Tuesday, 8 July 2014

Volcanos

Roundup of Global Volcanic Activity

Etna (Sicily, Italy): The lava flow continues to advance slowly from the new fissure vent into the Valle del Leone. Tremor has been rising gradually overall, but is still low. 

Shiveluch (Kamchatka): Several small to moderate explosions occurred at the active lava dome during the past days. Ash plumes were reported to up to 27,000 ft (8 km) altitude.

Sakurajima (Kyushu, Japan): The volcano had a busy weekend with at least 6 explosions during 48 hours. The largest produced an ash plume to 12,000 ft (3.6 km) altitude.

Batu Tara (Sunda Islands, Indonesia): Explosive activity has been pronounced during the past days. Several ash plumes were spotted on satellite data, indicating relatively strong strombolian eruptions.

Sangeang Api (Indonesia): Activity continues at least intermittently. An ash plume at estimated 9,000 ft (2.7 km) altitude was observed Friday extending almost 100 km to the NW (VAAC Darwin).

Santa MarĂ­a / Santiaguito (Guatemala): According to INSIVUMEH, a "very strong and prolonged" earthquake occurred under the volcano this morning at 05:25 local time. Paintings in houses were bouncing and small landslides occurred in steep river bed sides. The earthquake also triggered small avalanches on the steep flanks of the active Caliente lava dome. Last night, an explosion with visible incandescent material occurred at 18:57. During the night, intermittent glow could be seen from the summit area of the dome. Incandescence was also observed from the upper eastern flank of the dome, where a blocky lava flow continues to be weakly active.

Fuego (Guatemala): The latest lava flow seems to have stopped. The volcano remained in its typical persistent type of activity, with intermittent mostly weak to moderate strombolian explosions. Incandescent material was ejected to 50-100 m and ash plumes rose up to 400 m above the summit. Strong jet-like degassing noises accompany the eruptions.

Ubinas (Peru): The volcano has been very calm except for one or very few small ash explosions during the past days.

Nyamuragira (DRCongo): The new eruption continues in the form of a lava lake in the summit caldera. No evidence of lava flowing on the flanks of the giant volcano is availabe. Thermal satellite data show the hot spot at the summit and a large SO2 plume from both Nyamuragira and neighbouring Nyiragongo, which also has a (very active) lava lake, are evidence of this. Unfortunately, the area of both volcanoes is still unsafe to travel to.

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