GVP-Weekly-20120509 gvp@si.edu 2012-05-09T04:01:11 -0500 Actual Alert Global Volcanism Program (Smithsonian Institution) and Volcano Hazards Program (US Geological Survey) Public Geo Volcano None Unknown Unknown Observed Volcano NameBatu Tara New ActivityYes Observatory Name (primary)Centre of Volcanology and Geological Hazard Mitigation Observatory Link (primary)http://portal.vsi.esdm.go.id/joomla/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Batu Tara (Indonesia), 2 May-8 May 2012 Based on analyses of satellite imagery, the Darwin VAAC reported that during 2-4 May ash plumes from Batu Tara rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 37 km NW. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#batutara Source: Darwin Volcanic Ash Advisory Centre (VAAC) Indonesia-7.792,123.579,0 Geo Volcano None Unknown Unknown Observed Volcano NameCleveland New ActivityYes Observatory Name (primary)Alaska Volcano Observatory Observatory Link (primary)http://www.avo.alaska.edu/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Cleveland (United States), 2 May-8 May 2012 Based on analyses of satellite images, AVO reported on 4 May that the small lava dome recently emplaced in Cleveland's summit crater had been destroyed late in the previous week, but the explosion was too small to be detected by distant infrasound and seismic networks. A small new dome was extruded following the explosion and was the fifth dome to be observed in this eruptive episode which began in July 2011. During 4-5 May two small explosions were detected. No ash was observed with the mostly-cloudy conditions. Satellite observations were obscured by clouds during 6-8 May. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#cleve Source: Alaska Volcano Observatory (AVO) United States52.825,-169.944,0 Geo Volcano None Unknown Unknown Observed Volcano NamePago New ActivityYes Observatory Name (primary) Observatory Link (primary) Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Pago (Papua New Guinea), 2 May-8 May 2012 Based on analyses of satellite imagery, the Darwin VAAC reported that ash-and-steam plumes from Pago rose to an altitude of 13.7 km (45,000 ft) a.s.l. and drifted 75 km NE. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#pago Source: Darwin Volcanic Ash Advisory Center (VAAC) Papua New Guinea-5.58,150.52,0 Geo Volcano None Unknown Unknown Observed Volcano NamePopocatépetl New ActivityYes Observatory Name (primary)CENAPRED, México Observatory Link (primary)http://www.cenapred.unam.mx/es/Instrumentacion/InstVolcanica/MVolcan/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Popocatépetl (México), 2 May-8 May 2012 CENAPRED reported that during 2-3 May activity at Popocatépetl increased significantly. Spasmodic tremor was detected along with a dense and continuous plume of gas and ash that drifted W, NW, and NNE. Ash fell in multiple areas, including Amecameca (20 km NW), Atlautla, Ozumba (18 km W), Ecatzingo (15 km SW), Chalco (35 km NW), and some parts of SE México City (70 km NW). On 3 May gas-and-ash plumes rose 1.5 km above the crater and drifted W and NE. Incandescent fragments ejected from the crater landed on the flanks as far as 800 m away. Explosion-generated gas-and-ash plumes the next day rose 2.5 km above the crater and drifted NW. Spasmodic tremor was detected along with a dense and continuous plume of gas and ash that drifted WNW. Later that day gas-and-ash plumes rose 1 km. During 5-6 May gas-and-ash plumes rose 1.5 km above the crater and drifted N, NE, and E. Light ashfall was reported in Atlixco (25 km SE), San Juan Tianguismanalco (22 km SE), Tochimilco (16 km SSE), San Pedro Benito Juárez (10 km SE), and San Nicolás de los Ranchos (16 km ENE). During 5-7 May incandescent fragments ejected from the crater landed on the flanks as far as 500 m away. A gas-and-ash plume drifted ESE on 7 May. The next day activity remained high; seismic events were accompanied by dense and continuous plumes of steam, gas, and ash that drifted mainly ESE. The Alert Level remained at Yellow Phase Three. