Penentuan lokasi hiposentrum gempa Bumi penting untuk dilakukan dengan cepat dan tepat. Hal tersebut bertujuan untuk mengetahui penyebab terjadinya gempa Bumi tersebut. Penelitian ini menggunakan input parameter hiposentrum awal, serta waktu penjalaran gelombang P. Data ini diperoleh dari BMKG Earthquakes Repository. Kejadian gempa Bumi yang digunakan adalah kejadian gempa Bumi pada 9 Februari 2017 dengan magnitudo gempa Bumi (MLv) 4,6 dan 4,2 pada kedalaman 10 km. Posisi stasiun pencatat gempa juga digunakan dalam proses perhitungan. Data tersebut diinversi untuk mendapatkan posisi hiposentrum baru sebagai hasil dari perhitungannya. Selain itu, hasil dari perhitungan ini adalah lama pemrosesan yang akan dianalisis dalam penelitian ini. Hasil yang didapatkan dalam penelitian ini yaitu metode grid search membutuhkan waktu yang lebih lama dalam pemrosesan data dibandingkan metode Geiger karena iterasi Geiger cepat mendapatkan hasil optimum.

This study aims to design and develop an application that can analyzegovernmentpolicies systematically online. February 2021 Microsoft make survey which states that Indonesia is an uncivilized country in position 29 of 32 countries in Southeast Asia in social media, including in criticizing government policies. Since the end of 2019 there has been a pandemic Covid-19, which causes limitations on community mobility in providing aspirations and analyzing government policies. The legal basis that we use is Law Number 30 of 2014 concerning Government Administration, Article 1 paragraph 2 of the 1945 Constitution. The research we carried out was through a field observation process, namely conducting research on the urgency of the formation of applications, then designing applications and developing applications. Government policy analysis. The subjects of our research are students in the Special Region of Yogyakarta who have PPKn study programs, researchers who collect data through the literacy study process and questionnaires or questionnaires that we give to research subjects. We found the fact that analyzing a policy is still done manually. The result of this research is to make an analysis application of a government policy. This application can be useful for the community and government agencies in making government policies.

Puppet as a traditional cultural heritage of the Indonesian nation, the existence of wayang until now still exists in the community, including the generation of high school students (SHS). There are many life lessons that can be learned from wayang culture, especially character or moral lessons that can be taken for social life from wayang culture. High school students are currently experiencing a change in character, especially in hedonistic behavior. The rise of hedonism among high school students. This study aims to prevent hedonism by using the Puppet Culture Character Education book. This research uses research method R&D. Data collection techniques used questionnaires and literacy studies, with the research subjects being high school students in Prambanan District, Klaten Regency. The questionnaire was distributed online through the WhatsApp platform, while the questionnaire was in the form of a google form. Data analysis techniques using quantitative and qualitative techniques. With this Puppet Culture Education book, the problem of hedonistic behavior among students will be overcome.

Southern Sumatra and its surroundings are close to the contact zone of the Indo-Australian plate and Eurasian plate, so the area always relates to the high seismicity zone. The Sumatran subduction zone, the Mentawai fault, and several segments of the Sumatran fault drive seismic activities in the area. Tectonic settings are essential to understanding the area's source and hazard. This understanding can be obtained using the relocated hypocenter distribution and the 3D velocity model in the area. Relocated hypocenters and velocity models are obtained from simultaneous inversion from the BMKG earthquake catalog in January 2012-December 2020 using the double difference seismic tomography method. Seismic velocity inversion of P- and S- wave tomograms image the thermal zone beneath Dempo and Patah volcanoes at a depth of 30-50 km. Slab dehydration is also observed in several forearc high zone. Both phenomena are associated with negative anomalies. The Sumatran and Mentawai fault zones are marked between negative and positive anomalies on the contact zone. The subducted slab of the Indo-Australian plate is observed until a depth of 150 km, which is the maximum depth of nodes used in this study. The granitic basement beneath Anak Krakatau volcano is detected until 10 km. Two of those geological features are related to positive anomalies.