7 Natural Phenomena that Appear After the eruption of Mount Anak Krakatau
ACEHINMEMORIES.COM - The activity of Gunung Anak Krakatau is still a concern.7. Orange sea water appears.
It is known that the sea water around Mount Anak Krakatau is very hot.
This can be seen from the hot steam rising from sea water.
In addition, the surrounding sea water also changes color to orange.
According to Sutopo's explanation, this change in sea water to orange is due to the high iron content of the crater of Mount Anak Krakatau which then enters the seawater around it. (*)
Although the number of eruptions has tended to decline, Mount Anak Krakatau is still in standby status with a dangerous zone 5 kilometers from the top of the crater.
Since the eruption some time ago, various natural phenomena have appeared on Mount Anak Krakatau.
Starting from the emergence of the Sunda Strait tsunami until the most recent is orange water.
Here is a row of natural phenomena that emerged after the eruption of Mount Anak Krakatau
1. Sunda Strait Tsunami.
Anyer coastal area, Banten province, until Lampung was hit by the Tsunami wave on Saturday night (12/22/2018) at 21.30 WIB.
The Banten tsunami that came suddenly without being followed by the earthquake was allegedly due to the volcanic activity of Gunung Anak Krakatau.
2. Thousand Islands Filled with Gravel to Look Like the New Plains.
volcanic material eruption of Mount Anak Krakatau was found drifting to the coast of Coconut Island, Kelapa Dua Island and Harapan Island, Thousand Islands since Wednesday (12/26/2018) yesterday.
Coordinator of Pulau Harapan Beach Coastal Field, LH Sub-Department of Kepulauan Seribu, Surya Ismail, said that the volcanic material was in the form of gravel.
"The form of fine gravel is only floating on the sea. The size is not big, like green beans," Surya said when contacted by Kompas.com on Thursday (12/27/2018).
According to Surya, the drift of gravel was caused by the movement of wind from the southwest to the northeast.
Gunung Anak Krakatau itself is located 70 miles southwest of the Thousand Islands.
3. The height of the mountain shrinks.
The eruption that occurred on Mount Anak Krakatau caused a shrinkage in the height of the Anak Krakatau mountain.
From the original 338 meters above sea level (masl) to only 110 meters above sea level.
The reduced body volume of the Anak Krakatau mountain is estimated to be due to the volcanic body crawling process accompanied by a high eruption rate from 27 to 28 December 2018.
4. Finding 2 new cracks in the body of Gunung Anak Krakatau.
The shrinking of the height of Mount Anak Krakatau was accompanied by the discovery of two new cracks in the body of Mount Anak Krakatau.
The head of BMKG, Prof. Dwikorita Karnawati said there were two new cracks in a straight line on one side of the body of Gunung Anak Krakatau. Dwikorita suspected that the crack occurred because of the high vibration that appeared during the eruption of Anak Krakatau volcano.
The appearance of the new cracks made the BMKG worry that there would be a subsequent tsunami.
This is due to the underwater conditions of Mount Anak Krakatau when there are ravines on the west to south.
"What we worry about is under a steep sea, on a gentle slope.
If the crack is connected, then there is vibration, this can be pushed and can collapse (landslide), "said Dwikorita explained.
5. The crater basin resembles a bay.
After the eruption of Mount Anak Krakatau, the Indonesian Navy (Navy) found unusual sightings on the seabed of the Sunda Strait.
The Navy's Hydrographic and Oceanographic Center (Pushidrosal) discovered the silting of the seabed in the Sunda Strait.
Not only found the siltation of the seabed, the Navy also mentioned a change in the morphological form of Mount Anak Krakatau after the eruption and landslides that caused a tsunami in the waters of the Sunda Strait last Saturday (12/22/2018).
The results were obtained after the KRI Rigel-933, which was a survey ship under the guidance of Pushidrosal, conducted a hydro-oceanographic and investigative survey in the area of Mount Anak Krakatau landslide after the eruption and tsunami in the waters of the Sunda Strait.
According to Kapushidrosal Laksda TNI Dr. Ir. Harjo Susmoro, S.Sos., S.H., M.H. from data from the 2016 Pushidrosal hydro-oceanographic survey and Multi Beam Echosounder (MBES) data from the Pushidrosal Team Survey on December 29-30, 2019, the waters south of Gunung Anak Krakatau have a contour depth change of 20 to 40 m more shallow.
Of course this is due to the magma spill and the avalanche material of Mount Anak Krakatau which immediately fell into the sea.
"In addition, with visual radar observations and analysis of the images found morphological changes in the shape of the Mount Krakatau Son on the western side covering an area of 401,000 m2 or approximately one third of the slope has disappeared and become a crater basin resembling a bay. In the crater basin, there is still a burst of magma from Mount Anak Krakatau originating from underwater, the sea, "Kapushidrosal said when he was directly observing KRI Rigel in Banten waters.
6. The mountain peak is gone.
After the Sunda Strait tsunami, Gunung Anak Krakatau has indeed erupted many times until its status has risen to level III alert on December 27, 2018.
The crater peak of Mount Anak Krakatau seems to have lost a lot.
The height of the crater of Mount Anak Krakatau also looks almost the same as the sea level.
While the highest wall is only 110 meters above sea level (masl) than before the tsunami, which reached 338 masl.
While the crater wall is only left about 110 meters above sea level.
7. Orange sea water appears.
It is known that the sea water around Mount Anak Krakatau is very hot.
This can be seen from the hot steam rising from sea water.
In addition, the surrounding sea water also changes color to orange.
According to Sutopo's explanation, this change in sea water to orange is due to the high iron content of the crater of Mount Anak Krakatau which then enters the seawater around it. (*)
Editor : Saiful Bahri
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