OREGON STATE UNIVERSITY

GVP Eruption Reports

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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. Updated by 2300 UTC every Wednesday, these notices are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of eruptions during the week, but rather a summary of activity that meet selected criteria. Carefully reviewed, detailed reports are published monthly in the Bulletin of the Global Volcanism Network. The World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.
Updated: 1 week 6 days ago

Lewotobi (Indonesia) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

Based on analysis of satellite images and wind data, the Darwin VAAC reported that on 6 October a narrow, low-level ash plume from Lewotobi rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 185 km WNW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Asosan (Japan) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

JMA reported that Alert Level 2 at Asosan continued during 29 September-3 October. A persistent white plume rose 600 m above the crater. Incandescence from Nakadake Crater was visible during 29-30 September. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Karymsky (Russia) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

KVERT reported that a four-minute long explosion from Karymsky was detected by the seismic network beginning at 1115 on 4 October. Pilots observed an ash plume that rose to an altitude of 3 km (10,000 ft) a.s.l. The Aviation Color Code remained at Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Stromboli (Italy) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

Based on a SIGMET notice, the Toulouse VAAC reported low-level ash from Stromboli on 30 September.

Source: Toulouse Volcanic Ash Advisory Centre (VAAC)

Copahue (Chile-Argentina) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

The Buenos Aires VAAC reported that during 6-7 October diffuse steam-and-gas emissions from Copahue detected in satellite images contained a small amount of ash. The webcam showed that the emission source was near the summit.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Ontakesan (Japan) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

JMA reported that ash emissions from Ontakesan likely continued during 1-7 October. The plume height could not be determined due to poor visibility although on 7 October observers noted that the plume rose 300 m above the crater rim and drifted E. Seismic levels fluctuated; tremor continued to be detected. A news article from 8 October noted that the number of people killed in the 27 September eruption had reached 55; nine were still missing. The Alert Level remained at 3 (on a scale of 1-5).

Sources: Japan Meteorological Agency (JMA) ,RIA Novosti

Sinabung (Indonesia) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

Based on reports from PVMBG, BNPB reported four eruptions from Sinabung on 5 October. The first one occurred at 0146, and produced a pyroclastic flow that traveled 4.5 km S and an ash plume that rose 2 km. The next three events, at 0638, 0736, and 0753, all generated pyroclastic flows that traveled 2.5-4.5 km S. The fourth event also produced an ash plume that rose 3 km. A news article stated that pyroclastic flows from a fifth event at 0900 were smaller, but again traveled 4.5 km after a sixth event at 1200. According to the Darwin VAAC a low-level eruption recorded by the PVMBG webcam generated a pyroclastic flow on 6 October; some of the ash rose higher and drifted E. The Jakarta MWO noted that an ash plume rose to an altitude of 5.2 km (17,000 ft) a.s.l. and drifted S on 7 October. Cloud cover prevented satellite observations. A news article posted on 8 October noted that eruptions in the previous four days caused some evacuations.

Sources: Badan Nacional Penanggulangan Bencana (BNPB) ,Darwin Volcanic Ash Advisory Centre (VAAC),NBC News

Bardarbunga (Iceland) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

During 1-7 October, IMO maintained Aviation Colour Code Orange due to continued activity at Bárdarbunga’s Holuhraun eruptive fissure. Subsidence of the Bárdarbunga caldera continued. Seismic activity at the N part of the dyke and around the vents declined, although the lava field continued to grow and lava production continued at the same output. On 5 October a new lava front at the S edge of the main lava flow advanced E.

