Ten einde een juiste beeld te krijgen van werkingvan den Semerce is de onderstaande, lijst en grafiek (Plaat ) samengesteld uit de geschriften welke ter be-schikking staan. Daaruit blijkt niet, dat de vulkaan voort-durend gewekt heeft, wel echter dat hij herhaaldelijk uitbars-tingen heeft vertoond. Zeer zeker is de lijst onvolledig en de eruptieve werking telkens van langer duur geweest, dan hi…
Van Jarongan uit loopt eer breed paardonepad war do Me. To marasowoe. Volgen wij dat pad en stokon wo hos ravijn (wontolij van Kp. Tjomarasowoe) over, dan komen wij direct na ravijn op een boschpad uit, dat ook djalan ka Kawah" genoond wordt. Large dit pad kunnon wij de Kawah bereiken.
After the December eruption 1930, the laducourses of Merapi Volcano, Central Java previously showed no water circulation, expect at big rainfall, which caused shorthliving banjirs.
As mentioned, during the observation, extensive temperature observations were carried out. From this on the first place appeared, that within the crater groups of solfatara's and hot springs can be distinguished, which temperature strongly varied. The distribution of the temperatures is for a fixed day (September 2, 1924) given on Plate II. We see from this, that the highest temperature occurre…
of much more importance of the surrounding plains of the Senera is tow aquatic transportaton of the ejected products, the was danger. When we travel the area between Lunajang and Pasirian and the S foot of the volcano till the Kali Glidik, then it becomes clear to anybody which role the aquatic transportation of the Semeru products fulfils in the economic life of the here established populat…
The summit of G. Merapi is formed by a lava-plug; a cratershaped decline, such as the most volcanoes possess, is not present. However it is known,-thanks to the many interest, with which the G. Herapi in the pant century obtained, that the volcano in another stage of eruptive activity certainly owed such a cratershaped decline.
Phenomena which would indicate on an increased activity on the Kelut were not observed during 1924 and in the beginning of 1925. A fow light earthshocks, which were felt in the lowercamp, appeared to be of tectonic origin.
Although several times from the surroundings of the Lamongan nevs arrived on eruptions of the volcano, after further investigation appeared, that the observed abnormal phonomena are not to be ascribed to volcanic activity.
Of more importance than the flank eruptions are the excentric eruptions, which are fed from a much more deeper lavaniveau than the first mentioned, whereas the breakthrough mostly takes place in the area of the volcano foot. Also excentric eruptions may entirely independently become active fron the main crater, which at flankeruptions is not likely possible. Also the phenomena, with which excen…
At the end of February 1920 by the Sectionhead of the Irrigation at Lumajang was reported, that in that month an abnormal drop of the waterlevel of the Ranu's Klakah and Pakis had taken place. If the Ranu Klakah in normal times always flowed through his nator al outlet, at present it is not like this, as the lake level has drop till 1.5 m below the outlet This even happens during the full W …