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The pyroclastic flow (lower right) and ash plume from Shiveluch volcano yesterday morning
) The volcano's activity seems to have picked up a bit compared to recent weeks. A partial collapse of the active dome generated a pyroclastic flow that traveled several km to the south, accompanied by an ash plume that rose to 4-4.5 km altitude and drifted east.
Fri, 30 Oct 2015, 07:23Another (the third) eruptive phase began at the volcano yesterday evening. From 16:00 local time, the volcano observatory recorded an increase in tremor and new lava was seen in the vent after 20:00.
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The pyroclastic flow (lower right) and ash plume from Shiveluch volcano yesterday morning
The volcano's activity seems to have picked up a bit compared to recent weeks. A partial collapse of the active dome generated a pyroclastic flow that traveled several km to the south, accompanied by an ash plume that rose to 4-4.5 km altitude and drifted east.
Fri, 30 Oct 2015, 06:45Seismic unrest continues at the volcano, but at lower levels than during mid-late summer, HVO reports:
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Strombolian activity inside Etna's Voragine crater (photo: Biagio Ragonese / EtnaWeb)
) After several weeks of calm, new activity has started during the past days inside the central Voragine crater. Mild strombolian explosions have been observed from a vent at the bottom of the crater.
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Steam emissions and glow from Cotopaxi this morning
No significant changes in the volcano's activity have occurred. According to monitoring scientists from IGEPN, it seems that magma is slowly rising inside an open-conduit system.
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Strombolian activity inside Etna's Voragine crater (photo: Biagio Ragonese / EtnaWeb)
After several weeks of calm, new activity has started during the past days inside the central Voragine crater. Mild strombolian explosions have been observed from a vent at the bottom of the crater.
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Small strombolian explosion at Ibu yesterday
Our recent group who visited the volcano reports small to moderate explosion from the central vent at intervals of 5-20 minutes.
Wed, 28 Oct 2015, 06:00
Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 27 October-2 November seismicity at Ubinas fluctuated; the level of long-period earthquakes remained high and continued to increase, while hybrid and volcano-tectonic signals also increased but remained at low levels. Steam-and-gas plumes with some ash rose from the crater. Thermal anomalies were detected on 30 October and 1 November.
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Wed, 28 Oct 2015, 06:00IG reported high seismic activity at Tungurahua during 28 October-2 November, characterized by long-period events, volcano-tectonic events, and signals indicating emissions; cloud cover often prevented visual observations. Several minor ash emissions were visible on 29 October, and ashfall was reported in Choglontus (13 km WSW) and Manzanó (8 km SW). Steam, gas, and ash plumes rose as high as 1.5 km above the crater during 30 October-3 November and drifted E, NE, NW, and SW.
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Wed, 28 Oct 2015, 06:00
Based on information from PVMBG, the Darwin VAAC reported that during 30-31 October ash plumes from Sinabung rose to altitudes of 3.4-7.6 km (20,000 ft) a.s.l. Plumes drifted over 35 km W on 31 October.
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Wed, 28 Oct 2015, 06:00AVO reported that seismicity at Shishaldin continued to be slightly elevated over background levels during 28 October-2 November, indicating that low-level eruptive activity confined to the summit crater continued. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
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Wed, 28 Oct 2015, 06:00
KVERT reported that during 23-30 October lava-dome extrusion onto Sheveluch's N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images detected a daily and intense thermal anomaly over the dome. Explosions and hot avalanches generated ash plumes that rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted 80 km E, NE, and NW during 23-24 and 28-29 October.
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Wed, 28 Oct 2015, 06:00INSIVUMEH reported that on 30 October heavy rainfall in the area triggered cold lahars which descended Santa María's Cabello de Ángel (a tributary of Nima I) and San Isidro (tributary of El Tambor) drainages. The lahar in San Isidro carried blocks that were 1-2 m in dimeter. During 30-31 October explosions generated ash plumes that rose 800 m above the crater and drifted SW, causing ashfall in Monte Claro (S).
