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Smithsonian/USGS Weekly Volcanic Activity Report 1-7 June 2011 9 June 2011

Posted by admin in activity reports, Aso, Batu Tara, Chile, Dieng Volcanic Complex, Dukono, eruptions, Hawaii, Indonesia, Japan, Kamchatka, Karangetang, Karymsky, Kilauea, Kizimen, Kliuchevskoi, Pacific, Papua New Guinea, Popocatépetl, Puyehue, Rabaul, Russia, Sakura-jima, Shiveluch, United States, Vanuatu, Villarrica, Weekly Volcanic Activity Reports, Yasur.
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The Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report, compiled by Sally Kuhn Sennert, has been issued for the week 1-7 June 2011. It’s been a lively volcanic week – highlights include:

  • Dieng Volcanic Complex: carbon dioxide emissions and seismicity both remain elevated
  • Popocatépetl: ash plumes reaching altitudes between 1 and 3 km create ashfall in nearby regions
  • Puyehue-Cordón Caulle: an eruption began on 4 June following intense seismicity
  • Kilaeua: two lava lakes were active during 1-7 June

SI/USGS Weekly Volcanic Activity Report 1-6 June 2011

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 1-7 June 2011 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Aso (Japan), Dieng Volcanic Complex (Indonesia), Kliuchevskoi (Russia), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Yasur (Vanuatu).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Karangetang [Api Siau] (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Rabaul (Papua New Guinea), Sakura-jima (Japan), Shiveluch (Russia), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

NEW ACTIVITY/UNREST

Aso (Japan). Based on notices from JMA, the Tokyo VAAC reported reported that during 1-7 June plumes from Aso rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted NW, N, NE, E and S. [GVP: Aso]

Dieng Volcanic Complex (Indonesia). CVGHM reported that during 29 May-5 June carbon dioxide gas emissions from Timbang, a cone that is part of the Dieng Volcanic Complex, remained elevated. Seismicity for Dieng also remained high. During 4-5 June white plumes from Sileri crater rose 20-60 m high and white plumes from Timbang rose only 2 m and drifted 300 m S. The Alert Level remained at 3 (on a scale of 1-4). [GVP: Dieng Volcanic Complex]

Kliuchevskoi (Russia). KVERT reported that during 27 May-3 June seismic activity at Kliuchevskoi was detected. Moderate steam-and-gas activity was observed on 30 May and 1 June; cloud cover prevented observations on the other days of the week. The Aviation Colour Code was lowered to Green. The Tokyo VAAC reported that on 6 June a possible eruption detected in satellite imagery produced a plume that rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted NE. The VAAC stated that the ash could have also originated at Bezymianny. [GVP: Kliuchevskoi]

Popocatépetl (Mexico). CENAPRED reported that during 31 May-1 June steam-and-gas emissions from Popocatépetl occasionally contained small amounts of ash. At 0637 on 3 June an ash plume rose 3 km above the crater following seismic tremor. The lower-altitude portion of the plume drifted W (towards the state of Morelos) and the higher-altitude portion of the plume drifted ENE (over Puebla, 40 km E). Within a few hours ashfall was reported in the Morelos state, municipalities of Tetela del Volcán (20 km SW), Zacualpan (31 km SW), Jonacatepec (43 km SW) and Axochiapan (60 km SSW). At 2112 high-frequency, low-amplitude tremor was detected that was followed by an ash plume at 2116 that rose 1 km above the crater and drifted W. By 2130 activity had returned to normal levels. On 4 June an ash plume rose 1 km above the crater and drifted SSW at lower altitudes and NE at higher altitudes. [GVP: Popocatépetl]

