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 18 hours ago

Fuego (Guatemala) - Report for 11 March-17 March 2015 - NEW

Tue, 03/17/2015 - 11:45pm

INSIVUMEH reported that during 10-11 March the magnitude and number of explosions at Fuego increased, producing ash plumes that rose 650-950 m above the crater and drifted 12 km W, NW, and N. Shock waves from explosions were detected in nearby areas including Panimache I and II (8 km SW), Morelia (9 km SW), Sangre de Cristo (8 km WSW), and San Pedro Yepocapa (8 km NW). During 12-13 March explosions generated ash plumes that rose 800 m and drifted 10-12 km S and SW. Incandescent tephra was ejected 100 m high. During 15-16 March ash plumes from explosions rose 550-950 m and drifted 10-12 km WSW; shock waves were reported and ash fell in Panimache, Morelia, and Santa Sofía (12 km SW).

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

Ruang (Indonesia) - Report for 11 March-17 March 2015 - NEW

Tue, 03/17/2015 - 11:45pm

PVMBG reported that emissions from Ruang were unobserved during periods of clear weather from 1 January through 12 March. Seismicity increased starting on 6 March prompting PVMBG to raise the Alert Level to 2 (on a scale of 1-4) on 12 March. Residents and tourists were warned not to approach the craters within a 1.5-km radius.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Turrialba (Costa Rica) - Report for 11 March-17 March 2015 - NEW

Tue, 03/17/2015 - 11:45pm

Based on webcam views, weather models, and OVSICORI-UNA updates, the Washington VAAC reported that on 8 March diffuse ash emissions rose from Turrialba's West Crater and seismicity increased. OVSICORI-UNA reported an ash emission at 0100 on 11 March. Another ash emission occurred at 1050 on 12 March. Almost continuous ash emissions were observed in the afternoon and were punctuated by two noticeable explosions at 1338 and 1450. Ash plumes rose as high as 2 km above the crater and drifted NW. Ashfall occurred in the Central Valley and in the capital of San Jose (30 km WSW), and caused the closure of the Juan Santamaria International Airport, 48 km W, which reopened during the evening on 13 March. The local Tobias Bolanos airport (40 km WSW) closed intermittently. On 13 March two short explosions occurred at 1045 and 1100, and then a third occurred at 2100. According to the VAAC, ash plumes that day drifted 45 km NE at an altitude of 9.1 km (30,000) a.s.l. and drifted over 35 km W at an altitude of 6.1 km (20,000 ft) a.s.l.

Sources: Comisión Nacional de Prevención de Riesgos y Atención de Emergencias (CNE),Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA) ,Washington Volcanic Ash Advisory Center (VAAC)

Ubinas (Peru) - Report for 11 March-17 March 2015 - NEW

Tue, 03/17/2015 - 11:45pm

Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 10 February-17 March seismicity at Ubinas was generally low, although a hybrid event was detected on 11 March. Two main sources of seismicity were located 1 km W of the crater at depths of 1-3 km and 2 km NW at depths of 1-5 km. Water-vapor emissions rose as high as 1.5 km above the crater. Sporadic ash emissions were observed on 17 March.

Source: Instituto Geofísico del Perú (IGP)

Chirpoi (Russia) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

SVERT reported that satellite images over Snow, a volcano of Chirpoi, showed a thermal anomaly during 9, 14, and 15 March. Cloud cover obscured views on other days during 9-16 March. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

Colima (Mexico) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

Based on satellite images, Mexico City MWO, Colima Tower notices, and a webcam, the Washington VAAC reported ash plumes from Colima during 11-13 March. On 12 March an ash cloud observed in satellite images was located between 40 and 90 km ENE. Additional emissions produced ash plumes that drifted 50-90 km ENE. Later that day ash plumes rose to altitudes of 6.1-6.7 km (20,000-22,000 ft) a.s.l. and drifted E, ESE, and SE. On 13 March an ash plume rose to an altitude below 4.9 km (16,000 ft) a.s.l. and drifted E. Thermal anomalies were detected during 12-13 March.

