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Volcanic activity world-wide 9 Aug 2012: White Island and Tongariro in New Zealand, Popocatépetl, Santiaguiro, Fuego, Nevado del Ruiz, Sotarà, Tungurahua, Sakurajima

Thursday Aug 09, 2012 07:27 AM | BY: T

Tongariro volcano in New Zealand has stayed calm. First analysis of the ash confirms that the eruption did not produce any significant amount if at all of fresh magma, and therefore was so-called phreatic.

Small ash emissions continue at White Island. GSN scientists made a visit to the island early today and confirmed that the volcano was in eruption and producing a small plume of ash from the vent in Crater Lake. This is the first ash since February 2001.
GeoNet stresses that it is a small eruption (at least so far), but visitors to the island are at high risk.

In Guatemala, Fuego volcano remains at moderate levels of activity with a decreasing trend. The lava flow toward Taniluya Canyon remains active, but has become shorter (currently 150 m). INSIVUMEH lists 7 weak explosions in the report from 8 Aug, which produced ash columns rising 200 m, accompanied by rumbling noise and degassing lasting between 1 to 5 minutes.

Santiaguito / Santa Maria (Guatemala): Constant avalanches and active lava flows are present from the northeast, southeast, southwest and south and west flanks of the dome, which can be seen glowing at night. The rockfall signal is currently well visible on the seismogram. Only 2 weak explosions were recorded yesterday at 05.10 and 5:50 pm producing gray ash plumes rising 300 m.

Continuing shallow volcanic quakes and degassing from fumaroles, producing a 100 m high plume of bluish-white gas above the crater, are the only current signs of activity from Pacaya volcano.

Popocatépetl in Mexico has had no sigificant explosions during the past day, only weak steam and gas emissions with sometimes minor quantities of ash. Glow is visible at night.

In Colombia, Sotarà volcano was placed on eruption warning (orange) by INGEOMINAS, following an increase in shallow earthquakes recorded recently under the volcano.
Nevado del Ruiz (Colombia) remains at orange alert, and shows an elevated tremor signal, probably corresponding to ongoing degassing and occasional ash venting.

Tungurahua volcano (Ecuador): An slight increase in seismicity can be observed at Tungurahua, but so far, no major explosions have occurred and the volcano is primarily steaming.

Sakurajima volcano: 2 moderately large explosions occurred at Sakurajima early today and produced ash plumes reaching 10,000 ft (3 km) altitude.

According to Aris on facebook, who climbed Mt Slamet volcano in West Java on 4 Aug, this volcano erupted only from July 13 to July 18, and has been quiet again since. Strong degassing is visible from the summit crater.
Previous news
Wednesday, Aug 08, 2012
New Zealand's 2 currently active volcanoes dominate the volcano-related headlines of news in the world: ... [more]
Strombolian eruption from Etna's Bocca Nuova on 5 Aug
Tuesday, Aug 07, 2012
News have been dominated by Tongariro volcano's first eruption in 115 years (New Zealand). At the moment, the volcano is quiet, but eruptions could resume any time. ... [more]
Strong spattering and a lava flow from the new cone in the eastern vent of Bocca Nuova on the evening of 3 Aug 2012
Saturday, Aug 04, 2012
No major volcanic activity is happening at the moment. Here are some updates on current activity at some volcanoes, most of which are semi-permanently active: ... [more]
SO2 plume from Kilauea volcano on 30 July (NOAA)
Thursday, Aug 02, 2012
Yasur (Vanuatu) has shown an increase in activity and was set on alert level 3, meaning that the access to the crater is currently closed, as bombs are falling outside the crater rim and into the car park area. ... [more]
Wednesday, Aug 01, 2012
Etna (Italy): The strombolian activity in Bocca Nuova continues and the intracrater cone slowly grows. At the moment, the tremor is slowly rising, suggesting an increase in activity. ... [more]

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