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: 51 min 10 sec ago

Bezymianny (Russia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

KVERT reported that during 11-18 July, weak seismicity and weak to moderate gas-and-steam emissions were observed at Bezymianny. On 17 July satellite data showed a thermal anomaly over the volcano, but the view was obscured by clouds other days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Fuego (Guatemala) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

During 16-22 July, INSIVUMEH reported moderate to strong explosions at Fuego with incandescent blocks being expelled 200-500 m above the crater. On July 22 the explosions also ejected gray ash. Most days weak avalanches moved down the flanks. Light gray eruption columns reported on 16 July rose 4-4.5 km (13,100-14,800 ft) a.s.l. and drifted 7-10 km W, SW, WSW, E, and NE. Weak white fumarolic plume rose 200-300 m above Fuego’s summit crater. A special bulletin on 18 July noted an increased number of explosions and a change in the eruptive pattern. Rumbling and jetting sounds often accompanied moderate to strong explosions that produced shock waves 12-15 km away and rattled structures in Panimache and Morelia on the flanks.

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

Reventador (Ecuador) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

IG reported moderate seismicity including explosions, long-period earthquakes, harmonic tremor, and tremor, though cloud cover mostly prevented observations of Reventador during 16-21 July. On 18 July IG noted an emission that rose to 800 m above the crater, and on 22 July a minor ash emission also rose 800 m above the crater; both drifted SW.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

San Miguel (El Salvador) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

SNET reported elevated seismic activity at San Miguel on 17, 19, 20, and 22 July. RSAM had increased significantly. SO2 flux measurements indicated variability in air quality, which at times reached unhealthy levels.

Source: Servicio Nacional de Estudios Territoriales (SNET)

Shishaldin (United States) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

AVO reported that during 16-22 July low-level eruptive activity continued at Shishaldin volcano. Elevated surface temperatures at the summit were detected from satellite data daily, slightly increasing 18 July. Steaming from the summit crater was visible in satellite imagery on 16 July. Web-camera images were mostly obscured due to clouds. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Slamet (Indonesia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 18 July a low level plume from Slamet rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted 83 km W and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Zhupanovsky (Russia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

KVERT reported that on 15 July moderate gas-and-steam activity was observed at Zhupanovsky. On 16-17 July satellite data showed ash plumes that rose to 6-6.5 km (19,700-21,300 ft) a.s.l. and extended about 370 km N. A thermal anomaly was observed over the volcano on 16 July. The Tokyo VAAC reported ash plumes during 16-18 and 21 July drifting N and NE. Plume altitudes were in the range of 3.3-8.5 km (11,000-28,000 ft) a.s.l.

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

Santa Maria (Guatemala) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

INSIVUMEH reported that on most days during 15-22 July the active lava dome of Santiaguito was visibly degassing and generating plumes. Ash was noted on16 and 20 July rising up to 3.2 km (10,500 ft) a.s.l. and tendeding to drift SW. On most days, fumarolic colums reached 2.8-3.2 km (9,200-10,500 ft) a.s.l. and weak to moderate avalanches flowed towards Canyon Nima River I. A moderate explosion occurred 16 July, and ashfall was reported in the Finca El Rosario Palajunoj.

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

Pacaya (Guatemala) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

INSIVUMEH reported that during 16-22 July, white to white-and-blue fumarolic plumes rose 50-75 m above Mackenney Crater at Pacaya and drifted up to 600 m W, SW, and S.

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

Popocatepetl (Mexico) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

CENAPRED reported that during 16-22 July, steam and gas emission rose 200-700 m above Popocatépetl’s crater and drifted NE, N, NW, W, and WSW. Slight nighttime incandescence was observed. The Alert Level remained at to Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Tungurahua (Ecuador) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

During 16-21 July IG reported that Tungurahua had low levels of seismicity and cloudy conditions. On 22 July the IG reported clear weather and observed a steam column that rose tens of meters above the crater.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Ubinas (Peru) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

During 16-22 July INGEMMET and IGP reported that the eruption of Ubinas was continuing with gas-and-ash emissions reported most days. An explosion on 17 July, preceded by several days of banded tremor, generated an eruption column that rose 5 km above the summit and expelled incandescent blocks onto the flanks. More explosions on 19 and 21 produced eruption columns of gas-and-ash; the column on 19 July rose 2.8 km above the summit. Emissions and exhalations on 16, 18, and 22 July of gas-and-ash rose to 200-1800 m above the summit. Eruption columns and emissions drifted mostly E, NE, and SE. There were no significant emissions on 20 July. Ashfall was reported in various towns downwind of the plumes, in the areas of Querapi (4 km S), Ubinas (6.5 km SSE), Tonohaya (7 km SSE), San Miguel (10 km SE), Escacha, Yalahua, Lloque, and Sacuhaya.

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

Dukono (Indonesia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 17 July a low level plume from Dukono rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 55 km NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

JMA reported that seven explosive eruptions from Showa Crater at Aira Caldera’s Sakurajima volcano during 14-22 July ejected ballistics 500-800 m from Showa crater. In general, volcanic earthquakes decreased and tremor increased. The Tokyo VAAC reported that during 16-20 July plumes rose to an altitude of 2-3 km (7,000-10,000 ft) a.s.l. and drifted E and SE; on 22 July a plume rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted N. The Alert Level remained at 3 (on a scale of 1-5).

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

Karymsky (Russia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

KVERT reported weak to moderate seismic activity indicating that Strombolian activity continued at Karymsky during 11-18 July. Satellite views were obscured by clouds or the imagery showed no activity. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Kilauea (United States) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

During 16-22 July 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. A 27 June breakout of lava flowed in an incipient lava tube from the vent to the gentle break in slope at the base of Pu`u `O`o, and continued slowly moving in two main lobes that extended about 2 km NE. Two small lava ponds within cones are present within the two southeastern pits in the crater floor, and glow above two other pits indicated lava is near the surface.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Shiveluch (Russia) - Report for 16 July-22 July 2014

Wed, 07/23/2014 - 9:11am

KVERT reported that during 11-18 July lava-dome extrusion onto Shiveluch’s SE flank was accompanied by moderate ash explosions, incandescence of the dome summit, hot avalanches, and fumarolic activity. Satellite data showed a thermal anomaly over the volcano on 16-17 July. An eruption was reported to 8.2 km (27,000 ft) a.s.l. on 18 July. The Aviation Color Code remained at Orange.

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