Roundup of Global Volcanic Activity – Ongoing Activity for the week of 9 November-15 November 2016

Fuego | Guatemala : INSIVUMEH reported that during 11-15 November explosions at Fuego generated ash plumes that rose as high as 1.3 km and drifted more than 15 km W and SW. Some explosions produced shock waves detected within a 10 km radius and also ejected incandescent material as high as 300 m. Minor avalanches were confined to the crater. Ashfall was reported in Morelia (9 km SW), Santa Sofía (12 km SW), Sangre de Cristo (8 km WSW), and Panimaché I and II (8 km SW).

Dukono | Halmahera (Indonesia) : Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 9-15 November ash plumes from Dukono rose to altitudes of 2.1-3.7 km (7,000-12,000 ft) a.s.l. and drifted N, NE, E, and SE.

Kilauea | Hawaiian Islands (USA) : During 9-15 November HVO reported that the lava lake continued to rise and fall, circulate, and spatter in Kilauea’s Overlook vent; the lake level rose almost to the rim (Halema’uma’u floor) during 9-10 November. Webcams recorded incandescence from long-active sources within Pu’u ‘O’o Crater. The 61G lava flow, originating from a vent on Pu’u ‘O’o Crater’s E flank, continued to enter the ocean near Kamokuna at the easternmost lava delta.

Klyuchevskoy | Central Kamchatka (Russia) : On 8 November, KVERT reported that activity at Klyuchevskoy had decreased significantly and therefore the Aviation Color Code was lowered to Yellow. Lava effusion onto the flanks was last noted on 3 November; the next day the thermal anomaly was reduced. Ash plumes were last detected in satellite images during 3-4 November. Strombolian activity in the crater was also observed on those days. Strong gas-and-steam emissions continued.

Reventador | Ecuador : During 9-15 November IG reported a high level of seismic activity including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions at Reventador; cloud cover sometimes prevented visual observations. Almost daily incandescent blocks were observed rolling as far as 1.6 km down the E, SE, and S flanks. Gas, water vapor, and ash plumes rose as high as 2 km and drifted W and NW.

Santa Maria | Guatemala : On 9 November a 15-m-wide, 1-m-deep lahar triggered by rainfall descended the Cabello de Ángel drainage, a tributary of the Nimá I river drainage on Santa María’s S flank, carrying tree trunks and blocks up to 1 m in diameter. The lahar had a minor sulfur odor. During 12-15 November explosions from the Santiaguito lava-dome complex generated ash plumes that rose to 800 m above the complex and drifted SW. Ashfall was reported in areas downwind, including Monte Claro, San José, and la Quinta.


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