SVERT reported that a thermal anomaly from Tiatia, a volcano on NE Kunashir Island, was detected by satellite on 19 June. Tiatia does not have a seismic network; satellite image observations are the primary tool for monitoring many of the Kuril Islands volcanoes.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)

INGV-CT reported a series of landslides on 19 June from the NW rim of the pit crater located on the lower E side of Etna's Southeast Crater. The collapses generated small ash clouds that drifted NE, and changed the pit crater's morphology. Data from a thermal camera showed thermal anomalies over 180 degrees Celsius indicating that the landslide material was hot. Fumarolic activity was seen in the landslide area during an inspection the day before.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

KVERT reported that during 6 and 12-13 June strong steam-and-gas activity from Gorely was noted, and during 11-18 June seismic activity was above background levels. A small increase in the size and temperature of a thermal anomaly over the volcano began on 15 June and was detected through 18 June. The Level of Aviation Color Code remained at Green.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Based on a pilot observation, the Tokyo VAAC reported that an ash plume from Ioto (Iwo-jima) drifted more than 35 km N.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

INGEOMINAS reported that during 9-15 June sulfur dioxide plumes from Nevado del Huila were detected by multiple sources. A distinct change in seismicity was noted on 13 June and was characterized by an increased intensity and a greater number of hybrid earthquakes. These earthquakes were shallow events beneath Pico Central. The Alert Level was raised to II (Orange; "probable eruption in term of days or weeks"). On 16 June two episodes of tremor possibly indicated ash emissions; this was unconfirmed. However, sulfur dioxide plumes were again detected. During 20-21 June small white pulsating fumarolic plumes drifted W.

Source: Servicio Geológico Colombiano (SGC)

INSIVUMEH reported that during 16-22 June Pacaya's MacKenney cone emitted white-and-blue fumarolic plumes that rose 50-400 m high. Ash emissions were occasionally observed. INSIVUMEH also noted that the lava flows on the SE flank were advancing more slowly and exhibited fewer areas of incandescence.

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

Although storm clouds occasionally prevented observations of Tungurahua's summit area during 16-18 June, steam-and-ash plumes were seen that rose to altitudes of 5.5-7 km (18,000-23,000 ft) a.s.l. Daily reports of ashfall came from multiple areas about 8 km W and SW, but ash was noted as far away as 15 km SW on 17 June. Ashfall in Cahuají (8 km SW) covered pastureland, preventing animals from grazing. Roaring noises were occasionally reported. During 17-18 June, incandescence from the crater was seen at night. An explosion was followed by roaring noises, sounds resembling blocks rolling down the flanks, and incandescence.

On 19 June steam-and-ash plumes rose 500 m above the crater and large windows vibrated after noises were heard. The next day snow covered parts of the E and S flanks. Steam-and-gas plumes rose 500 m and drifted SSW, E, and NW during 20-21 June. Lahars in drainages to the SW carried blocks up to 50 cm in diameter. On 21 June ashfall was reported in areas 8 km W.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

RVO reported that during 16-17 June white and gray plumes from Ulawun rose 1 km high. Fine ash fell on the SW, W, and NW flanks. Low rumbling noises were heard from the S and SE flanks, and weak fluctuating incandescence was observed for a brief period of time. On 18 and 19 June, white-to-gray plumes rose from the crater, and roaring noises were reported from the NW flank. Seismicity increased to a high level and was dominated by volcanic tremor. During 19-20 June continuing white and gray emissions produced plumes that rose 1 km. Fine ashfall was seen on the NW and SW flanks. Fluctuating incandescence was seen from the S and SE flanks and occasional low roaring noises were noted. Seismicity declined to moderate levels on 20 June.

Source: Rabaul Volcano Observatory (RVO)

Based on information from JMA, the Tokyo VAAC reported that during 16-22 June explosions from Sakura-jima sometimes produced plumes. Those plumes, along with ash plumes occasionally seen by pilots, rose to altitudes of 1.2-3 km (4,000-10,000 ft) a.s.l. According to a news article, the JMA noted that two eruptions on 20 June brought the total number of eruptions in 2010 to 550, setting a new annual record. The total number of eruptions in 2009, the previous high at Sakura-jima, was 548.

Sources: The Japan Times, Tokyo Volcanic Ash Advisory Center (VAAC)

Based on analyses of satellite imagery, the Darwin VAAC reported that during 19-20 June ash plumes from Batu Tara rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted more than 35 km NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Based on analyses of satellite imagery, the Darwin VAAC reported that during 18-20 June ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 120 km W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Based on information from the Vanuatu Geohazards Observatory, the Wellington VAAC reported that during 16-19 June ash plumes from Gaua rose to an altitude of 3 km (10,000 ft) a.s.l. On 19 June the plume drifted more than 90 km W.

Source: Wellington Volcanic Ash Advisory Center (VAAC)

KVERT reported that during 11-18 June seismic activity from Karymsky was above background levels. Seismic data suggested that possible ash plumes rose to an altitude of 5.2 km (17,000 ft) a.s.l. during 10-12 June and to an altitude of 3.9 km (12,800 ft) a.s.l. on 16 June. Satellite imagery analysis revealed ash plumes that drifted about 195 km E on 10 and 11 June and a thermal anomaly over the volcano on 11, 15, and 16 June. Small ash clouds drifted 22 km E on 17 June. The Aviation Color Code level remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

During 16-22 June HVO reported that activity at Kīlauea continued from the summit and the east rift zone. At the summit, the level of a lava-pool surface in the deep pit inset within the floor of Halemaʻumaʻu crater remained mostly stable; glow from the vent was also visible at night. A plume from the vent mainly drifted SW, dropping small amounts of tephra, and occasionally fresh spatter, downwind.

At the east rift zone, lava flows that broke out of the TEB lava-tube system built up a number of rootless shields between 580 and 520 m elevation. Satellite images showed thermal anomalies from minor lava flows originating from the shields. The Puʻu ʻŌʻō web camera views of a lava pond on the crater floor, that was an estimated 300 x 150 m in dimension, were often obscured by fumes. One small lava flow was seen on the crater floor on 18 June. Scientists saw a new gas vent on the E wall of the crater during an overflight on 21 June that had generated incandescence during the previous few days.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

KVERT reported that during 11-18 June seismic activity from Kliuchevskoi was above background levels and Strombolian activity was observed. Ashfall was reported in Klyuchi, 30 km NNE on 11 June. Ash plumes occasionally rose to an altitude of 5.5 km (18,000 ft) a.s.l. during 13-16 June. Satellite imagery analysis revealed a large daily thermal anomaly from the volcano and ash plumes that drifted 40 km SE on 13 and 15 June. The Aviation Color Code level remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

KVERT reported that during 11-18 June seismic activity from Shiveluch was above background levels and suggested that possible ash plumes rose to an altitude of 4.9 km (16,100 ft) a.s.l. Strong fumarolic activity and hot avalanches were seen on most days. Satellite imagery showed a large daily thermal anomaly over the lava dome, and a small anomaly near the lava dome on 15 June. The Aviation Color Code level remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

MVO reported that pyroclastic flows from the Soufrière Hills lava dome occurred during 11-18 June. One of the largest pyroclastic flows traveled W down Gages Valley; others originated from within the collapse scar. A thermal camera showed several hot areas on the lava dome, likely exposed from rockfall and pyroclastic flow activity. On 28 June a small lahar descended the Belham Valley, to the NW. The Hazard Level remained at 3.

Source: Montserrat Volcano Observatory (MVO)