Puyehue-Cordón Caulle (Chile). OVDAS-SERNAGEOMIN reported that between 2000 on 2 June and 1959 on 3 June about 1,450 earthquakes at Puyehue-Cordón Caulle were detected, or an average of about 60 earthquakes per hour. The earthquakes were mostly hybrid and long-period, and located in the SE sector of the Cordón Caulle rift zone at depths of 2-5 km. SERNAGEOMIN scientists along with regional authorities flew over the volcano, noting no significant changes. The Alert Level remained at 4, Yellow. Area residents reported feeling earthquakes during the evening of 3 June through the morning of 4 June. For a six-hour period on 4 June, seismicity increased to an average of 230 earthquakes per hour, at depths of 1-4 km. About 12 events were magnitudes greater than 4, and 50 events were magnitudes greater than 3. The Alert Level was raised to 5, Red. ONEMI reported that the border crossing into Argentina was closed and about 700 local people were to start evacuating. Later, an explosion from Cordón Caulle produced a 5-km-wide ash-and-gas plume that rose to an altitude of 12.2 km (40,000 ft) a.s.l. as noted by OVDAS scientists. The plume drifted S at 5 km altitude, and W and E at 10 km altitude. The Alert Level was raised to 6, Red. ONEMI reported the continuation of evacuations and increased the potential number of evacuees to 3,000. ONEMI also reported that the National Director of SERNAGEOMIN noted that lava was not detected, but pyroclastic flow deposits were observed. Residents reported a strong sulphur odor and significant ash and pumice fall. During 4-5 June ashfall several centimeters thick was reported in San Carlos de Bariloche, 100 km SE in Argentina, and surrounding areas. Based on analyses of satellite imagery, SIGMET notices, and information from the Puerto Montt Flight Information Region (FIR), the Buenos Aires VAAC reported that on 4 June ash plumes rose to altitudes of 10.7-13.7 km (35,000-45,000 ft) a.s.l. and drifted 870 km ESE. Diffuse gas-and-steam plumes drifted W. The next day an ash plume continued to rise to altitudes of 10.7-12.2 km (35,000-40,000 ft) a.s.l. and had drifted as far as 1,778 km ESE, over the coast of Argentina, and out into the Atlantic Ocean. A portion of the plume drifted WSW. News outlets reported that flights in southern Argentina were canceled during 4-5 June. On 6 June the continuous ash plume changed direction and was blown ENE as far as 178 km while the previous portion of the plume continued to drift ESE over the ocean. On 7 June the VAAC reported continuous emissions. Ash plumes rose to altitudes of 5.5-9.8 km (18,000-32,000 ft) a.s.l. and were 65-95 km wide. A large area of ash continued to drift E over the Atlantic Ocean. News articles noted that some flights in Paraguay and Chile were cancelled and about 4,000 people had evacuated. News photos showed ashfall and people collecting pumice in San Martin de los Andes, Argentina, 80 km NE. [GVP: Puyehue-Cordón Caulle]

Yasur (Vanuatu). On 1 June the Vanuatu Geohazards Observatory raised the Alert Level for Yasur to 3 (on a scale of 0-4) following increasing explosive activity during May. Access to the volcano was closed and a 500-m zone around the volcano was restricted. The Geohazards team noted strong explosions from all three active vents along with ash emissions and bomb ejections during 31 May-3 June. Bombs fell around the crater rim and explosions were heard and observed from nearby villages. [GVP: Yasur]

ONGOING ACTIVITY

Batu Tara (Indonesia). Based on analyses of satellite imagery, the Darwin VAAC reported that during 1-7 June ash plumes from Batu Tara rose to altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted 40-130 km NW, W, and SW. [GVP: Batu Tara]

Dukono (Indonesia). Based on analyses of satellite imagery, the Darwin VAAC reported that on 1 June an ash plume from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 110 km NE. [GVP: Dukono]

Karangetang [Api Siau] (Indonesia). CVGHM reported that during 25 March-5 June seismic activity at Karangetang decreased along with the potential threat of avalanches and pyroclastic flows. During 1 May-5 June no pyroclastic flows were observed. Lava flowed 200 m down the flanks and produced incandescent material from the flow fronts that traveled an additional 1.5-1.8 km. Bluish-white emissions rose as high as 500 m from the main crater and incandescence from the crater was observed at night. Lava flow and avalanche activity decreased on 19 May. The Alert Level was lowered to 2 (on a scale of 1-4) on 6 June. [GVP: Karangetang [Api Siau]]

