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Poros Pos . Increased activity of Gunung Anak Krakatau since December 22, 2018 was monitored significantly until finally the mountain status was raised from alert to standby. On that same day, at night, there was a mountain slope which allegedly triggered a tsunami to hit Banten and South Lampung. Secretary of the ESDM Geological Agency Antonius Ratdomopurbo said the Anak Krakatau eruption had not stopped since then. In addition, he said there was a change in the pattern of eruption activities. "Then the status is increased because of course it provides a broader potential of power than we declare vigilant," Antonius said in his office, Jalan Medan Merdeka Selatan, Central Jakarta, Thursday (12/27/2018). The change in the eruption pattern is called changing from strombolian to surtseyan. Strombolian means explosive eruptions throwing incandescent stones because there is pressure from inside the crater. Whereas the surtseyan type currently experienced by Anak Krakatau means la...

Kolom Nasional . Anak Krakatau appeared in 1927, 40 years after the eruption of Mount Krakatau in 1883. The emergence of the Son of Krakatau occurred because the caldera region of Mount Krakatau which erupted in 1883 still continued to issue magma. The lava coming out of the magma bag froze and continued to accumulate so that it was termed growing. Anak Krakatau has increased this mountain due to material coming out of the mountain's stomach. This is a type of mountain growth by means of extrusion which is the accumulation of material eruptions that cause the volcano to grow outside. Volcanoes are built in this way mainly from two ingredients: lava and ash. The other way of mountain growth is by intrusion. In this way, the magma moves up to the volcano without erupting. So, the mountain grows from the inside, as quoted from the page of the University of Oregon State, United States. This mountain grows an average of 8.9 meters per year or 70 cm per month. According to Discovery Volc...

Fokus Pos . Gunung Anak Krakatau has released black smoke and hot clouds since Friday (12/28) morning. The report was based on observations of the observation station on Sertung Island. The Head of Observation Post at Gunung Anak Krakatau Windi Cahya Untung delivered a hot cloud towards the Indian Ocean. The booming sound also accompanies volcanic activity. "Strong pressure crater smoke was observed to be black with thick and high intensity of 200-600 meters above the crater peak. Heat clouds were observed to the south," Windi said on Friday (12/28). Anak Krakatau was not visible from the Observation Post because it was covered in clouds. Windi said that currently the weather around Anak Krakatau is cloudy and cloudy. Seismic activity also never stops. "Tremor continuous or microtremor recorded with an amplitude of 8-35 millimeters, dominant 20 millimeters," he said. See also: BMKG Ensure There Are No Potential Tsunamis in Some Regions He asked residents and tourist...