According to KVERT, the Tokyo VAAC stated that an eruption at Chikurachki began at 1000 on 16 February. A Support to Aviation Control Service (SACS) notice described a large amount of aerosol near the Northern Kuriles Islands at 1322 that same day. Satellite images detected ash plumes that rose to altitudes of 7-7.5 km (23,000-24,600 ft) a.s.l. and drifted 80 km W. The Aviation Color Code was raised to Orange. At 0641, 1328, and 1635 on 17 February satellite images showed ash plumes rising to altitudes of 3-3.5 km (10,000-11,500 ft) a.s.l. and drifting 95-230 km SW.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Based on satellite images, the Washington VAAC reported that on 11 February continued discrete emissions from Colima drifted NE and dissipated after 55 km. On 14 February a small eruption recorded by the webcam produced gas emissions with a low ash content that rose to an altitude of 4.9 km (16,000 ft) a.s.l. and drifted NNE.

In a 17 February bulletin, the Unidad Estatal de Protección Civil reported that Colima remained active, although there continued to be a slight decrease in the number and size of lava-block avalanches. Lava flows minimally advanced. Explosions continued but also decreased in intensity, producing ash plumes that rose 2-3 km above the crater. The lava dome had been partially destroyed, forming a carter about 140 m in diameter. Residents were warned not go within 5 km of the volcano.

Sources: Unidad Estatal de Protección Civil de Colima, Washington Volcanic Ash Advisory Center (VAAC)

On 12 February INSIVUMEH reported that explosions from Fuego produced water vapor, gas, and ash plumes that rose 350-800 m above the crater and drifted E and S, and at times NW, drifting as high as 1.7 km. During 12-14 February explosions generated ash plumes that rose 800 m and drifted 10-11 km E and SE. Incandescent material was ejected 100-150 m above the crater, causing avalanches in the Trinidad (S) drainage. During 15-16 February block avalanches descended the Cenizas (SSW), Trinidad, and Las Lajas (SE) drainages. Ashfall was reported in Panimache (8 km SW), Sangre de Cristo (8 km WSW), San Pedro Yepocapa (8 km NW). In a special report on 16 February INSIVUMEH noted 4-6 explosions per hour, and ash plumes that rose, based on pilot reports, to altitudes of 7-9.1 km (23,000-30,000 ft) a.s.l. and drifted more than 15 km SW and W. Another special report issued on 17 February stated that 4-6 explosions per hour continued to be detected. Large amounts of ash formed mushroom-shaped clouds that rose 0.6-1.1 km above the crater and drifted over 15 km NW, W, SE, and S. Incandescent material was ejected 150 m above the crater, causing avalanches in the Trinidad, Ceniza, Las Lajas, and Santa Teresa drainages.

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

KVERT reported that during 6-13 February a moderate explosive eruption at Karymsky continued. Satellite images showed a thermal anomaly over the volcano on 6 February; weather prevented views of the volcano on the other days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

KVERT reported that during 6-13 February a Strombolian and Vulcanian eruption at Klyuchevskoy continued. Incandescence at the summit was visible and bombs were ejected 200-300 m above the crater. Explosions generated ash plumes that rose to altitudes of 5.5-6.5 km (18,000-21,300 ft) a.s.l.; ashfall was reported in Kozyrevsk Village (50 km W) on 7 February and Klyuchi Village (30 km NNE) on 11 February. A lava flow effused onto the E flank. Satellite images showed a daily, big, bright thermal anomaly over the volcano, and ash plumes drifting about 400 km mainly NW and N at altitudes of 5.5-6.5 km (18,000-21,300 ft) a.s.l.

On 15 February at 1035 the webcam recorded ash plumes rising to altitudes of 6-6.5 km (19,700-21,300 ft) a.s.l. and drifting 74 km E. At 1211, 1347, and 1524 ash plumes rose to an altitude of 8 km (26,200 ft) a.s.l. and drifted 110-232 km E and ESE. The Aviation Color Code was raised to Red. At 1656 ash plumes rose to altitudes of 7.5-7.8 km (24,600-25,600 ft) a.s.l. and drifted 232 km ESE. The Aviation Color Code was lowered to Orange. At 1512 on 16 February ash plumes identified in satellite images rose to an altitude of 6 km (19,700 ft) a.s.l. and drifted 270 km S. The next day, at 0641, 1503, and 1505, ash plumes rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted 114-240 km SE.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

INSIVUMEH reported that during 12-13 February a series of weak explosions from Pacaya's Mackenney Crater generated dark gray ash plumes that rose 500-700 m above the crater and, along with fumarolic plumes, drifted 1.5 km S. During 14-15 February weak explosions continued to generate ash plumes; ash and fumarolic plumes drifted 800 m SE. The next day fumarolic and ash plumes drifted S and SW at a low altitude. During 16-17 February fumarolic plumes with small amounts of ash rose 100 m and drifted E.

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

OVPDLF reported that during 11-13 February visibility of the eruption at Piton de la Fournaise that began on 4 February from vents located 100 m outside and to the W of Bory Crater was hampered by poor weather conditions; tremor remained elevated. Tremor began to decrease at 1700 on 15 February, intensely fluctuated, and then disappeared around 2230. Incandescence visible with a webcam likely indicated draining lava tubes.

Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)

Based on information from PVMBG and weather models, the Darwin VAAC reported that during 11-12 February an eruption at Soputan generated ash plumes that rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted almost 30 km SE. Ash was not identified in satellite images due to darkness and meteorological clouds.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

OVDAS-SERNAGEOMIN reported that activity significantly increased at Villarrica during 1-16 February, characterized by increased seismicity, crater incandescence, and explosions. On 6 February seismicity increased significantly, explosions occurred in the crater, and ash emissions rose above the crater rim. The Alert Level was raised to Yellow (the second lowest level on a four-color scale). DOAS (Differential Optical Absorption Spectrometry) data showed an average monthly sulfur dioxide emission value of 222 tons per day; a high value during this period of 450 tons per day was recorded on 11 February. The highest number of explosions, five per minute, during the period occurred on 16 February. Explosions ejected incandescent material out of the crater as far as 1 km onto the S flank. During an overflight on 16 February, supported by ONEMI, volcanologists observed the lava lake and recorded temperatures near 800 degrees Celsius, tephra in and around the active crater, and a diffuse layer of ash on the flanks.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

JMA reported that 36 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m during 9-13 February. Incandescence from the crater was visible at night during 9-11 February, and inflation continued to be detected. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that during 11-17 February plumes rose to altitudes of 1.8-3.7 km (6,000-12,000 ft) a.s.l. and drifted E and SE. On 17 February pilots observed ash plumes that rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted SE.

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

JMA reported that, based on seismicity and infrasound data, the eruption from Asosan’s Nakadake Crater that began on 25 November 2014 continued intermittently during 9-13 February. Incandescent material was sometimes ejected onto the crater rim, and plumes rose 600 m above the crater. High-amplitude tremor continued. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

During 11-17 February, IMO maintained Aviation Colour Code Orange due to continued activity at Bárdarbunga’s Holuhraun eruptive fissure; the overall activity was persistent, but lower compared to recent weeks and months. Seismicity remained strong. Local air pollution from gas emissions persisted and GPS measurements showed that subsidence continued. The lava field covered 85 square kilometers on 14 February; measurements from 4 and 12 February showed almost no changes in the extent of the field.

Source: Icelandic Meteorological Office (IMO)

SVERT reported that satellite images over Snow, a volcano of Chirpoi, showed a thermal anomaly on 9 and 11 February. Cloud cover obscured views during 10 and 12-16 February. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 11 February ash plumes from Dukono rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted over 35 km S.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

During 11-17 February HVO reported that Kīlauea's 27 June NE-trending lava flow continued to be active with several small breakouts across the interior and edges of the lobes, upslope of the leading front. Small brush fires from the breakouts were noted about 3 km NE of Puʻu ʻŌʻō Crater and in an area W of the Kaohe Homesteads. The most northern lobe of lava remained about 500 m above Highway 130, near police and fire stations. At Puʻu ʻŌʻō Crater, glow emanated from several outgassing openings in the crater floor. The circulating lava lake occasionally rose and fell in the deep pit within Halemaʻumaʻu Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts of tephra onto nearby areas.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

JMA reported that no eruptions occurred from Kuchinoerabujima during 9-16 February although the level of activity remained elevated. White plumes rose 400-700 m above the crater. Low-level seismicity continued and tremor was absent. Scientists aboard an overflight on 10 February observed a new crater with high-temperature areas on the NE part, new fissures, and white steam emissions. The Alert Level remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

CENAPRED reported that during 10-11 and 11-12 February the seismic network at Popocatépetl recorded 146 and 101 low-intensity events, respectively, accompanied by steam-and-gas emissions that sometimes contained minor amounts of ash. Explosions were also detected, likely from lava-dome growth. On 11 February ashfall was reported in Puebla (~50 km to the E) and in the municipalities of Juan C. Bonilla, Domingo Arenas, Huejotzingo (27 km NE), and at the airport to the E. Intermittent nighttime incandescence from the crater was visible during 11-12 February.

During 13-17 February seismicity indicated ongoing emissions, and incandescence from the crater was noted. A series of explosions between 0650 and 1200 on 15 February generated plumes that rose 1.8 km above the crater and drifted NE. Ash fell in Huejotzingo, Domingo Arenas, Salvador el Verde (30 km NNE), San Felipe Teotlalcingo (26 km NNE) , and Puebla. Explosions continued to be detected; nine were registered during 16-17 February. The Alert Level remained at Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

KVERT reported that during 6-13 February lava-dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot block avalanches, and fumarolic activity. A strong explosion on 8 February generated ash plumes that rose to altitudes of 9-10 km (29,500-32,800 ft) a.s.l. and drifted 180 km NW. A thermal anomaly over the dome was detected daily. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

AVO reported that seismicity at Shishaldin continued to be elevated over background levels during 11-17 February. Elevated surface temperatures were observed in satellite images on most days, and minor steam emissions were recorded by the web cam on 11 February. Low-level eruptive activity confined to the summit crater likely continued. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Based on satellite images and weather models, the Darwin VAAC reported that during 11-12 February ash plumes from Sinabung rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted over 30 km SE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Based on JMA notices, the Tokyo VAAC reported that during 11-12 and 14-15 February ash plumes from Suwanosejima rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

KVERT reported that a moderate explosive eruption at Zhupanovsky continued during 6-13 February. Satellite images detected a daily thermal anomaly over the volcano. Ash clouds rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted about 65 km W on 6 and 9 February. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)