Anak Krakatau volcano erupted at 06:05 UTC on June 8, 2022, with the height of the ash column observed ± 500 m (1 640 feet) above the peak (± 657 m / 2 155 feet above sea level). The Alert Level remains at 3 and the Aviation Color Code at Orange.
The ash column is observed to be gray in color with thick intensity towards the south.
This eruption was recorded on a seismograph with a maximum amplitude of 50 mm and a duration of 75 seconds.
People/visitors/tourists/climbers are advised not to approach the volcano or engage in activities within a 5 km (3.1 miles) radius of the active crater.1
The Darwin VAAC reported that on May 18 a diffuse ash plume from Anak Krakatau rose to 2.4 km (8 000 feett) a.s.l. and drifted WNW based on satellite images and weather models.
On May 19 a dense steam plume with diffuse ash rose to 2.4 km and drifted N.
Volcanic activity at Anak Krakatau intensified in April 2022, culminating with intense explosive eruptions on April 24:
The renowned volcano Krakatau (frequently misstated as Krakatoa) lies in the Sunda Strait between Java and Sumatra. The collapse of the ancestral Krakatau edifice, perhaps in 416 CE, formed a 7 km (4.3 miles) wide caldera.
Remnants of this ancestral volcano are preserved in Verlaten and Lang Islands; subsequently Rakata, Danan and Perbuwatan volcanoes were formed, coalescing to create the pre-1883 Krakatau Island. Caldera collapse during the catastrophic 1883 eruption destroyed Danan and Perbuwatan volcanoes and left only a remnant of Rakata volcano.
This eruption, the 2nd largest in Indonesia during historical time, caused more than 36 000 fatalities, most as a result of devastating tsunamis that swept the adjacent coastlines of Sumatra and Java. Pyroclastic surges traveled 40 km (25 miles) across the Sunda Strait and reached the Sumatra coast.
After a quiescence of less than a half-century, the post-collapse cone of Anak Krakatau (Child of Krakatau) was constructed within the 1883 caldera at a point between the former cones of Danan and Perbuwatan. Anak Krakatau has been the site of frequent eruptions since 1927.2
1 Anak Krakatau volcano update – PVMBG – June 8, 2022
2 Krakatau – Geological summary – GVP
Featured image credit: PVMBG
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