Roundup of Global Volcanic Activity – New Activity for the week of 14 December-20 December 2016

Bezymianny | Central Kamchatka (Russia) : KVERT reported that lava-dome extrusion likely continued at Bezymianny during 14-16 December. A gas-and-steam plume containing a small amount of ash drifted about 118 km W on 15 December. The Tokyo VAAC noted that ash plumes rose as high as 6.1 km (20,000 ft) a.s.l. that same day. The Aviation Colour Code remained at Orange.

Bogoslof | Fox Islands (USA) : AVO reported that a short-lived explosive eruption at Bogoslof, observed and reported by several pilots around 1600 on 20 December, produced an ash plume that rose to 10.3 km (34,000 ft) a.s.l. A subsequent pilot report made 50 minutes later indicated that activity had decreased. Satellite data showed a discrete, short-lived explosion just prior to 1600, and a detached plume that drifted S. AVO raised the Aviation Colour Code to Red and the Volcano Alert Level to Warning.

Colima | Mexico : Based on information from the National Civil Protection coordinator, news articles reported that an explosion at Colima occurred at 0943 on 16 December, generating an ash plume that rose 2.3 km above the crater rim and drifted NNW. At 0807 on 17 December an explosion sent an ash plume 1 km above the crater that then drifted NE. Later that day at 2058 a strong explosion (the strongest registered within the past 16 months) ejected incandescent material onto the flanks and ash plumes as high as 2 km. Lava flows and rolling incandescent material traveled as far as 1.7 km down the flanks. Explosions on 18 December produced ash plumes that again rose as high as 2 km above the crater.

Copahue | Central Chile-Argentina border : According to ONEMI, OVDAS-SERNAGEOMIN reported that during the first two weeks of December activity at Copahue continued to be dominated by weak Strombolian explosions, likely from a pyroclastic cone forming on the floor of El Agrio crater. The Alert Level remained at Yellow (second highest level on a four-colour scale); SERNAGEOMIN recommended no entry into a restricted area within 1.5 km of the crater. ONEMI maintained an Alert Level Yellow (the middle level on a three-colour scale) for the municipality of Alto BiobĂ­o. Based on satellite and webcam images, the Buenos Aires VAAC reported that during 13-20 December gas-and-ash plumes from Copahue rose to altitudes of 3-3.9 km (10,000-13,000 ft) a.s.l. and drifted NE, ENE, E, and SE.

Fuego (Guatemala): (21 Dec) The 16th paroxysm of the volcano (violent episode with lava fountaining and lava flow emission) in 2016 has started. Activity gradually increased during the past days and new lava flows have started to descend the SE and SW flanks. Collapsing parts of the lava emplaced on the upper slopes has generated pyroclastic flows that were about 300 m wide and reached up to approx. 3500 m length, generating dense ash plumes of 1-2 km height.


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