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Reventador volcano (Ecuador) - Smithsonian / USGS Weekly Volcanic Activity Report for 5 November-11 November 2008 (New Activity / Unrest)

Ср, 5 ноя 2008, 06:00
The IG reported that SOTE (Sistema de Oleoducto Transecuatoriano) personnel and residents near Reventador observed incandescence in the crater on 7 November. The reports were confirmed by the presence of thermal anomalies in satellite imagery. The next day, seismicity increased and a steam-and-ash plume rose to an approximate altitude of 5.6 km (18,400 ft) a.s.l. and drifted SW.
Incandescent blocks were ejected from the inner crater to the S. Residents in El Chaco (about 35 km SE) and in the Quijos area heard strong explosions and saw steam plumes with low ash content. A pilot reported that a steam plume with little ash content at an altitude of 7.6 km (25,000 ft) a.s.l. drifted NW.
On 9 November incandescent blocks were ejected 100 m into the air, and roaring and "cannon shot" sounds were reported. Strombolian activity and two lava flows that descended the N and S flanks of the central cone were observed using a permanent camera. Slight ashfall was noted in Cayambe, about 55 km WNW.
A thermal anomaly was detected by satellite imagery on 9 and 10 November. On 10 November, seismicity considerably decreased and gas emissions continued. The lava flows continued to advance.

According to a news article, officials suspended flights into Quito airport due to ash plumes on 10 November for three hours as a preventative measure.

Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC), Associated Press
From: Global Volcanism Program, 2008. Report on Reventador. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 5 November-11 November 2008. Smithsonian Institution and US Geological Survey.

Предыдущие новости

Wed, 6 Aug 2008, 06:00
The IG reported that steam-and-gas from Reventador was emitted during 6-8 August. Incandescence from the crater was observed at night on 8 August. ... Read all
Wed, 30 Jul 2008, 06:00
The IG reported that seismicity from Reventador decreased during 30-31 July. On 31 July, steam-and-gas plumes with a low ash content were detected on satellite imagery and drifted W and SW. On 1 August, steam-and-gas plumes were emitted and a lava flow in the caldera was active. ... Read all
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