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PALEOMORFOGENESIS BENTANG ALAM KOMPLEKS GUNUNG IJO, KULONPROGO Rr. Amara Nugrahini; Hill Gendoet Hartono; T. Listyani R.A.
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1831

Abstract

Geomorphological studies of the Mt. Ijo complex area need to be done to understand the geomorphology of the past. The purpose of the study was to identify geomorphological characteristics in order to gain an understanding of Mt. Ijo's paleomorphogenesis. The research was conducted using geomorphological observation methods in the field and assisted by rock petrographic analysis. Mt. Ijo is an old volcano that forms the West Progo Hills. The Mt. Ijo complex is composed of a predominance of igneous and volcanic rocks in the form of coherent lava and pyroclastic, in addition to sedimentary rocks in the form of limestone. The Mt. Ijo complex forms the remains of an ancient volcano. The remaining morphology is interpreted as part of the ancient volcanic body in the central and proximal facies.Keywords: Mt. Ijo, paleomorphogenesis, volcanic facies, remaining landform
Analisis Respon Hidrogeologi terhadap Stress Saat Terjadi Gempabumi (Studi Kasus Semburan Lumpur Setelah Gempa Tasikmalaya 2009 dan Pidie Jaya 2016) J. Sinipar, Dimas Salomo; Erwin Wijaya, Andy; T. Listyani R.A.
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Tectonic earthquakes often cause hydrogeological responses such as mudflows, but the mechanism by which stress during an earthquake triggers such responses is still unclear. The 2009 Tasikmalaya earthquake (M7.0), for example, triggered a mudflow in Pasirgede Village, Sukahening District, Tasikmalaya Regency, West Java. Another example is the 2016 Pidie Jaya, Aceh earthquake (M 6.5), which also triggered a mudflow in Meunasah Balek Village, Meureudu District, Pidie Jaya Regency, and in Benih Tamiang Village, Rantau District, Aceh Tamiang Regency. In this study, an investigation was conducted on volumetric strain, normal stress, and dynamic stress changes from tectonic earthquakes at the site location experiencing hydrogeological responses. The results show that the hydrogeological response is more caused by dynamic stress changes by seismic waves generated by the tectonic earthquake. This study is useful for understanding the hydrogeological response to stress that occurs during earthquakes, especially in relation to mitigating disaster events..