Mi, 30. Mär 2005, 08:41
Eruptive and seismic activity at Klyuchevsky volcano, neighbour of Sheveluch (also active at the time of writing) has decreased but remains. According to press reports, strong strombolian explosions from the summit crater eject ash and blocks to up to 1000 m above the crater and lava flows are travelling down the upper flanks, interacting with ice and snow, that produce secondary ash clouds.
It cannot be excluded that stronger explosions from the summit crater occurr with no or little warning; they could produce ash plumes that reach as high as 7-8 km or 23,000-26,200 ft above sea level and travel many tens or hundreds of kilometers downwind.
Klyuchi settlement is situated between Shiveluch and Klyuchevsky and receives periodically light ash fall, but the settlement is still being regarded "safe".
Mi, 30. Mär 2005, 08:08
As the Russian agency Novosti and the Alaska Volcano Observatory report, Sheveluch volcano, Kamchatka (Russia), is remains highly active. After the violent eruption on February 27, 2005, that destroyed the upper parts of the lava dome, thus lowering the total height of the mountain by 200 m, the lava dome has re-grown by more than 50 m during the past 20 days and keeps increasing. The rapid growth, caused by continuing influx rate of fresh magma, triggers frequent hot rockfalls and small pyroclastic flows.
Mi, 30. Mär 2005, 06:00
During 29 March to 3 April, the lava lake inside Villarrica's crater remained active, with Strombolian explosions occurring. Some gas explosions were observed to hurl volcanic bombs as far as ~300 m.
Mi, 30. Mär 2005, 06:00Ash emissions began from Canlaon on 20 March around 1300. Small amounts of ash fell in the town of Guintubdan 5 km W of the volcano. During 24 March to 4 April, sporadic ash emissions rose to a maximum height of 1 km above the volcano (11,300 ft a.s.l.).
Mi, 30. Mär 2005, 06:00
On 6 April around 0300 an explosive eruption began at Anatahan and produced an ash plume to an initial height of ~15.2 km (~50,000 ft) a.s.l. On 5 April at about 2200 seismic signals began to increase slowly and the Washington VAAC began to see increased ash on satellite imagery. The seismicity peaked on 6 April around 0300.
Mi, 30. Mär 2005, 06:00During 30 March to 4 April, volcanic and seismic activity were at relatively low levels at Tungurahua. Low-energy gas-and-steam plumes were emitted, and long-period earthquakes were recorded.
Mi, 30. Mär 2005, 06:00
Growth of the new lava dome inside the crater of Mount St. Helens continued, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. As has happened on several occasions during the lava-dome-building phase of the eruption, a series of large (equal to or greater than M 3) earthquakes occurred during 3-4 April, in addition to the typical array of smaller events.
Mi, 30. Mär 2005, 06:00The lava dome at Shiveluch continued to grow during 25 March to 1 April. Gas-and-steam plumes rose to 1.5 km above the ~2.5-km-high lava dome (~13,100 ft a.s.l.) on several days. Between 5-28 March a new lava extrusion added ~50 m height to the SW part of the lava dome.
Mi, 30. Mär 2005, 06:00
Seismic activity was above background levels at Kliuchevskoi during 25 March to 1 April. Ash-and-gas plumes rose 2.5-3 km above the crater (24,100-25,700 ft a.s.l.). Incandescence was observed above the summit crater on 28 March. Kliuchevskoi remained at Concern Color Code Orange.
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Mi, 30. Mär 2005, 06:00Lava from Kilauea continued to flow into the ocean at several points during 1-4 April. Seismicity remained above background levels at Kilauea's summit, consisting mainly of tremor and some long-period earthquakes. Volcanic tremor was at moderate levels at Pu`u `O`o.
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Mi, 30. Mär 2005, 06:00
During 25 March to 1 April, seismicity at Karymsky was above background levels, with 110-500 daily shallow earthquakes. Possible ash-and-gas explosions rose to 1,000-1,500 m above the crater (8,300-10,000 ft a.s.l.) Explosions occurred from two craters at the volcano's summit on 29 March, sending E-drifting ash-and-gas plumes to 1 km above the crater (8,300 ft a.s.l.). Karymsky remained at Concern Color Code Orange.
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Mi, 30. Mär 2005, 06:00During 30 March to 4 April there were several explosions at Colima. According to the Washington VAAC, resultant ash plumes rose to a maximum height of ~6.7 km (~22,000 ft) a.s.l.
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Mi, 30. Mär 2005, 06:00
Ash from Chikurachki fell on the southern part of Paramushir Island on 29 March. Ash deposits were visible on satellite imagery on 25 and 29 March. Deposits on the 29th extended 19 km SE. Chikurachki remained at Concern Color Code Orange.
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So, 27. Mär 2005, 10:59
On the 26th of March, the Civil Protection authorities have partially re-openend access to Stromboli's summit area, which had formally been off-limits since the eruption and landslide in late December 2002. Access is free until 400m elevation without an authorized guide, and above that it is permitted to visit the summit area if accompanied by an authorized mountain guide, but the stay in the summit area is limited to 1 hour total duration and only until 11pm.
