Contacts: Tom Murray, Scientist-in-Charge, USGS (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF (907) 474-7131

Mount Redoubt rises to 3108 m on the west side of Cook Inlet, 170 km SW of Anchorage. Redoubt volcano was constructed over a basement of glacially eroded Mesozoic granitic rocks, seen here in the foreground. The volcano has been very active during the Holocene, producing at least 30 tephra layers in the Cook Inlet basin stratigraphy. A steam plume rises from the summit crater, which is breached to the north, in this view from the NW following its 1989-90 eruption. Iliamna volcano is visible in the left distance. Photo by Christina Neal (U.S. Geological Survey, Alaska Volcano Observatory). Caption GVP.

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

240 AM AKDT MON MAR 23 2009






Redoubt Ashfall – Current trajectory model. NOAA/NWS FO

Webcam image – dated March 15, 2009.  AVO/USGS

Live webcam images of various Alaskan volcanoes

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Posted in explosions at Redoubt, SKWENTNA, Susitna Valley, Talkeetna, Willow | Tagged: , , , , | Leave a Comment »

Volcano Watch: 17 February 2009

Posted by msrb on February 19, 2009

Volcanic Activity Report: 11 February – 17 February 2009

Source: SI / USGS Weekly Volcanic Activity Report

New activity/unrest:

Volcano of the Week: Ebeko

Country:    Russia
Region   :    Kuril Islands

Volcano Type:     Somma volcano
Last Known Eruption:     2005
Summit Elevation:   1,156 m     (3,793 feet)
Latitude:     50.68°N     (50°41’0″N)
Longitude:     156.02°E    (156°1’0″)

An ash-bearing eruption column rises above the North crater of Ebeko volcano on September 9, 1989. An explosive eruption that began on February 2, 1989 continued until April 1990. Three summit craters located along a SSW-NNE line form Ebeko volcano proper, which occupies the northern end of a complex of five volcanic cones at the northern end of Paramushir Island. Historical activity, recorded since the late-18th century, has been restricted to small-to-moderate explosive eruptions from the summit craters. Photo courtesy of Kamchatka Volcanic Eruptions Response Team, 1989. Caption: GVP

The Tokyo VAAC reported an ash plume which drifted NE from Ebeko at an altitude of 0.6 km. Another ash plume was detected drifting SW at an altitude of 1.2 km ft.

Geologic Summary. The flat-topped summit of the central cone of Ebeko volcano, one of the most active in the Kuril Islands, occupies the northern end of Paramushir Island. Three summit craters located along a SSW-NNE line form Ebeko volcano proper, at the northern end of a complex of five volcanic cones. The eastern part of the southern crater of Ebeko contains strong solfataras and a large boiling spring. The central crater of Ebeko is filled by a lake about 20 m deep whose shores are lined with steaming solfataras; the northern crater lies across a narrow, low barrier from the central crater and contains a small, cold crescentic lake. Historical activity, recorded since the late-18th century, has been restricted to small-to-moderate explosive eruptions from the summit craters. Intense fumarolic activity occurs in the summit craters of Ebeko, on the outer flanks of the cone, and in lateral explosion craters. GVP

Ongoing Activity:

Posted in Arenal, fumarolic activity, Kamchatka, Paramushir Island, Shishaldin | Tagged: , , , , | Leave a Comment »