Banjir lahar di daerah G. Sermora pada tanggal 20 September 1978 terjadi akibat turun hujan torus nemoras solana 4 (empat) hari, so-Jak tanggal 19 September 1978. Kejadian tersebut dimuat dalam surat Kabar SIHAR HARAPAN pada tanggal 27 September dan Harian KOMPAS pa da tanggal 28 September 1978, bahwa Besuksat-K. Hujur dan K. Láp-rak dilalui oleh banjir tersebut.
Pengukuran kubah lava ini bertujuan untuk mengetahui volum pen-dekatan. Penulis memberi istilah volum pendekatan disini, karena berdasarkan atas sifat pengukuran pengukurannya, antara lain s a. pengukuran puncak kubah lava baru dengan cara aanpeilingen" jarak jauh dari dua titik totap (titik pengamatan) G. Sasur dan Sumberbulus (PANDI. K., 1977). b. disesuaikan dengan seket dari potret ba…
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…
The crater of the Lamongan vas visited for the last time in July 1925. Although since that tine no reports on abnornal phenomena were received, the crater was again reconnoitred at the beginning of February 1924, as we must be always on our alert, that the rostful situation of these previously so active volcano suddenly might change.
Volcanic quakes occurred since September 20,1924. E and Ne of Ranu Klakah treasures were formed. The tromometers Klakah repetend in October 135, in September 81, in December 105 shocks.
During 1922 the G. Lamongan was often visited by the volcano guideship survey namely in April, June and August.
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.
Except by the already quite quickly after-supply of water in the crater established calving off of the craterwall, the topography of the crater and therefore the correctness of the calculation of the supplied water was much more seriously hindered by a small eruption in the craterlake, which took place in the night of December6 to 7, 1928 (The big eruption lasted May 1920, 1919. Translater).