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Journal : Jurnal Penelitian Pendidikan IPA (JPPIPA)

Study of Seismicity Based on the Results of Hypocenter Relocation Using Double Difference (HypoDD) Method in West Sumatera and Its Surrounding Syafriani; Furqon Dawam Raharjo; Suaidi Ahadi; Mohamad Ramdhan
Jurnal Penelitian Pendidikan IPA Vol 9 No 7 (2023): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i7.3792

Abstract

The presence of the Indo-Australian plate, the Eurasian plate and the active Sumatra fault zone makes the West Sumatra region and its surroundings have very high seismic activity. To describe the seismicity pattern, it is necessary to analyze the earthquake hypocenter relocation, one of which is using the double difference (hypoDD) method. This method basically uses the data residual travel time from each hypocenter pair to the earthquake seismic station. The purpose of this research is to analyze the relocation of the hypocenter and describe the seismicity pattern in the West Sumatra and surrounding areas. The data used in this study are the time arrivals of P and S waves during the period of  2022 obtained from the earthquake catalog at the Padang Panjang Geophysical Station. The results showed that the earthquake hypocenter was relocated 888 out of 934 earthquake events and the distribution of hypocenter relocation produces a good seismicity pattern. From the results of the earthquake hypocenter relocation, the seismicity pattern in the West Sumatra region and its surroundings is generally influenced by subduction zones and some due to active fault zones. Seismicity in the subduction zone and active faults of Sumatra has a depth of about 50 - 250 km and 5 - 20 km. This indicates that during the period of 2022, subduction zones with medium to deep depths are very active as well as in Sumatra's active fault zones, especially  in the Sianok segment.
Validation of the Physics E-Module Based on Problem Based Learning as Independent Teaching Material to Improve Critical Thinking Skills of Class XI High School Students Riza Azriyanti; Syafriani
Jurnal Penelitian Pendidikan IPA Vol 9 No 11 (2023): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i11.5809

Abstract

Students' critical thinking skills are very useful and useful as preparations for facing current and future life, but the reality in the field is that students' critical thinking skills are still low. So one solution is to develop e-modules based on problem based learning. This research aims to determine the level of validity of problem based learning-based e-modules as independent teaching materials to improve the critical thinking skills of class XI high school students. The development model used is ADDIE. The instrument used in this research was a validation questionnaire by 3 validators. The data analysis technique used is the Aiken'V formula. The e-module validation results obtained an average of 0.93 with a valid category. So it can be concluded that the physics e-module based on problem based learning to improve students' critical thinking skills is valid and suitable for use in learning at school.