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Wed, 28 Oct 2015, 06:00
OVPDLF reported that on 29 October the seismic network at Piton de la Fournaise detected a clear increase in background noise, interpreted as tremor. At about 0400 the tremor became continuous and relatively strong. Lava fountains were visible in one of the vents.
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Wed, 28 Oct 2015, 06:00Servicio Geológico Colombiano's (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 27 October-2 November seismicity at Nevado del Ruiz was characterized by long-period earthquakes and short-duration volcanic tremor associated with gas-and-ash emissions. Earthquakes occurred at depths between 1.3 and 8.2 km. The largest event was recorded at 1409 on 31 October; it was a local M 1.3, SW of Arenas Crater at a depth of 2.6 km.
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Wed, 28 Oct 2015, 06:00
Based on observations of satellite imagery and information from RVO, the Darwin VAAC reported that on 29 October ash plumes from Manam rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted over 35 km NW.
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Wed, 28 Oct 2015, 06:00HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 28 October-3 November. The lava lake continued to circulate and spatter in the Overlook vent. The June 27th NE-trending lava flow continued to be active within 2.2-6.3 km NE of Pu'u 'O'o Crater.
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Wed, 28 Oct 2015, 06:00
KVERT reported that moderate explosive activity at Karymsky continued during 23-30 October. Satellite images detected a thermal anomaly over the volcano during 23-24 and 28 October. The Aviation Color Code remained at Orange.
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Wed, 28 Oct 2015, 06:00Based on observations conducted at the Karangetang Volcano Observation Post in the village of Salili, PVMBG reported during 15-22 October activity remained stable. The lava dome was incandescent at night and produced a lava flow that traveled 600 m S. Incandescent avalanches from the lava-flow front traveled as far as 2 km E down the Batuawang and Kahetang drainages, 1 km down the Batang (S) drainage, and 1.8 km down the Kali drainage.
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Wed, 28 Oct 2015, 06:00
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 28 October-3 November ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted 45-100 km SW, W, NW, N, and NE.
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Wed, 28 Oct 2015, 06:00IG reported that although cloud cover often obscured views of Cotopaxi during 28 October-3 November emissions were observed daily; gas, steam, and ash plumes rose as high as 1.5 km and drifted W, SW, S, and E. A small lahar descended the W flank on 31 October.
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Wed, 28 Oct 2015, 06:00
PVMBG reported that seismicity at Colo declined during 1 September-25 October; 1-7 shallow-volcanic earthquakes and 1-3 volcanic earthquakes were recorded per day, which were rates similar to those recorded before a seismic increase in June. The Alert Level was lowered to 1 (on a scale of 1-4) on 26 October, and residents and tourists were warned not to approach the crater.
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Wed, 28 Oct 2015, 06:00Based on satellite images, wind data, and notices from the Mexico City MWO, the Washington VAAC reported that during 31 October-1 November ash plumes from Colima rose to altitudes of 6-6.7.3 km (20,000-24,000 ft) a.s.l. and drifted 20-45 km W and E. On 2 November ash emissions drifted NNE.
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Wed, 28 Oct 2015, 06:00
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 29-30 October ash plumes from Bagana rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted 35-55 km SE, S, SW and W.
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Wed, 28 Oct 2015, 06:00JMA reported that on 30 October and 2 November small-scale events occurred at Showa Crater, at Aira Caldera's Sakurajima volcano. The Alert Level remained at 3 (on a 5-level scale).
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Wed, 28 Oct 2015, 06:00
OVSICORI-UNA reported that ash plumes from Turrialba rose as high as 300 m and drifted WSW on 30 October.
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Wed, 28 Oct 2015, 06:00Based on satellite observations and information from PVMBG, the Darwin VAAC reported that on 31 October an ash plume from Rinjani rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted W before it detached. During 1-3 November ash plumes rose to altitudes of 2.7-4.3 km (9,000-14,000 ft) a.s.l. and drifted as far as 350 km NW, W, WSW, and SW.
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