Remote observations of the 2019–2020 explosive-effusive eruption of Klyuchevskoy volcano

After a large, deadly explosive and effusive eruption during 1963-64, Indonesia's Mount Agung on Bali remained quiet until a new eruption began in November 2017 until 2019. Alert Level III (of four levels) remained in effect throughout the period with a 4 km exclusion radius around the volcano. Massive hysteria occurred when alert level reach the highest level (level IV). The situation get worsed when misinformation has been spreading in social media about Mt. Agung. This research discussing how literate was the Balinese in consuming disaster information. The research was in 2018 used positivisim paradigm. Data collected by using questionnaire with 410 sample from all the regency in Bali Province. Main theory was dependence theory. The result are (1) social media became the most sourceful media to gain disaster information, (2) but the Balinese people didn’t verify the information they gained (3) 30 percent respondent shared the information without verification. It showed Balinese’s literacy in gaining disaster information need to be improve and have a high dependence in using social media.

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The latest volcanism in Nari Caldera, Ulleung Island: Transition from explosive to effusive eruption

Journal of the geological society of Korea ◽

10.14770/jgsk.2020.56.5.539 ◽

2020 ◽

Vol 56 (5) ◽

pp. 539-553

Author(s):

Sang Koo Hwang ◽

So Jin Lee ◽

Young-In Hwang

Keyword(s):

Ulleung Island ◽

Effusive Eruption

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Mechanisms of lava flow emplacement during an effusive eruption of Sinabung Volcano (Sumatra, Indonesia)

Journal of Volcanology and Geothermal Research ◽

10.1016/j.jvolgeores.2018.03.002 ◽

2019 ◽

Vol 382 ◽

pp. 137-148 ◽

Cited By ~ 3

Author(s):

Brett B. Carr ◽

Amanda B. Clarke ◽

Loÿc Vanderkluysen ◽

J. Ramón Arrowsmith

Keyword(s):

Lava Flow ◽

Effusive Eruption ◽

Lava Flow Emplacement

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The age of the Tseax volcanic eruption, British Columbia, Canada

Canadian Journal of Earth Sciences ◽

10.1139/cjes-2019-0240 ◽

2020 ◽

Vol 57 (10) ◽

pp. 1238-1253

Author(s):

Glyn Williams-Jones ◽

René W. Barendregt ◽

James K. Russell ◽

Yannick Le Moigne ◽

Randolph J. Enkin ◽

...

Keyword(s):

British Columbia ◽

Volcanic Eruption ◽

Radiocarbon Dating ◽

Wood Charcoal ◽

Lava Flows ◽

Geochemical Data ◽

Effusive Eruption ◽

Eruptive Episode ◽

Significant Difference ◽

Tephra Deposits

A recent volcanic eruption occurred at Tseax volcano that formed a series of tephra cones in northwestern British Columbia, Canada. The explosive to effusive eruption also formed a 32 km long sequence of Fe-rich Mg-poor basanite–trachybasalt lavas covering ∼40 km2. Oral histories of the Nisg_a’a Nation report that the eruption may have caused as many as 2000 fatalities. The actual eruption date and question of whether there was one or multiple eruptive episodes in the 14th and 18th centuries are, as of yet, unresolved. New radiocarbon dating of wood charcoal from immediately beneath vent-proximal tephra deposits and complementary age information suggest an eruption in 1675–1778 CE (95.4% probability) was responsible for the formation of the tephra cone. New paleomagnetic and geochemical data from the tephra cone and lava flows suggest there is, in fact, no statistically significant difference in time between the explosive and effusive deposits and that they formed during a single eruptive episode.

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