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: 6 weeks 3 days ago

Chiles-Cerro Negro (Colombia-Ecuador) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

Based on reports from Observatorio Vulcanológico and Sismológico de Pasto (SGC-OVSP), and the Instituto Geofísico de la Escuela Politécnica Nacional (IGEPN), on 26 October Servicio Geológico Colombiano (SGC) stated that seismic activity at Cerro Negro de Mayasquer and Chiles volcanoes continued at a high rate. Since 29 September 2014 about 81,000 earthquakes had been detected with 6,300 of those events occurring on 25 October. The epicenter was 2-3.5 km S of Chiles. Interferometry (INSAR) and a high resolution GPS network both showed localized deformation S of Chiles. The Alert Level remained at Orange (level 3 of 4). A news article from 23 October noted that 3,500 families had been evacuated from the Chiles, Panam, and Mayasquer communities.

Sources: Colombia Reports ,Servicio Geológico Colombiano (SGC)

Asosan (Japan) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

JMA reported that a period of tremor from a very small eruption at Asosan was recorded late at night on 22 October through early the next morning. The video camera near the crater had ash adhered to it. During a field survey on 24 October volcanologists observed ashfall around Nakadake Crater. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Copahue (Chile-Argentina) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

On 24 October SERNAGEOMIN reported a continuing downward trend of seismicity at Copahue and that emissions had become more diffuse with only minute amounts of tephra in some plumes. A small mud lake had also formed in the crater. SERNAGEOMIN lowered the Alert Level to Yellow and recommended no entry into a restricted area within 3 km of the crater. ONEMI maintained Level Yellow for Alto Biobío (40 km W) in the Biobío region (since 3 June 2013).

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

Ontakesan (Japan) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

JMA reported that cloud cover often prevented visual observations of Ontakesan during 22-28 October; white plumes were periodically observed rising 100-300 m above the crater rim and drifting E and SE. Seismicity remained low. The Alert Level remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Sinabung (Indonesia) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

Based on webcam views, wind data models, and satellite images, the Darwin VAAC reported that during 23-27 October ash plumes rose from Sinabung. During 23-24 October ash plumes drifted 15-40 km N and SW. A small eruption observed on the webcam on 25 October produced a minor amount of ash that drifted SW; a later ash plume drifted almost 30 km WNW. The next day another eruption generated an ash plume that drifted E. Ash emissions on 27 October were recorded by the webcam. The VAAC noted that PVMBG reported an ash plume that rose to an altitude of 5.5 km (18,000 ft) a.s.l. and then dissipated. On 27 October BNPB reported that activity at Sinabung remained high; on 26 October pyroclastic flows traveled 3.5 km S and avalanches occurred multiple times. Hot ash clouds rose 2 km. The report stated that 3,284 people from 1,018 families remained in evacuation shelters.

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

Bardarbunga (Iceland) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

JMA reported that a period of tremor from a very small eruption at Asosan was recorded late at night on 22 October through early the next morning. The video camera near the crater had ash adhered to it. During a field survey on 24 October volcanologists observed ashfall around Nakadake Crater. The Alert Level remained at 2 (on a scale of 1-5).

Source: Icelandic Met Office

Mayon (Philippines) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

PHIVOLCS reported that during 22-28 October white plumes rose from Mayon's crater and drifted SW, WSW, WNW, and NW. A few volcanic earthquakes and rockfall signals were recorded during 23-25 and 28 October. Weak crater incandescence from the crater was noted at night on 22, 25, and 27 October. The Alert Level remained at 3 (on a 0-5 scale).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Sabancaya (Peru) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

IGP reported that during 21-27 October seismic activity at Sababcaya was low, and sporadic white and blue plumes rose as high as 1.2 km. Although a pilot reported an ash plume drifting E on 23 October, the Buenos Aires VAAC reported that ash was not detected in satellite images. The webcam showed gas-and-steam emissions, likely with diffuse ash, dissipating near the summit. On 25 October a pilot reported ash drifting E, but again satellite images did not detected ash.

Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC) ,Instituto Geofísico del Perú (IGP)

Shishaldin (United States) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

AVO reported that partly cloudy satellite images and mostly cloudy webcam views showed nothing unusual at Shishaldin during 21-24 October. Seismicity increased on 25 October, and was followed by a tremor event and elevated surface temperatures detected at the summit in satellite images. Tephra deposits at the summit were noted in clear webcam images on 26 October, indicating that the event was energetic enough to eject material onto the flank from a depth of several hundred meters within the summit crater. 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 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

KVERT reported that an eruption at Zhupanovsky likely continued during 17-24 October. Satellite images were obscured by clouds. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Santa Maria (Guatemala) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

INSIVUMEH reported that during 22-23 October avalanches originated from the lava-flow front active on the S flank of Santa María's Santiaguito lava-dome complex. Phreatic explosions occurred at the middle and lower parts of the lava flow. On 24 October a lahar descended the San Isidro (SW) drainage, a tributary of the Tambor River, carrying blocks 1-2 m in diameter. During 25-26 October a dense white plume rose 500 m and drifted SW. The most active part of the lava flow advanced S down the Nima I drainage. Another part had advanced 3 km E and was active in the San José finca. Block avalanches were produced from the lava-flow fronts.

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

Popocatepetl (Mexico) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

CENAPRED reported that during 22-28 October seismicity at Popocatépetl indicated continuing emissions of water vapor, gas, and small amounts of ash. Incandescence from the crater was observed at night. A small explosion at 0317 on 25 October ejected tephra 100 m onto the S flank. A steam-and-gas plume containing a small amount of ash rose 1.5 km above the crater and drifted SW. Ashfall was reported in Tetela del Volcán (20 km SW). An explosion at 0111 on 26 October ejected tephra 200 m onto the N flank. A steam-and-gas plume with diffuse ash rose 1.1 km and drifted NW. On 28 October an ash plume drifted WSW. The Alert Level remained at to Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Dukono (Indonesia) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 28 October ash plumes from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted almost 85 km E.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

JMA reported that two explosions from Showa Crater at Aira Caldera’s Sakurajima volcano were detected during 20-24 October; an explosion on 24 October generated a plume that rose 3.2 km. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that on 24 October ash plumes rose to altitudes of 3-4.6 km (10,000-15,000 ft) a.s.l. and drifted E. During 25-26 October plumes rose to altitudes of 2.4-2.7 km (8,000-9,000 ft) a.s.l. and drifted E. On 28 October plume rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted S.

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

Kilauea (United States) - Report for 22 October-28 October 2014 - NEW

Tue, 10/28/2014 - 11:37pm

During 22-28 October HVO reported that Kilauea’s 27 June NE-trending lava flow continued to be active. On 22 October a narrow lava flow (less than 50 m wide) that had overtaken the flow front during the previous few days moved into a small gully; the advancement rate was variable and sometimes as high as 300 m/day. Another breakout upslope continued to advance at a slower rate. On 24 October HVO scientists aboard an overflight measured the cross sectional area of the lava tube feeding the flow; the measurement suggested that the volume of lava being supplied to the flow from the Pu'u 'O'o vent had slightly increased. At approximately 0350 on 25 October lava crossed Apa’a Street and continued to advance towards Pahoa town. Throughout the morning the flow moved down the Pahoa cemetery driveway and then turned SE into adjoining pasture. At 0900 on 26 October the flow was an estimated 140 m wide. The next day it had narrowed to 100 m wide and was about 570 m from Pahoa Village Road. At about 0200 on 28 October the flow had reached the first occupied residential property. The leading edge of the flow was less than 50 m wide but increased to 150 m upslope. At 1730 the lava flow was 310 m in a straight-line distance from Pahoa Village Road and about 900 meters in a straight-line distance from Highway 130. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Warning. According to news articles, Pahoa town, residence to 800-900 people, consists of small shops and homes. A school and a few roads were closed. Crews were building temporary access roads and trying to build berms to divert lava away from the highly traveled Highway 130. The circulating lava lake occasionally rose and fell in the deep pit within Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts tephra 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.

Sources: CBC,CNN ,US Geological Survey Hawaiian Volcano Observatory (HVO)

Sheveluch (Russia) - Report for 22 October-28 October 2014

Tue, 10/28/2014 - 11:37pm

KVERT reported that during 17-24 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 17, 20, and 22 October; cloud cover prevented views of the volcano on the other days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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

Wed, 10/08/2014 - 12:40am

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)

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

Wed, 10/08/2014 - 12:40am

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 - 12:40am

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

Source: Toulouse Volcanic Ash Advisory Centre (VAAC)

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

Wed, 10/08/2014 - 12:40am

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)