Other Name: Nini
Name volcano parasites: Angus Stone, Angus Stone New
Types of volcano: Strato
Layout: Ex. Makawidey, district. Aertembaga Bitung
Geography Position G.Tangkoko: 10 31 'N - 1250 11.5' E
Geographical position G. Angus Stone: 10 30.5 'N - 1250 13' BT
High above sea level: G. Nini: 1149 m; G. Angus Stone: 700 m.
A. Form and Structure G. Tangkoko
G. Nini (1149 m) with type Strato has a large crater and the volcano as well as a parasite named Angus Stone (700 m) or New Angus Stone. The volcano is located in the northeastern part Makawidey minahasa Village, District Aertembaga, Bitung.
Examination of the crater conducted in 1971 to see that G.Tangkoko and G. Two Brothers, has a very simple morphology. Both volcanoes are separated by a dike with a stance northwest southeast.
At the foot of the dike is located upstream of S. Batu Putih and S. Air Prang. G. Nini elliptical with the size of the crater ± 2 km x 1 km and a depth of ± 200m.
In the bottom of the crater there is a dome-shaped cap as high as ± 100 m guessing the plug formed in activity in 1801 (Junghuhn, 1844). On the eastern slopes as far as ± 2 km from G. Nini located lava dome Batu Angus and her flow of lava along the ± 2 km. Crater G.Batu Angus top 300 x 325 m and the center line of the crater floor ± 200 m, while the depth of ± 90 m.
During the activity history G.Tangkoko eruptions seem more prevalent in G.Batu Angus and never reported any human casualties. But even so, in the future danger of eruption should be calculated because the area around the volcano, particularly the city of Bitung, continues to grow even more rapidly.
B. How to Achieve Crater Peak
There are three roads to the summit of this mountain, namely:
1. From the port of Bitung -Kp. Pinangunian - Peak
2. From Kp. Makawidey - Kp. Loari - Peak
3. From Kp. Batu Putih - Kp. Paring - Peak
Generally, foreign experts and the nation of Indonesia as Kommerling (1923), Koperberg (1928) and Djatikusumo (1947), climb the mountain peaks of Kp. Makawidey - Kp. Loari - Puncak. Similarly Reksowirogo (1971), make the climb the peak on February 9, 1971, departing from the village Makawidey heading north a little to the east, along the coast through palm plantations. After ± 1 km away, arrived in the village lembahao. Next trip heading north a bit to the east via tegelan the cabin, toward Kp. Loari (up to ± 300 m altitude, average slope 15 ยบ). His ending up on the edge of the crater on the southeastern part of the point of elevation 670 m. The time is in need of Makawidey - the edge of the crater is ± 3 hours.
C. History Events (eruption ever):
Based on the data ever collected from various reports and publications, the volcano eruption may be summarized as follows:
1680: Koperberg (1928) and Kommerling (1923) estimated that the eruption may occur in G. Two Brothers, but Neumann van Padang (1951) considered normal in the central crater eruption which caused damage in the surrounding area.
1683: The eruption in the crater center G.Tangkoko
1694: There was an explosion but no further details.
1801: According Junghuhn (1844), Kommerling (1923) and Koperberg (1928) eruption occurred in G.Tangkoko. The eruption ejects ash, sand and rocks reddish burning. Abu spread to Airmadidi, Kema, Maumbi, even to Manado. After that arises lava plug in the bottom of the crater G.Tangkoko and G. Angus Stone. In that year the same eruption occurred between normal eruption in the central crater, eruptions and eruptions in the lake next to the activity allegedly occurred kawah.Pada lava flows in G.Batu Angus (Neumann van Padang (1951)).
1821: There was a stream of lava from G. Stone Angus.
1843 - 1845: There was an eruption of normal in G. Batu Angus
1880: There was an eruption of G. Stone Angus, accompanied by lava flows.
1952: The increase in activity in G. Tangkoko.
The rocks that the eruptions are as follows: andesite augit hipersten found at the foot G. Tangkoko. While the result of the eruption in G. Angus Stone composed of andesite pyroxene (Neumann van Padang, 1951).
D. Observations G. Nini
Feared the possibility of a catastrophic eruption G. Nini, while the settlement is growing, so in an effort to reduce all possibilities and victim built a Volcano Observation Post. With the infrastructure has been the efforts to monitor the behavior of G. tangkoko can be done continuously.
Expected later be obtained from the data to estimate the level of activity of the volcano, or can be caught early if there are symptoms of eruption will occur so that a warning can be given to residents early or on time.
The Volcano Observation Post, often called the post Volcanology, originally located ± 5 km to the west of G. Nini or ± 3 km northwest G. Two Brothers Of The post is not only to observe G. Tangkoko, but monitored G. Two Brothers , Since July 2002 it moved to the village post Winenet Aertembaga District of Bitung.
In the history of G. Nini seems both volcanic activity are inseparable. At the feet of G. Two Brothers is located Bitung City which is an important port city in North Sulawesi and is currently advancing its development by leaps and bounds. The fact that makes the degree of danger G. Nini and its neighboring volcano higher.
Observations constantly performed at this time, especially visual and seismic. Visual observation to monitor all changes or symptoms that appear on the surface while the seismic to determine the movements of magma in the body G. Nini in particular and other volcanoes nearby. Perhaps these symptoms will appear ahead of eruption. Since the start of continuous observations at the volcano, 1986, until the beginning of 1990 has not been recorded any changes or abnormalities vulkaniknya symptoms.
E. Hazard eruption G. Nini and Disaster Prone Areas
In the history of activities G. Nini big eruption ever recorded, namely in the 1801.Abunya spread to Manado. According to Neumann van Padang east, the direction of G. Stone Angus.
With the advent of G. Two sudara in southwestern G. Nini, then the area is dangerous, both because of the lava flows, hot clouds and lava limited rains up in the dike that extends northwest -tenggara which limits both mountains are sprayed into the air, spreading toward danger and very depending on the wind direction and speed at the time of the eruption occurred.
Based on the type and intensity of the danger posed by the greatness of eruption, disaster-prone areas in Tangkoko G. divided into two kinds:
1. Disaster Prone Region II
It is estimated that the disaster-prone region II, which is threatened by lava flows, hot clouds and lava rain generated by the eruption of Mount Tangkoko, is expected to cover the area with a radius of 5 km from the point of activity. But the area in the southwestern part of the semi-circle is relatively safer. Distribution of hot clouds and lava lava flow of rain is expected to vary based on the flow of the river, to the south follow S. Prang, to the north K. Batu Putih. While westward along the coast northwest of the volcano. Comprehensive Disaster Prone Region II ± 89.4 km²
2. Disaster Prone Region I
In the area of Disaster Prone I the danger caused by the spread of the eruption material is ejected into the air when the eruption showed greater intensity.
The area covers an area with a radius of 8 km from the eruption point with a variation that danger can threaten the well along the river because of the lava flows and lava rain. The area to the south covering an area along S. Copper, and north along S. Kawua. While to the west is the area along the coast. Comprehensive disaster prone areas I ± 100.5 km².
Translated from : http://eddiedandel.blogspot.co.id/2013/04/gunung-api-tangkoko.html
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