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#popo Source: Centro Nacional de Prevencion de Desastres (CENAPRED) México19.023,-98.622,0 Geo Volcano None Unknown Unknown Observed Volcano NameSemeru New ActivityYes Observatory Name (primary)Centre of Volcanology and Geological Hazard Mitigation Observatory Link (primary)http://portal.vsi.esdm.go.id/joomla/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Semeru (Indonesia), 2 May-8 May 2012 CVGHM reported that during 1-29 February multiple pyroclastic flows from Semeru traveled 500 and 2,500 m into the Besuk Kembar and Besuk Kobokan rivers (on the S flank), respectively. During 1 February-30 April dense gray-to-white plumes rose 100-500 m above Jongring Seloko crater and drifted W and N. Incandescence was visible up to 50 m above the crater during 1 February-31 March. Seismicity decreased from March to April. Observations indicated that the lava dome grew in April. On 2 May CVGHM lowered the Alert Level to 2 (on a scale of 1-4) and reminded the public not to approach the crater within a 4-km radius. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#semeru Source: Center of Volcanology and Geological Hazard Mitigation (CVGHM) Indonesia-8.108,112.92,0 Geo Volcano None Unknown Unknown Observed Volcano NameDukono New ActivityNo Observatory Name (primary)Centre of Volcanology and Geological Hazard Mitigation Observatory Link (primary)http://portal.vsi.esdm.go.id/joomla/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Dukono (Indonesia), 2 May-8 May 2012 Based on analyses of satellite imagery, the Darwin VAAC reported that during 8-9 May ash plumes from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 75 km SE. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#dukono Source: Darwin Volcanic Ash Advisory Centre (VAAC) Indonesia1.68,127.88,0 Geo Volcano None Unknown Unknown Observed Volcano NameKarymsky New ActivityNo Observatory Name (primary)Kamchatka Volcanic Eruption Response Team Observatory Link (primary)http://www.kscnet.ru/ivs/kvert/index_eng.php Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Karymsky (Russia), 2 May-8 May 2012 KVERT reported that moderate seismic activity from Karymsky continued to be detected during 27 April-4 May, and indicated that possible ash plumes rose to an altitude of 2.3 km (7,600 ft) a.s.l. during 26-27 April and 2 May. Satellite imagery showed a gas-and-steam plume drifting 65 km SE on 27 April; a thermal anomaly was present during 27, 29, and 30 April and 2-3 May. The Aviation Color Code remained at Orange. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#karymsky Source: Kamchatkan Volcanic Eruption Response Team (KVERT) Russia54.05,159.45,0 Geo Volcano None Unknown Unknown Observed Volcano NameKilauea New ActivityNo Observatory Name (primary)Hawaiian Volcano Observatory Observatory Link (primary)http://hvo.wr.usgs.gov/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Kilauea (United States), 2 May-8 May 2012 During 2-8 May HVO reported that the circulating lava lake periodically rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. Frequent measurements indicated that the gas plume from the vent continued to deposit variable amounts of ash, and occasionally fresh spatter from an active source at the SE edge of the lava lake, onto nearby areas. Incandescence was visible from both a lava pond in a small pit on the E edge and a small spatter cone on the SE edge of the Pu'u 'O'o crater floor. Geologists observed slowly advancing lava flows on 4 May that were about 1.1 km from the coast, not reaching as far as previous flows on the coastal plain over the past month. On 5 May further collapse of the pit on the E edge of the Pu'u 'O'o crater floor led to much brighter incandescence from that area. Lava flows on the coastal plain stalled while new lava flows high on the pali formed on 5 May, vigorously advancing from the base of the pali to more than halfway across the flow field during 5-8 May. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#kilauea Source: US Geological Survey Hawaiian Volcano Observatory (HVO) United States19.421,-155.287,0 Geo Volcano None Unknown Unknown Observed Volcano NameNevado del Ruiz New ActivityNo Observatory Name (primary)INGEOMINAS, Colombia Observatory Link (primary)http://www.ingeominas.gov.co/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Nevado del Ruiz (Colombia), 2 May-8 May 2012 According to INGEOMINAS, the Observatorio Vulcanológico and Sismológico de Manizales reported that during 1-2 May both satellite images and field observers indicated that steam and sulfur dioxide emissions rose from Nevado del Ruiz. Seismicity continued to decrease. On 3 May the Alert Level was lowered to III (Yellow; "changes in the behavior of volcanic activity"). http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#ruiz Source: Instituto Colombiano