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ANALISIS DISTRIBUSI KERUSAKAN AKIBAT GEMPABUMI 27 MEI 2006 MELALUI PENDEKATAN KEGUNUNGAPIAN DI DAERAH WONOLELO DAN SEKITARNYA, KABUPATEN BANTUL, DAERAH ISTIMEWA YOGYAKARTA Mulyaningsih, Sri; Husadani, Y T; Devi, L R; Irawan, S N
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 2 Februari 2009
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1147.179 KB) | DOI: 10.34151/technoscientia.v1i2.405

Abstract

Northern Wonolelo area till Berbah was the areas with the most damaged generated by an earthquake of 27 May 2006. On the other hand, volcanic rocks within circular features characterize the areas. Palaeovolcanism had intensively deformed their lithology, generated normal faults and shear joints, in radial pattern with the axis of the vent. The earthquake force reactivated the existing faults and shears. Area with past central eruptions easier to deformed than the others. Volcanic-stratigraphy analyses found three periods of explosively volcanisms intersecting with composite volcanisms, created three escarpments separating each others. There fore, there were three zones of the most damaged areas according to the distributions of central eruptions; i.e Wonolelo and it vicinities, Sudimoro (Segoroyoso) and its vicinities, and Watuadeg-Senthong and its vicinities. Further subsurface research is necessary to verify the central of old volcano that caused the damages.
AKTIVITAS VULKANISME EKSPLOSIF PENGHASIL FORMASI SEMILIR BAGIAN BAWAH DI DAERAH JETIS IMOGIRI Mulyaningsih, Sri; Husadani, Y T; Umboro, P A; Sanjoto, Siwi; Purnamawati, Dwi Indah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2186.868 KB) | DOI: 10.34151/technoscientia.v4i1.489

Abstract

The widely exposed of volcanic rocks within western part of Central Java-DIY Southern Mountain areas, indicates that volcanic activities had influenced geology of this area. Volcanic-stratigraphic study finds pumiceus rocks, tuff and co-ignimbrite breccias that can be described as primery volcanic rocks at study areas. Those volcanic rocks were erupted explosively followed by collapsing strato cone and forming new caldera. The associate of volcanic rocks with co-ignimbrite breccias, indicates that the central eruption was not far from the outcropes. Shallow intrusive rocks of andecites bearing hornblendes that exposed at the highest cone shape geomorphology of Gunung Gede, south to southwest Sudimoro, might be as the central eruptions.