Do, 24. Mär 2005, 19:41
The Russian news agency Novosti reports a strong eruption by Sheveluch volcano on March 23, 2005, that destroyed a camp of vulcanologists and the seismic station at Baidarnaya, located eight kilometers from the volcano.
According to this report, a significant part of the lava dome at the summit has collapsed, and generated a massive flow (probably a pyroclastic flow, not a lava flow as stated ?) that travelled down the slope more than 20 kilometers long. There were no people in the area during the event. According to the news agency, this eruption would be the largest since Sheveluch's disastrous eruption of 1964.
Do, 24. Mär 2005, 19:34
As KVERT (Kamchatkan Volcanic Eruptions Response Team) reports, the eruption at Klyuchevkoy volcano in Kamtchatka has increased dramatically:
"Continuous explosions from the summitcrater could produce ash plumes that reach as high as 10 km or 32,800 ft above sea level and travel many tens or hundreds of kilometers downwind. The current activity of the volcano is very dangerous to aviation. <...>Seismic activity of the volcano has increased. <...> According to visual and video data, agas-steam plume containing some amounts of ash rose up to ~7500 m (24600ft) ASL on March 22 and up to ~ 8500 m (27,800 ft) ASL on March 23, extending to the north-west. There was ash fall at Kluchi from 18:45 till present time on March 23. According to data from AMC Yelizovo, an ash plume rising up to 7,000 m (23, 000 ft.) ASL and extending 70-80 km (44 -50 mi) to the north-west was observed by pilots of aircraft AN-72 N 71602 at 23:05UTC on March 23."
Mi, 23. Mär 2005, 06:00
During 25-28 March, volcanic and seismic activity at Ulawun were at low levels. Gas was emitted from the main crater, and low-frequency earthquakes were recorded beneath the volcano. Small-amplitude continuous volcanic tremor was recorded during 27-28 March.
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Mi, 23. Mär 2005, 06:00On 24 March KVERT raised the Concern Color Code at Kliuchevskoi to Red (the highest level) due to an increase in seismic and volcanic activity. According to visual and video data, a gas-and-steam plume containing ash rose to ~7.5 km (24,600 ft) a.s.l. on 22 March, and ~8.5 km (~27,900 ft) a.s.l. on 23 March, extending NW.
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Mi, 23. Mär 2005, 06:00
On 25 March, KVERT raised the Concern Color Code at Chikurachki from Yellow to Orange. On 23 March, satellite imagery showed a weak ash plume extending ~70 km (~44 mi) E of the volcano. The height of the plume was unknown.
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Mi, 23. Mär 2005, 06:00During 23-28 March, volcanic and seismic activity were at relatively low levels at Tungurahua. Low-energy gas-and-steam plumes were emitted, and long-period earthquakes were recorded.
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Mi, 23. Mär 2005, 06:00
During 23-29 March, growth of the new lava dome inside the crater of Mount St. Helens continued, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. CVO noted that during such eruptions, episodic changes in the level of activity can occur over days to months.
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Mi, 23. Mär 2005, 06:00The lava dome at Shiveluch continued to grow during 18-25 March. A lava flow traveled from a portion of the lava dome that was destroyed during an eruption on 28 February. During the report period, gas-and-steam plumes rose to ~1 km above the 2.5-km-high lava dome (~11,500 ft a.s.l.).
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Mi, 23. Mär 2005, 06:00
During 22-28 March, eruptions continued at Rabaul caldera's active Tavurvur cone every 10-20 minutes. These intervals were longer than during the previous weeks. Ash clouds rose several hundred meters above the summit.
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Mi, 23. Mär 2005, 06:00Mild eruptive activity continued at Manam during 22-28 March. Weak-to-moderate emissions from both the Main and Southern craters continued to produce occasional ash clouds during most days. On 24 March, emissions from Main Crater rose to ~1 km above the summit (~9,200 ft a.s.l.).
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Mi, 23. Mär 2005, 06:00
On 29 March lava from Kilauea entered the ocean at five ocean entries. The largest, named Kamoamos, consisted of six or more places where lava entered the water along the front of a growing lava delta. A cascade of lava streamed down the old sea cliff at one of the two Highcastle entries.
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Mi, 23. Mär 2005, 06:00There was no seismic activity at Ebeko during 18-25 March, so KVERT reduced the Concern Color Code from Yellow to Green, the lowest level.
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Mi, 23. Mär 2005, 06:00
During 23-29 March there were several ash emissions from Colima. Resultant ash plumes rose to a maximum height of ~7.6 km (~24,900 ft) a.s.l.
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Mi, 23. Mär 2005, 06:00The third eruption in 2005 at Anatahan apparently began on 21 March when seismicity increased. Seismic amplitudes peaked on the 25th and faded out on the 26th. Near the peak on the 25th, the Air Force Weather Agency detected a hot spot on the island on satellite imagery, and reported an ash plume briefly reaching ~5.8 km (~19,000 ft) a.s.l.
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