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 day 21 hours ago

Asosan (Japan) - Report for 27 August-2 September 2014 - NEW

Thu, 09/04/2014 - 5:18am

On 27-29 August JMA reported volcanic earthquakes and elevated lake temperatures at Asosan's Nakadake Crater. On 30 August an eruption occurred with a gray-white plume of indeterminate height due to clouds prompted raising the Alert level to 2. On 31 August- 2 September was a small eruption and a gray white plume rose 800-1200 m above the crater rim. During 30 August-1 September the Tokyo VAAC reported ash plumes that rose 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted N and NE. The Alert Level was raised to 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Bardarbunga (Iceland) - Report for 27 August-2 September 2014 - NEW

Thu, 09/04/2014 - 5:18am

During 27 August-2 September the Icelandic Met Office reported ongoing seismic activity at Bárdarbunga volcano. On 27 August an overflight showed a 4-6-km-long row of cauldrons 10-15 m in diameter S of Bárdarbunga. On 29 August a small fissure eruption started in Holuhraun along an old fissure about 600 m in length north of Dyngjujökull. Lava again erupted starting on 31 August along a 1.5 km long fissure. The Aviation Color Code was raised to Red and lowered to Orange later in the day. On 1-2 September a white steam and gas plume rose 4.5 km (15,000 ft) a.s.l. and drifted 60 km to NNE and ENE. Lava flowed N and lava plumes rose tens of meters. There was a noticeable decrease in seismicity from 500 earthquakes on 1 September to 300 earthquakes on 2 September. Earthquakes up to magnitude 4-5.4 have been detected at or near the volcano. On 2 September the lava had covered 4.2 square kilometers and was 4.5 km from the glaciers edge. The London VAAC reported no ash plumes associated with the fissure eruptions. The Aviation Color Code remains at Orange.

Sources: Icelandic Met Office ,London Volcanic Ash Advisory Centre (VAAC)

Rabaul (Papua New Guinea) - Report for 27 August-2 September 2014 - NEW

Thu, 09/04/2014 - 5:18am

On 29 August the Darwin VAAC changed the Aviation Color Code to Red after ash plumes from Rabaul caldera's Tavurvur cone rose to 18.3 km (60,000 ft) a.s.l. On 30 August the ash plume rose to 2.1 km (7,000 ft) a.s.l., and the Aviation Color Code was lowered to Orange. On 29 August ABC News reported evacuations of communities near the volcano.

Sources: ABC News - American Broadcasting Corporation,Darwin Volcanic Ash Advisory Centre (VAAC)

Suwanosejima (Japan) - Report for 27 August-2 September 2014 - NEW

Thu, 09/04/2014 - 5:18am

During 28 August-1 September, the Tokyo VAAC reported eruptions at Suwanosejima. Ash plumes rose 1.8-2.7 km (6,000-9,000 ft) a.s.l. and drifted E, SE, S, and NE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

Bagana (Papua New Guinea) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 25-28 August the Darwin VAAC reported ash plumes at Bagana that rose 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted 35-65 km W, SW and WNW. The Aviation Color Code remained at Orange.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Kuchinoerabujima (Japan) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

JMA reported that during 27 August-2 September few volcanic earthquakes were accompanied by no explosion at Kuchinoerabujima. On most days a white plume rose 50-300m above the crater rim . The Alert Level for Kuchinoerabujima remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Kusatsu-Shiranesan (Japan) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

On 27-29 August, JMA reported continuing volcanic earthquakes at Kusatsu-Shiranesan’s crater, although they had decreased from early August and tremor was absent. The Alert Level remains at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Mayon (Philippines) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 27 August-2 September PHIVOLCS reported no incandescence from Mayon, despite the emergence of a summit dome, slight ground deformation, and increased volcanic gas emission. Precise leveling surveys measured the third week of August showed inflationary changes in the edifice since a survey in February 2014. On most days seismic instruments recorded several rock falls and a few earthquakes. Observers noted moderate emission of white steam plumes that drifted SW, WSW, NE, SSW, NNW, WNW, and NW. The Alert Level remained at 2 (on a scale of 0-5).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Sabancaya (Peru) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

IGP reported that on 27 August INGEMMET reported long-period, volcano-tectonic, and hybrid earthquakes at Sabancaya. White to light gray plumes rose 100-300 m above the summit and drifted SE. On 28-29 August the Buenos Aires VAAC reported volcanic ash.

Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC) ,Instituto Geológico Minero y Metalúrgico (INGEMMET)

Fuego (Guatemala) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 27 August-2 September, INSIVUMEH reported that weak to moderate explosions at Fuego expelled blocks up to 800 m above the rim. On most days white plumes rose 200-600 m above the crater; on 28 August it rose to 4.3 km (14,100 ft) above the crater. Ash plumes rose 4.1-4.6 km (13,500-15,100 ft) a.s.l. and drifted 10-15 km NE, E, SE, W, S, and SW. Ashfall was reported in the villages of Morelia (9 km SW), Panimaché (8 km SW), Panimaché II, Sangre de Cristo (8 km WSW), Hagia Sophia, Santa Sofia, Yepocapa, Alotenango, Antigua, and San Miguel Dueñas. On most days rumbling was heard that rattled structures near the volcano. On 30-31 August lava flowed towards Ceniza Canyon. Weak to moderate avalanches of blocks were channeled into the canyons Las Lajas (SE), Ceniza (SSW), Taniluyá (SW), Santa Teresa, and Honda.

