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Cotopaxi Vulkan
Schichtvulkan 5911 m / 19,393 ft
Ecuador, -0.68°S / -78.44°W
Aktueller Status: normal / ruhend (1 von 5)
Cotopaxi Webcams / aktuelle Daten | Berichte
Cotopaxi Vulkan-B cher
Ausbrüche des Cotopaxi:
1942(?), 1940, 1939(?), 1931(?), 1928-30(?), 1905-08, 1903, 1895, 1886, 1885, 1883?, 1883, 1882, 1880, 1879, 1878, 1877, 1870-76, 1870, 1869, 1868, 1867, 1866, 1863, 1860-62, 1859, 1858, 1857, 1856, 1856, 1855, 1854, 1853, 1852, 1851, 1850, 1845, 1844, 1803, 1768, 1766, 1750, 1747-49, 1746, 1744, 1743, 1743, 1742, 1742, 1740-41, 1738, 1698, 1534, 1533, 1532, 1400, 1260, 1130, 950, 770, 760, 740, 550, 370, 180, 140, 110, 70, 80 BC, 230 BC, 1510 BC, 2220 BC, 2640 BC
Typische Aktivität:
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Cotopaxi volcano news & activity updates:

Cotopaxi volcano (Ecuador): new eruption with powerful explosions

Sonntag Aug 16, 2015 11:11 | VON: T

Eruption from Cotopaxi on 14 Aug (photo: Daniel Salazar / twitter)
Eruption from Cotopaxi on 14 Aug (photo: Daniel Salazar / twitter)
The volcano started to erupt, for the first time after more than 70 years, on 14 Aug with a series of 6 very strong explosions. The volcano last erupted in 1940 and possibly 1942. A major hazard of glacier-clad Cotopaxi's eruptions are melt-water floods that can turn in to devastating lahars and threaten an area with approx. 300,000 inhabitants.
The first explosion on 14 Aug occurred at 10:50 local time with an ash plume that rose approx. 8000 meters above the summit crater. During the same day, it was followed by 5 more explosions of similar or smaller size. Some of the explosions produced pyroclastic flows.
The volcano calmed down a bit during yesterday, but had another explosion in the afternoon.
The Ecuadorian government has declared a state of emergency for the area around the volcano and ordered evacuations. During 14 Aug, more than 400 people were evacuated from Loreto del Pedregal village on the northern foot of the volcano.

Precursors of the eruption:
The eruption had been preceded by a brief seismic crisis that started on 13 Aug and culminated in two smaller, probably phreatic explosions at 04:02 and 04:07 in the early morning the same day. Ash from the explosions, which were not observed, but heard, drifted NW and reached up to 40 km distance towards the capital Quito, where it was found as a dusting of fine ash.
During April-June, the volcano had experienced a prolonged period of seismic unrest, with more than 3000 earthquakes during May. This crisis had faded by the beginning of August, but now becomes clear to have been a precursor of the current eruption.
Whether the eruption involves new magma or is purely phreatic in origin remains unclear, but ash analysis will probably give an answer soon.
Vorherige Nachrichten
Mittwoch, Jul 22, 2015
Volcanic unrest continues. Yesterday, the Geophysical Institute registered 105 episodes of volcanic tremor and 3 volcano-tectonic earthquakes. ... [mehr]
Seismic activity at Cotopaxi over the past 20 years (IGPEN)
Mittwoch, Jun 03, 2015
The volcano has been showing signs of unrest. Since mid-April this year, and particularly during May, a marked increased in earthquakes and SO2 emissions have been detected, which could be signs of a magma intrusion beneath the volcano. ... [mehr]

Samstag, Okt 05, 2013
IGPEN surveyed the volcano on 20 Sep. Maximum temperatures in the active crater were found at 55.7 °C and no unusual signs of activity or significant morphological changes compared to recent years were observed. [mehr]
Seismic signal from Cotopaxi (VC1 station, IGPEN)
Montag, Jan 28, 2013
What seems to be a strong seismic swarm has been visible on recent seismograms, but IGPEN has not issued any notes about this otherwise interesting activity, it is suspected that the VC1 station at the NE base of the volcano is either malfunctioning, showing something else or simply having a very strong magnification of normal backgroud seismicity. [mehr]
Small tremors under Cotopaxi (VC1 station, IGPEN)
Mittwoch, Jan 23, 2013
Another pulse of volcanic earthquakes is in progress under Cotopaxi volcano. Such swarms have been occurring several times recently, but for now, can be considered as part of the normal behavior of an active, but currently dormant volcano. [mehr]

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