Source: Icelandic Met Office

Kuchinoerabujima (Japan) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

JMA reported that no eruptions occurred from Kuchinoerabujima during 29 September-3 October. White plumes rose 600 m above the crater. Low-level seismicity continued and tremor was absent. The Alert Level remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Mayon (Philippines) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

PHIVOLCS reported that during 1-7 October the seismic network at Mayon recorded 0-7 rockfall events per day. White steam plumes drifted SSE, ESE, and NW. Alert Level remained at 3 (on a 0-5 scale).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Shishaldin (United States) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

AVO reported that seismicity at Shishaldin indicated that a low-level eruption likely continued during 1-7 October. Strongly elevated surface temperatures at the summit were periodically detected in satellite images; cloud cover sometimes obscured satellite and webcam observations. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Zhupanovsky (Russia) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

KVERT reported that an explosive eruption at Zhupanovsky continued during 26 September-3 October. Satellite images detected a thermal anomaly on 27 September, and ash plumes that rose to altitudes of 4-4.5 km (13,000-14,800 ft) a.s.l. and drifted 205 km E on 28 September. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Tungurahua (Ecuador) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

IG reported that during 1-7 October visual observations of Tungurahua were limited due to cloud cover. A small ash emission drifted W on 1 October and a plume with low ash content rose 1 km on 6 October. Ashfall was reported in El Manzano (8 km SW) and Choglontus (SW) on 1 October, in El Manzano, Chontillo, and Ambato (31 km N) on 3 October, and in Pillate (8 km W) on 6 October.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Dukono (Indonesia) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 1 October an ash plume from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 45 km NE. During 5-7 October ash plumes rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 55-110 km E and ENE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

JMA reported that five explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m from the crater during 29 September-3 October. Incandescence from Showa Crater was visible at night during 2-3 October. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that during 2-7 October plumes rose to altitudes of 1.2-3.7 km (4,000-12,000 ft) a.s.l. and drifted in multiple directions. On 2 October a pilot observed an ash plume that rose to an altitude of 3 km (10,000 ft) a.s.l.

Sources: Japan Meteorological Agency (JMA) ,Tokyo Volcanic Ash Advisory Center (VAAC)

Kilauea (United States) - Report for 1 October-7 October 2014

Wed, 10/08/2014 - 1:40am

During 1-7 October HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas; smaller particles may have been dropped several kilometers away. At Pu'u 'O'o Crater, glow emanated from several outgassing openings in the crater floor. The 27 June NE-trending lava flow remained active; flows that had broken out upslope from the leading but stalled front had overtaken that front by 1 October. By 6 October the115-m-wide flow was advancing at a rate of about 120 m/day and was 1.2 km upslope from Apa`a Street. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Warning.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Sheveluch (Russia) - Report for 1 October-7 October 2014 - NEW

Wed, 10/08/2014 - 1:40am

KVERT reported that during 26 September-3 October lava-dome extrusion onto Sheveluch’s N flank was accompanied by ash explosions, incandescence, hot avalanches, and fumarolic activity. Satellite images detected a thermal anomaly over the dome during 27-29 September and 2 October. Two explosions on 2 October generated ash plumes that rose to an altitude of 4 km (13,100 ft) a.s.l. and drifted 220 km WSW. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Ambrym (Vanuatu) - Report for 24 September-30 September 2014

Wed, 10/01/2014 - 12:47am

On 1 October the Vanuatu Geohazards Observatory reported a slight increase in activity from Ambrym. The Alert Level remained at 2 (on a scale of 0-4).

Source: Vanuatu Geohazards Observatory

Sabancaya (Peru) - Report for 24 September-30 September 2014

Wed, 10/01/2014 - 12:47am

IGP and INGEMMET reported that during 24-30 September seismicity at Sabancaya remained elevated; long-period, volcano-tectonic, and hybrid earthquakes were detected. White gas emissions rose as high as 1 km above the crater and drifted SE. The plumes were grayish from ash on 26 and 29 September.

Sources: Instituto Geofísico del Perú (IGP),Instituto Geológico Minero y Metalúrgico (INGEMMET)

Santa Maria (Guatemala) - Report for 24 September-30 September 2014

Wed, 10/01/2014 - 12:47am

INSIVUMEH reported that on 24 September heavy rainfall triggered a hot lahar that descended the Cabello de Ángel River, a tributary of the Nimá I river drainage on the S flank of Santa María's Santiaguito lava-dome complex. The lahar carried tree trunks and branches, had a strong sulfur odor, and was 18 m wide and 2 m deep. During 27-28 and 29-30 September lava flows traveled down the S flank and steam plumes rose 400-500 m and drifted 600-800 m SW.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)