Syamsurijal, Rasimeng and Rindi Antika, Sari and Muhammad, Syirojudin and Suaidi, Ahadi (2019) Lead Time Prediction Between Magnetic Anomaly and Earthquake Occurrence Using Lombok Earthquake’s Magnetic Anomalies and Seismograph Data, West Nusa Tenggara. The 6th Annual Scientific Meeting on Disaster Research 2019 International Conference on Disaster Management, 1 (1). pp. 57-67. ISSN 978-602-5808-43-2

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Abstract

Lombok earthquake event that indicated as the major earthquake on August 5, 2018 at 21:56 WIB, with strength of 7 Mw and 10 Km depth, has a epicenter distance 30 km away to NorthEast of East Lombok. BMKG (2018) states that this earthquake occurred due to Flores Back Arc Thrusting activities, this statement concluded as a result of earthquake source mechanism movement analysis to the shifting rocks (plates) that moving up. In an effort to mitigate earthquake disaster, BMKG try to figure out the changes in the magnetic field due to plates shifting activities that cause earthquakes by installing LEMI 018 on August 28, 2018 at Bayan field. This tool is used for measuring earth's magnetic variance data to find out the cause of the earthquake in further analysis. By using magnetic anomaly data from August to October recorded by the LEMI 018 at Bayan Station, a frequency spectrum analysis and Z/H ratio polarization was carried out to determine Onset time anomalies. As a result of data processing and analyzing, show that the lead time between magnetic anomalies and earthquake events using data from the earthquake seismograph of Lombok ,West Nusa Tenggara, has a minimum leadtime occurring for 173 hours and maximum leadtime occurring for 658 hours.

Item Type: Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User: SYAMSURIJAL RASIMENG
Date Deposited: 04 Nov 2019 07:35
Last Modified: 04 Nov 2019 07:35
URI: http://repository.lppm.unila.ac.id/id/eprint/14897

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