de Geología y Minería (INGEOMINAS) Colombia4.895,-75.322,0 Geo Volcano None Unknown Unknown Observed Volcano NameSakura-jima New ActivityNo Observatory Name (primary)Sakurajima Volcano Observatory Observatory Link (primary)http://www.dpri.kyoto-u.ac.jp/~kazan/default_e.html Observatory Name (secondary)Geological Survey of Japan Observatory Link (secondary)http://www.aist.go.jp/RIODB/strata/VOL_JP/EN/index.htm Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Sakura-jima (Japan), 2 May-8 May 2012 JMA reported that during 1-7 May explosive eruptions from Sakura-jima's Showa Crater occurred 17 times and ejected tephra as far as 1.3 km from the crater. Very small eruptions from Minami-dake Crater occurred on 3 and 5 May. Based on information from JMA, the Tokyo VAAC reported that during 3-4 and 6-8 May explosions produced plumes that rose to altitudes of 1.5-3.7 km (5,000-12,000 ft) a.s.l. and drifted S, SE, and E. Ash was observed in satellite imagery on 3 May. A pilot observed an ash plume on 7 May that rose to an altitude of 2.4 (8,000 ft) a.s.l. and drifted SE. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#sakura Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC) Japan31.585,130.657,0 Geo Volcano None Unknown Unknown Observed Volcano NameShiveluch New ActivityNo Observatory Name (primary)Kamchatka Volcanic Eruption Response Team Observatory Link (primary)http://www.kscnet.ru/ivs/kvert/index_eng.php Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Shiveluch (Russia), 2 May-8 May 2012 KVERT reported that explosive activity at Shiveluch continued during 27 April-4 May. Ground-based observers and satellite imagery indicated that a viscous lava flow continued to effuse in the crater formed during a 2010 eruption and was accompanied by fumarolic activity. Seismic data and visual observations showed that ash plumes rose to altitudes of 4 and 5.4 km (13,200 and 17,800 ft) a.s.l. on 26 April and 1 May, respectively. Satellite imagery showed a weak thermal anomaly on the lava dome during 28-29 April and on 1 and 3 May. Explosions on 1 May produced ash plumes that rose to an altitude of 5 km (16,400 ft) a.s.l.; an ash cloud was observed in satellite imagery drifting 270 km NE that same day. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#shiveluc Source: Kamchatkan Volcanic Eruption Response Team (KVERT) Russia56.653,161.360,0 Geo Volcano None Unknown Unknown Observed Volcano NameSoufrière Hills New ActivityNo Observatory Name (primary)Montserrat Volcano Observatory Observatory Link (primary)http://www.mvo.ms/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Soufrière Hills (United Kingdom), 2 May-8 May 2012 MVO reported that the cloud cover which often obscures views of the Soufrière Hills lava dome cleared for a short period on 5 May, revealing multiple areas of incandescence, the same ones first observed on 11 November 2011. Some of the areas were visible to the naked eye while more were visible in a long-exposure photograph. Many of the bright areas were related to fumaroles. The Hazard Level remained at 2 (on a scale of 1-5). http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#soufhill Source: Montserrat Volcano Observatory (MVO) United Kingdom16.72,-62.18,0 Geo Volcano None Unknown Unknown Observed Volcano NameTungurahua New ActivityNo Observatory Name (primary)Escuela Politecnica Nacional, Instituto Geofísico Observatory Link (primary)http://www.igepn.edu.ec/ Observatory Name (secondary) Observatory Link (secondary) Global Volcanism Program (Smithsonian Institution) Volcanic activity report for Tungurahua (Ecuador), 2 May-8 May 2012 IG reported that during 2-8 May visual observations of Tungurahua were often limited due to cloud cover. Explosions were heard in Baños on 2 May and ashfall was reported in Pillate (7 km W) the next day. On 4 May steam emissions rose from the crater and an ash plume drifted W. Ashfall was reported in Pillate and Choglontus (SW). On 6 May explosions were detected and roaring was heard. An ash plume rose 1.5 km above the crater and drifted WSW. Ashfall covered houses and pastures in Bilbao (8 km W) and Pillate. Ash also fell in Chacauco. An ash plume drifted W on 7 May; ashfall was reported in Bilbao, Pillate, Mapayacu (SW), Cevallos (23 km NW), Pillate (7 km W), and Chacauco. http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20120502#tungurah Source: Instituto Geofísico-Escuela Politécnica Nacional (IG) Ecuador-1.467,-78.442,0