Source: Washington Volcanic Ash Advisory Center (VAAC)

Klyuchevskoy (Russia) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

After a quiet period of 24 hours at Klyuchevskoy, volcanic-tremor magnitude significantly increased at 0500 on 10 March prompting KVERT to raise the Aviation Color Code to Orange. Video images showed moderate gas-and-steam activity while satellite images detected a gas-and-steam plume with small amounts of ash drifting about 92 km ESE at an altitude of 5 km (16,400 ft) a.s.l. During 10-11 March a weak thermal anomaly over the summit was detected.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Manam (Papua New Guinea) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

RVO reported that activity at both Manam's Southern Crater and Main Crater was low during 1-18 March although inclement weather made crater observations difficult; no noises were reported. Seismicity had slowly and erratically increased since 28 February, peaked on 13 March and remained at that level through 15 March, and then increased again through 18 March. The seismicity was characterized by small-to-moderate, sub-continuous, and continuous volcanic tremor. Discrete low-frequency earthquakes were also recorded.

Source: Rabaul Volcano Observatory (RVO)

Reventador (Ecuador) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

During 10-17 March IG reported moderate seismic activity including explosions, long-period earthquakes, harmonic tremor, and tremor at Reventador; cloud cover often prevented visual observations. A lava flow continued to descend the SW flank and was 1.2 m long by 13 March.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Asosan (Japan) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

JMA reported that, based on seismic data, the eruption from Asosan’s Nakadake Crater that began on 25 November 2014 continued during 13-16 March. High-amplitude tremor continued, although it had decreased on 9 March. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Karymsky (Russia) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

KVERT reported that during 6-13 March moderate activity at Karymsky continued. Satellite images showed ash deposits extending in different directions and a thermal anomaly on the volcano on 7 March. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Shishaldin (United States) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

AVO reported that seismicity at Shishaldin continued to be elevated over background levels during 11-17 March, indicating that low-level eruptive activity confined to the summit crater likely continued. Minor steaming from the summit was observed in webcam images on 11 March. 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 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

KVERT reported that a moderate explosive eruption at Zhupanovsky continued during 6-13 March. Two strong explosions on 7 and 8 March generated ash plumes that rose to altitudes of 6-7 km (19,700-23,000 ft) a.s.l. Satellite images detected ash plumes drifting 333 km E on 7 and 10 March, and 232 km NE on 8 March. A thermal anomaly was also detected during 7-10 March. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Popocatepetl (Mexico) - Report for 11 March-17 March 2015 - NEW

Tue, 03/17/2015 - 11:45pm

CENAPRED reported that during 10-17 March the seismic network at Popocatépetl recorded between 6 and 100 gas-and-steam emissions that likely contained some ash; cloud cover mostly prevented observations of the volcano, so on most days ash in the plumes was not confirmed. Two explosions at 1047 on 10 March generated ash plumes that rose 1.5 km above the crater. An explosion on 11 March produced a plume that rose 1 km. The Alert Level remained at Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Dukono (Indonesia) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

Based on a pilot observation, analyses of satellite imagery, and wind data, the Darwin VAAC reported that on 13 March an ash plume from Dukono rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted 55 km ENE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

JMA reported that 10 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m during 13-16 March. Incandescence from the crater was periodically visible at night, and inflation continued to be detected. The Alert Level remained at 3 (on a scale of 1-5). Based on JMA notices, the Tokyo VAAC reported that during 11-17 March plumes rose to altitudes of 1.8-4.3 km (6,000-14,000 ft) a.s.l. and drifted SE, E, and N.

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

Kilauea (United States) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

During 11-17 March HVO reported that Kilauea’s 27 June NE-trending lava flow continued to be active with several small and scattered breakouts within the flow-field margins, upslope of the leading front. Most of the erupting lava was found in the two largest breakouts: the 21 February breakout on the flank of Pu'u 'O'o and the 9 March breakout near the forested cone of Kahauale'a. A third and relatively small breakout was 5 km farther NE of Pu'u 'O'o. At Pu'u 'O'o Crater, glow emanated from several outgassing openings in the crater floor. A small lava pond was visible in the S portion of the crater. The circulating lava lake occasionally rose and fell in the deep pit within Halema'uma'u Crater. Gas emissions remained elevated. During 12-13 March a tiny lava flow erupted from the NE edge of the crater.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Sheveluch (Russia) - Report for 11 March-17 March 2015

Tue, 03/17/2015 - 11:45pm

KVERT reported that during 6-13 March lava-dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot block avalanches, and fumarolic activity. Strong explosions on 8 March generated ash plumes that rose to altitudes of 7-8 km (23,000-26,200 ft) a.s.l. and drifted 885 km E. A daily thermal anomaly was visible in satellite images. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)