In July 2018, Lombok Island in Indonesia shaked by earthquake of Flores Fault. The earthquake is felt in surounding Lombok like Bali. There are two major earthquake source in Lombok, they are Flores fault in the north, and subduction zone in the south. There are more than 300 fatalities of human, and more than 270.000 refugees. The government of Indonesia established that Lombok Earthquake was a national disaster. This research is aimed to describe how the subduction zone around Lombok both it come two major of earthquake source and to answer the rumor is the earthquake affect Rinjani vulcano in Lombok activity or not.

Abstrak – Manajemen bencana menjadi salah satu prosedur penting yang dikembangkan pada wilayah yang sering mengalami kejadian bencana, salah satunya adalah di Indonesia. Berbagai jenis bencana yang terjadi seperti banjir, tanah longsor, gempa bumi, tsunami, gunung api, dan bencana lainnya mengharusnya sistem manajemen kebencanaan yang dibangun harus memiliki kelengkapan data dan informasi. Salah satu jenis data dan informasi penting yang harus tersedia adalah data yang memiliki aspek lokasi, yaitu data dan informasi geospasial. Berbagai metode dilakukan untuk menyediakan data dan informasi geospasial dalam mewujudkan sistem manajemen bencana yang handal dan akurat. Beberapa metode tersebut adalah pengukuran GNSS, penginderaan jauh, fotogrametri, dan Sistem Informasi Geospasial (SIG). Metode-metode geospasial dilaksanakan di setiap tahap siklus bencana. Dengan memanfaatkan informasi geospasial maka dapat melengkapi sistem dan proses manajemen bencana dalam hal ketersediaan data yang akurat, efektif, dan terbarukan. Hal ini memudahkan proses diseminasi informasi kebencanaan, baik untk pelaporan, visualisasi kondisi, dan pengambilan kebijakan. Kata Kunci: geospasial, sig, data spasial, manajemen bencana, mitigasi Abstract – Disaster management is one of the important procedures developed in areas that frequently experience disasters, one of which is Indonesia. Various types of disasters occur such as floods, landslides, earthquakes, tsunamis, volcanoes, and other disasters. The disaster management system that is built must have complete data and information. One type of important data and information that must be available is data that has a locational aspect; namely geospatial data and information. Various methods are used to provide geospatial data and information in creating a reliable and accurate disaster management system. Some of these methods are GNSS measurements, remote sensing, photogrammetry, and Geospatial Information Systems (GIS). Geospatial methods are implemented at each stage of the disaster cycle. Utilizing geospatial information can complement disaster management systems and processes in terms of the availability of accurate, effective, and renewable data. This facilitates the dissemination process of disaster information, for reporting, visualizing conditions, and making policies.  Keywords: geospatial, gis, spatial data, disaster management, mitigation

Separation between Regional and Residual anomaly in Gravity and Magnetic data processing is very important to get the best result in geological interpretation. Several method were used to solve this problem like upward continuation and polynomial fitting. With the same principle, 2D FFT is applied by make an interactive tools based on Matlab Language Programming, named “Oasis Ala-Ala”. It adopt the algorithm from software Oasis. It started with make visualization map or the original data, then the map divide into some grids. Each of grid contain gravity or magnetic data. Then it transformed from special to wavenumber domain. After that, it convolve with our own filter matrix. And the last step is inverse it to get the regional and residual anomaly map. However, Matlab is powerful in facilitate this process in the GUI Toolbox. One important thing is the size of gravity and magnetic data. It will improve to Filter matrix size before do inverse process.

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Landslide disaster is one of the most frequent disasters in Clapar, Banjarnegara. Landslide is a recurring event and there is no suitable method to respond the threat until now, so that preventive stage have not been maximized. The scienstist explains that the movement of land in the area is very active, but the level of activity that can cause landslides can’t be known qualitatively or quantitatively. The method that used to achieving these purposes is geology and landscape morphology mapping in areas that have been and have possibility landslide disaster. Factors that controls the landslide motion are geomorphology, rock type, geological structure and land use, while the triggers are water infiltration and rock fractures. Slope in Clapar is 30 - 70% and the rock type is clay with quarzite and chert fragments from Totogan Formation, volcanic breccia from Tapak Formation, and polimictic breccia from Ligung Formation. Geological structure that found is right slip fault (Rickard, 1972) with the strike and dip of fault is N 359oE/79o. The land usage are pine forest, salak farm, and settlement. Angle of shear strength from direct shear test soil sample in Clapar slope is 27o with safety factor value is 1.045 included in the critical class. According to those existing datas, Clapar included into area that are very vulnerable to landslides. It is because this area was affected by major slip fault and steep angle. The most land usages is salak farms which is the plants has fibrous root that control the properties of soil. It makes the water easily infiltrate into the soil that causes increase the weight of the soil and make the plane become slippery.