The 2006 tsunami, throughout the Pangandaran to Cilacap Coast, resulted in 802 deaths and 1623 houses being destroyed. At Jetis beach, Cilacap Regency, 12 people died, and hundreds of houses were damaged. This area is a tourism destination, visited by hundreds of people per week. Therefore, this study aims to determine a tsunami hazard zone and the most effective evacuation route based on multiple factors and scenarios. The method of this study includes scoring, weighting, and overlaying the distance of the Jetis beach from the shoreline and the river, including the elevation and topography. The study results depict five levels of tsunami hazard zone at the Jetis beach: an area of high potential impact, moderately high, moderate, moderately low, and low. The southern Jetis beach is the most vulnerable area with regard to tsunamis, characterized by low elevation, proximity to the beach and rivers, and gentle slopes. The simulation results show the four fastest evacuation routes with the distance from the high-risk zone to the safe zone of around 683–1683 m. This study infers that the southern part of the Jetis beach, in the moderate to high impact zone, needs greater attention as it would suffer worst impact from a tsunami.

The destructive force of the tsunami could induce a considerable amount of casualties, infrastructures, and properties. One of the large tsunamis in Indonesia is 2006 South of Java Tsunami. There were 664 fatalities, 498 injured, 55 million dollars in losses, and 1623 homes damaged. Simulations of flow depth and run-up of the 2006 tsunami on Widarapayung Beach have never been conducted. Although they can be used as a basis for determining tsunami hazard zones. The method that might be used for tsunami impact analysis is tsunami waves modeling by considering the focal mechanism. The aims of this research are to determine the run-up height and flow depth of the 2006 tsunami on Widarapayung Beach. The calculations of modeling were performed using COMCOT numerical model. It operates calculations by solving shallow water equations in both linear and non-linear equations. Using this model, the generation and propagation of tsunami in a multi-grid system could be simulated. The result of the simulations on three different models depicts that the maximum run-up height on Widarapayung Beach is 3 to 3.8 m. The flow depth result from the three different models also suggests vulnerable areas up to 1 km from the shoreline.

<p>Metode mikroseismik merupakan suatu metode pasif seismik yang menggunakan sumber pasif bumi. Metode ini dapat digunakan untuk menganalisis potensi efek kerentanan tanah di sekitar wilayah Prambanan, Yogyakarta, Indonesia. Studi kali ini berlandaskan pada teori gempa bumi yang dapat memicu mengaktifkan bahaya lain seperti likuifaksi yang disebabkan karena tanah kehilangan kekuatan akibat kehilangan tegangan yang berasal dari pori batuan yang terisi oleh fluida. Dengan demikian, informasi tentang potensi likuifaksi diperlukan untuk mencegah kerusakan, pada hal ini terfokus pada candi Prambanan. Teknik pengukuran dan analisis mikrotremor telah berhasil untuk mengidentifikasi keberadaan kerentanan tanah dan potensinya terhadap likuifaksi dengan cara mikrozonasi di banyak tempat di seluruh dunia. Makalah ini menyajikan studi eksperimental mikrotremor untuk penyelidikan karakteristik tanah berdasarkan tiga parameter seismik pasif yaitu frekuensi dominan (f0), amplifikasi (A0), dan indeks kerentanan seismic (SVI). Dilakukan pengambilan data sebanyak 56 titik titik di sekitar candi Prambanan untuk menyelidiki sifat-sifat tanah di daerah ini. Dalam hasil penelitian ini, perlu dicatat bahwa karakteristik mikrotremor tergantung pada jenis endapan tanah dengan menghasilkan nilai amplifikasi diatas 4 dan nilai indeks SVI berada pada 20 - 100.  Dengan demikian, wilayah penelitian termasuk pada zona berbahaya potensi likuifaksi apabila terjadi gempa lokal maupun regional, terkhusus di wilayah utara dan timur, dibuktikan dengan distribusi nilai Ao dan SVI yang tinggi. Peta mikrozonasi dari hasil penelitian ini diharapkan dapat digunakan sebagai referensi untuk pembangunan dan perencanaan kota di sekitar Prambanan dan mendorong inovasi untuk mengurangi dampak kerentanan seismik dan likuifaksi di sekitar Candi Prambanan</p>

Landslide vulnerability is affected by several factors including the condition of the geology, geomorphology, soils, and land use. The purpose of this research is to examine landslide Vulnerability class by using synthetic geomorphological approach in the research area. Survey research method was use which includes field work and laboratory work. Field work intended for the mapping landslide of area, measurement and observation of the land characteristics. Laboratory work is aimed at analyzing the soil texture. The data of the field work and the laboratory are used to determine the landslide vulnerability class by using geographical information system technology. Landslide vulnerability class is analyzed by using 11 parameters. Data processing parameters of each land forms is done by giving values between the prone and not cartilage. The determination of the class prone determined how many parameters of value-prone. The results of the study show that the landslide vulnerability class research area is divided into two classes, namely medium and high vulnerability class. High vulnerability is dominating class with broad reaching 89.58% of the total area. A class of high vulnerability dominates due to various reasons including geological conditions i.e. all areas with sloping rocks of structure bedded with a slope of more than 10º, and arranged Halang and Tapak rock formations.