Karymsky (Russia). KVERT reported moderate seismic activity at Karymsky during 27 May-3 June. Seismic data indicated that possible ash plumes rose to an altitude of 3.1 km (10,200 ft) a.s.l. Satellite imagery detected a thermal anomaly during 28-30 May and 1-2 June, and an ash plume that drifted 10 km SW on 30 May. The Aviation Colour Code remained at Orange. Based on information from KVERT, the Tokyo VAAC reported that on 4 June an ash plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SE. [GVP: Karymsky]

Kilauea (Hawaii, USA). HVO reported that two lava lakes at Kilauea were active during 1-7 June. The level of the summit lava lake remained mostly stable deep in the vent inset within the E wall of Halema’uma’u Crater. Occasional increases in the lake level covered a vent on the south side wall; on other days lava from the vent cascaded down into the lake. A gas plume from the vent drifted SW. The (preliminary) sulphur dioxide emission rate from all east rift zone sources was 1,100 tonnes/day on 3 June. Lava from a vent near the W edge of the perched lava lake in the center of Pu’u ‘O’o crater floor continued to fill the lake. The lake level fluctuated and occasionally overflowed the edges or flowed through rim breaches, sending lava onto the Pu’u ‘O’o crater floor. The rim of the perched lava lake was elevated 2-3 m higher than the surrounding crater floor, which was 39 m below the E crater rim on 1 June. [GVP: Kilauea]

Kizimen (Russia). KVERT reported that during 27 May-3 June seismicity from Kizimen was above background levels and strong tremor continued to be detected. Seismic data indicated that possible ash plumes rose to an altitude of 6 km (19,700 ft) a.s.l. Satellite images showed a large bright thermal anomaly daily on the volcano. The Aviation Colour Code remained at Orange. Based on information from KVERT, the Tokyo VAAC reported that on 4 June an ash plume rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted SE. [GVP: Kizimen]

Rabaul (Papua New Guinea). RVO reported that variable amounts of white vapour plumes rose from Rabaul caldera’s Tavurvur cone during 1-31 May and were occasionally tinted brown. During 19-21 May thick white plumes rose 2-3 km above the crater. [GVP: Rabaul]

Sakura-jima (Japan). Based on information from JMA, the Tokyo VAAC reported that during 2-6 June explosions from Sakura-jima produced plumes that rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. Plumes drifted S on 2 June. On 2 and 4 June, pilots observed ash plumes that rose to altitudes of 2.4-3.7 km (8,000-12,000 ft) a.s.l. [GVP: Sakura-jima]

Shiveluch (Russia). KVERT reported that during 27 May-3 June seismic activity at Shiveluch indicated that possible ash plumes rose to altitudes of 4.7-9 km (15,400-29,500 ft) a.s.l. During 29-30 May satellite imagery showed a thermal anomaly over the lava dome. Those same two days, ground-based observers noted that ash plumes rose to an altitude of 10 km (32,800 ft) a.s.l. and drifted S. Clouds prevented observations on the other days. During 30-31 May long ash clouds drifted 1,000 km SW and approached Petropavlovsk-Kamchatsky. The Aviation Colour Code remained at Orange. Based on information from KVERT and analyses of satellite imagery, the Tokyo VAAC reported that on 4 June an eruption produced a plume that rose to an altitude of 5.2 km (17,000 ft) a.s.l. According to KEMSD, eruptions during 5-6 June produced plumes that rose to altitudes of 6.1-9.1 km (20,000-30,000 ft) a.s.l. Plumes drifted E on 5 June. [GVP: Shiveluch]

Villarrica (Chile). On 31 May brief emissions of gas and steam with possible light ash from Villarrica was observed through the OVDAS web camera. [GVP: Villarrica]

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 1-7 June 2011. It is provided for information only, and is based on but not a substitute for the full report, which comes with its own criteria and disclaimers. The map base is derived from the Smithsonian Institution/USGS/US Naval Research Laboratory This Dynamic Planet website.

For all our coverage of the SI/USGS Weekly Volcanic Activity Reports: Weekly Volcanic Activity Reports « The Volcanism Blog.

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