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Ubinas vulkaan
Stratovulkaan 5672 m (18,609 ft)
Peru, -16.36°S / -70.9°W
Current status: restless (2 out of 5)
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Ubinas vulkaanuitbarstingen:
2014-16, 2009-2010, 2006-08, 1969, 1956, 1951, 1937, 1907, 1906, 1869, 1867, 1865, 1862, 1830, 1826(?), 1784, 1677, 1662, 1600, 1550 ± 50y
Typical eruption style:
Explosieve
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News from Ubinas volcano:

Ubinas volcano (Peru): phreatic eruptions

wo, 4 sep 2013, 06:36
06:36 AM | DOOR: T
The volcano woke up with a series of small ash explosions over the past days. The first and largest occurred on Sunday (1 Sep) and 4 smaller ones followed on Monday and Tuesday.
According to the scientists from Instituto Geofísico del Perú (IGP) the explosions were purely phreatic, i.e. driven by overheated steam following increased snowfall at the crater, and not related to the rise of new magma.
The new activity follows a similar event earlier this summer, when a pilot reported a small ash plume, which was the first observed activity since 2010.
Seismic data do not suggest that a larger eruption is in progress. However, if snow falls continue on Ubinas, similar explosions are likely to occur in the near future.
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Koppelingen / Bronnen:
  • Volcán Ubinas en sur de Perú registra cinco explosiones en tres días (El Nuevo Herald)
Vorig nieuws
Thu, 15 Jan 2009, 23:07
On 11 January there was an ash plume at Ubinas that was rosing to an altitude of 7.3 km. ... Lees alle
Fri, 31 Oct 2008, 14:49
There are still continuously emitted ash plumes that rose to altitudes of 5-7 km. ... Lees alle
Thu, 23 Oct 2008, 11:10
Ubinas continues to produce near-continuous strong ash explosions that produce plumes rising to altitudes of 5-7 km (16,000-23,000 ft) a.s.l., which over the past week mostly drifted SE and NW. ... Lees alle
Sun, 14 Sep 2008, 21:43
Based on SIGMET reports and pilot observations, the Buenos Aires VAAC reported that during 5-6 September ash plumes from Ubinas rose to altitudes of 5.5-6.4 km (18,000-21,000 ft) a.s.l. and drifted NE and SE. Geologic Summary. A small, 1.2-km-wide caldera that cuts the top of Ubinas, Peru's most active volcano, gives it a truncated appearance. Ubinas is the northernmost of three young volcanoes located along a regional structural lineament about 50 km behind the main volcanic front of Peru. The upper slopes of the stratovolcano, composed primarily of Pleistocene andesitic lava flows, steepen to nearly 45 degrees. The steep-walled, 150-m-deep summit caldera contains an ash cone with a 500-m-wide funnel-shaped vent that is 200 m deep. Debris-avalanche deposits from the collapse of the SE flank of Ubinas extend 10 km from the volcano. Widespread Plinian pumice-fall deposits from Ubinas include some of Holocene age. Holocene lava flows are visible on the volcano's flanks, but historical activity, documentedsince the 16th century, has consisted of intermittent minor explosive eruptions. ... Lees alle
Thu, 21 Aug 2008, 17:47
On 18 August ash plumes from Ubinas rose to altitudes of 5.5-6.4 km (18,000-21,000 ft) a.s.l. and drifted W. ... Lees alle

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