Among the number of active volcanes of Jawa this is the lowest and smallest in dimension. Seen from the western shore of the lake (ranu) Lamongan or Glagah, his right summit, which his a cone-shaped form is visible under a view angle of 9'54', and his sharp angular left summit under an angle of 7' 22' above the horizon.
With regard to the earliest times to histories report have received. From the fluent as well an from the positions of both canes follows, that the Malkan or consent said, the mount.
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.
During 1922 the G. Lamongan was often visited by the volcano guideship survey namely in April, June and August.
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 …
In accordance with Lorie and Prof. Behrens we have determined all collected samples as real basalts. The microscopic praeparates only show difference in relative number and size of the separated crystalls between them, and with respect to the groundmass, also in his capacity of the groundmass itself. As conson with basalt, the olivine exclusively appears as porphyric separation and not in the g…
In February of the former year (1898) a very remarkable outburst on the slope of the volcano Lamongan (in the residence Probolinggo on Jawa) had taken place, which by several persons, among others by the Controler of Klakah, A. Ardesch, and the Assisntant-Resident of Lumajang, C.Lok, was observed.
In the Old Javanese poon Niagarakretagana', a panegyric or landatory poon on H.IM. Radjasanagara (Hayan Voeroek) of Majapahit, the post laureate Prapanjtjia in song I strophe 6 sang of a volcanic outburst, which had taken place in 1334 AD before the birth of this fanous emperor fron Majapahit's prosperity, which outburst according the poet was the proof that the little prince, which is to be bo…