Volcanos

Roundup of Global Volcanic Activity - Ongoing Activity for the week of 12 July - 18 July 2017

Bagana | Bougainville (Papua New Guinea) : Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 16 July an ash plume from Bagana drifted W at an altitude of 2.1 km (7,000 ft) a.s.l.

Bezymianny | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly was identified over Bezymianny daily in satellite images. A lava flow continued to flow down the W flank of the dome. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Cleveland | Chuginadak Island (USA) : AVO reported that during 12-18 July no significant activity at Cleveland was observed in cloudy or mostly cloudy satellite and web camera images; some minor steaming was noted. Moderately elevated surface temperatures were identified in satellite images on 14 July. Aviation colour Code remained at Orange and the Volcano Alert Level remained at Watch.

Copahue | Central Chile-Argentina border : Based on webcam and satellite images the Buenos Aires VAAC reported that during 16-17 July steam-and-ash plumes rose from Copahue to altitudes of 3-3.4 km (10,000-11,000 ft) a.s.l. and drifted N and NW.

Dukono | Halmahera (Indonesia) : Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 12-15 July ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted W, NW, and S. Ash plumes on 17 July rose 1.5 km (5,000 ft) a.s.l. and drifted E.

Ebeko | Paramushir Island (Russia) : Based on observations by residents of Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 7-8 July generated ash plumes that rose as high as 1.5 km (4,900 ft) a.s.l. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that a weak thermal anomaly over Karymsky was identified in satellite images during 7 and 11-12 July. Ash plumes drifted 170 km SW and SE on 10 and 11 July, respectively. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Kilauea | Hawaiian Islands (USA) : During 12-18 July HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. Webcams recorded incandescence from long-active sources within Pu'u 'O'o Crater, from a vent high on the NE flank of the cone, and from a small lava pond (which had many small spattering sites along the margin) in a pit on the W side of the crater. The 61G lava flow, originating from a vent on Pu'u 'O'o Crater's E flank, continued to enter the ocean at Kamokuna. Several large cracks running parallel to the coastline spanned the width of the delta; several small collapses at the leading edge of the delta were noted on 11 July. Surface lava flows were active above and on the pali, and on the coastal plain within 1 km of the base of the pali.

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that during 8 and 12-13 July explosions at Klyuchevskoy generated ash plumes that rose as high as 5 km (16,400 ft) a.s.l. and drifted about 50 km SE. A weak thermal anomaly was identified in satellite images during 10-12 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Poas | Costa Rica : OVSICORI-UNA reported that during 12-17July gas plumes that rose as high as 1 km above Poás’s vents A (Boca Roja) and B (Boca Azufrada) drifted SW and NW.

Sabancaya | Peru : Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya increased compared to the previous week; there was an average of 19 explosions recorded per day during 10-16 July. Gas-and-ash plumes rose 3.5 km above the crater rim and drifted more than 40 km NW and E. Sulfur dioxide flux was as high as 2,959 tons per day, recorded on 16 July. The MIROVA system detected six thermal anomalies. An explosion at 0931 on 19 July generated an ash plume that rose 4 km above the crater rim and drifted N.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly was identified daily in satellite images over Sheveluch during 7-11 July; cloud cover prevented views during 12-14 July. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Sinabung | Indonesia : Based on PVMBG observations, satellite and webcam images, and wind data, the Darwin VAAC reported that during 14-15 July ash plumes from Sinabung rose 3.3-4.9 km (11,000-16,000 ft) a.s.l. and drifted E, ESE, SE, and W.

Turrialba | Costa Rica : OVSICORI-UNA reported eruptive events at Turrialba daily during 12-17 July. Gas and ash plumes rose 200-500 m above the vent and generally drifted NW, W, and SW. There were multiple events on 15 July, causing ashfall in Sabanilla de Montes de Oca (30 km WSW), Ipis (27 km SW), El Carmen de Guadalupe, Purral (26 km WSW), Guadalupe (32 km WSW), and Tibás (35 km WSW). A sulfur dioxide odor was also reported that day, in San José (36 km WSW), Tibas (35 km WSW), Guadalupe, Escazú (42 km WSW), and Puriscal (65 km WSW).