Volcanic activity worldwide 19 Oct 2013: Klyuchevskoy, Tungurahua

Klyuchevskoy (Kamchatka): Strong explosive and effusive activity continues. KVERT monitors the situation closely and issues alerts every few hours. Last evening, ash emissions again reached almost 30,000 ft (8-9 km) altitude. "The ash plume this morning has decreased in height to 21,300-24,600 ft (6.5-7 km) a.s.l. but by now, an ash plume dangerous for aviation is extending about 736 mi (1188 km) to the south-east and east of the volcano (satellite data at 0135 UTC on October 19, 2013)." Video of last night's impressive activity with lava fountains and lava flows all over the flanks of the volcano:

Stronger explosions can occur any time.

Tungurahua (Ecuador): The eruptive phase that had started on 6 Oct, after a quiet interval of 3 months, continues to increase. The volcano observatory reports ash columns rising up to 3 km above the crater and the first occurrence (so far) small pyroclastic flows.
In the early days of this phase, seismic activity was characterized by an increase in the number and energy of the events related to the mobilization of fluids into the volcano such as long-period events, tremor and explosions and emission signals of variable magnitude. Superficially, low intensity strombolian activity and ash emissions could be observed, resulting in ash fall in the areas of El Manzano, Bilbao, Chacauco , Choglontús , Mocha, Pillate and on the upper slopes of the volcano itself.

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Seismicity peaked last Friday (11 Oct) when explosions and emissions generated emission columns of 500-2000 meters above the crater, with a low content of ash, causing further ash fall in several areas around the volcano.
Since past Monday (14 Oct), the number of explosions and seismic signals related to fluid movements has increased significantly again. Explosions were small to moderate and generated noises heard in several areas around the volcano. On Tuesday afternoon, two small pyroclastic flows formed during larger emissions, traveling a few hundred meters on the upper slope towards the Achupashal drainage.