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

Reventador (Ecuador) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 27 August-2 September IG reported moderate activity including explosions, long-period earthquakes, harmonic tremor, and tremor at Reventador. On 27 August steam emissions were observed. On most days the volcano was obscured by clouds. On 2 September instruments recorded tremor-related emissions and satellite views showed an ash plume that rose 6 km (19,700 ft) height and drifted W. On 2 September the Washington VAAC reported volcanic ash emissions.

Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG) ,Washington Volcanic Ash Advisory Center (VAAC)

San Miguel (El Salvador) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

On 27 August -2 September SNET reported that seismic activity at San Miguel had decreased significantly from the previous month. Small steam-and-gas plumes did not exceed 200 m above the summit. Views on 29 August were obscured by clouds. On 1 September there was a slight increase in seismicity and gas pulses rose 400 m above the summit.

Source: Servicio Nacional de Estudios Territoriales (SNET)

Shishaldin (United States) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

AVO reported that during 27 August-2 September low-level eruptive activity continued at Shishaldin volcano. On 28 August a thermal feature was observed and on 31 August a small steam plume was seen in satellite images. During clear weather on 1 September no activity was observed. On 2 September elevated surface temperatures at the summit crater were noted from satellite data. Clouds prevented observations the other days of the week. 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 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

KVERT reported that during 22-28 August the moderate explosive eruption continued at Zhupanovsky. On 28 August ash plumes rose to 3.5-4 km (11,500-13,100 ft) a.s.l. and drifted 80 km SW. During 25-27 August satellite data showed a thermal anomaly over the volcano, but clouds prevented observations the other days of the week. The Tokyo VAAC reported that ash plumes rose to 4.3 km (14,000 ft) a.s.l. and drifted SW.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT),Tokyo Volcanic Ash Advisory Center (VAAC)

Santa Maria (Guatemala) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

On 27 August-2 September, INSIVUMEH reported lava flowing towards Upper Nima Canyon I at Santiaguito. On most days collapses of the lava flow generated fine ash that rose 300-2800 m above the crater and drifted SW, S, and W;ash was reported at Finca San José on 28 August. Fumarolic degassing plumes rose 150 -3,000 m above the crater and drifted SW, S, and E. On 30 August lahars left deposits about 1 m thick and 30 m wide, and on 1 September were reported to occasionally overflow in some parts of the Nima 1 river.

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

Pacaya (Guatemala) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

INSIVUMEH reported that during 27 August-2 September white and blueish white fumarolic plumes rose 50-75 m above Mackenney Crater at Pacaya and drifted 400-500 m E, S, W and SW. On 28 August small plumes of gray ash rose 200-600 m above the crater and drifted S and SW.

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

Popocatepetl (Mexico) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

CENAPRED reported that during 27 August-2 September explosions were accompanied by steam-and-gas emissions with minor ash and ash plumes that rose 800-3,000 m above Popocatépetl’s crater and drifted W, SW, and WSW. On most nights incandescence was observed, increasing during times with larger emissions. On 1 September partial visibility due to cloud cover was reported. On 29 and 31 August the Washington VAAC reported discrete ash emissions. The Alert Level remained at to Yellow, Phase Two.

Sources: Centro Nacional de Prevencion de Desastres (CENAPRED),Washington Volcanic Ash Advisory Center (VAAC)

Tungurahua (Ecuador) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 27 August-2 September IG reported that moderate to high eruptive activity continued at Tungurahua including volcanic tremor, explosions, and long-period earthquakes. On most days explosions described as roars and “gunfire” were heard that rattled structures at the observatory and around the volcano. On most days ash plumes rose 1.5-2.5 km (4,900-8,200 ft) a.s.l. above the crater rim and drifted N, W, and NW. On 27-28 August explosions expelled blocks on the W and NW flank that descended 800-1000 m below the crater rim. On 30 August pyroclastic flows decended 1500 m down the NW flank. IG reported nearly constant explosions and pyroclastic flows on 31 August that traversed down the ravines of La Hacienda, Achupashal, and Mandur.

Ubinas (Peru) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

During 27 August-2 September INGEMMET reported that the eruption of Ubinas was continuing. During 27-31 August gas and ash plumes rose 200-1100 m above the crater and drifted E, NE, SE, and S. On 27 August INGEMMET reported increased volcanic tremor which continued until 30 August when the volcanic tremor decreased. On 28 August the Buenos Aires VAAC listed the Aviation Color Code at Red, noting intermittent light ash and possible ongoing emissions.

Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC) ,Instituto Geológico Minero y Metalúrgico (INGEMMET)

Dukono (Indonesia) - Report for 27 August-2 September 2014

Thu, 09/04/2014 - 5:18am

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 28-29 August a low level plume from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 40 km NE and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)