Volcanos

Roundup of Global Volcanic Activity

Sakurajima (Kyushu, Japan): Over the past days, vulcanian-type explosions have again picked up in number and size, after only very few events during the first 3 weeks of March. Ash plumes rose to up to 10-12,000 ft (3-3.6 km) altitude. The remarkable novelty is that most of the recent explosions occurred from the Minamidake crater, the volcano’s old summit vent, and not from the Showa crater on its eastern flank, which had been (an almost exclusive) protagonist during the 10 years since 2006 until very recently.

Santiaguito (Guatemala): Activity continues at the Caliente lava dome with little changes. The volcano observatory reported strong degassing, some weak to moderate explosions with ash plumes rising up to approx. 900 m and constant block lava avalanches on the eastern and southeastern flanks of the lava dome. The latter suggests that effusive activity has been elevated recently compared to during previous months.

Pacaya (Guatemala): Mild activity continues at the intra-crater cone of the Mackenney crater. INSIVUMEH reports a steam and gas plume rising 600 m and glow from lava visible at night.

Fuego (Guatemala): After its latest paroxysm a few days ago, activity of the volcano has returned to normal levels with intermittent (one every few hours) weak to moderate-sized strombolian explosions. During the past week, activity at the volcano gradually increased into the 5th paroxysm in 2016, generating pulsating lava fountains, lava flows and possibly pyroclastic flows. After the previous such episode in early March, the volcano had continued to produce its typical, persistent, but intermittent strombolian activity. The latter started to become more and more intense from around 22 March, and became near-constant during 24-25 March.

Momotombo (Nicaragua): A slight increase in activity occurred last week between 23-26 March, when the volcano again produced some mild to moderate explosions, some of which were strong enough to send bombs to its upper outer slopes. During the past days, activity has again been calmer, although crater glow continues to tell the presence of fresh lava in the summit crater.

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