Earthquake Swarm Analysis around Mt. Salak, West Java, Indonesia, Using BMKG Data from August 10 to November 24, 2019. Issue 1 (October 2021)

• Record Type: Journal Article
• Authors: Supendi, Pepen; Puspito, Nanang T.; Nugraha, Andri Dian; Widiyantoro, Sri; Abdullah, Chalid Idham; Daryono, ; Karnawati, Dwikorita; Rohadi, Supriyanto; Zulfakriza, ; Sahara, David P.
• Is Part Of: IOP conference series. Volume 873:Issue 1(2021)
• Publication Date: 2021-10
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/873/1/012002
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Earthquake swarms commonly come approximately active tectonic and volcanic area. Interestingly, the swarm events occurred ~23 km southwest from Mt. Salak-Bogor, West Java, Indonesia, from August 10 to November 24, 2019, and were recorded by local/regional network of the Indonesian Agency for Meteorology, Climatology, and Geophysics (BMKG). Our previous study showed that in this area a destructive ML 4.6 earthquake with thrust faulting occurred on September 8, 2012. The double-difference method was applied to update the hypocenter locations from the BMKG data. In the time period of ~3.5 months, we relocated 79 swarm events with ~9.4 km depth average for local magnitude (ML ) 2.2 to 4.2. The source mechanism result for selected events shows a strike-slip faulting. Our interpretation is that these swarm events are probably related to stress change due to volcano-tectonic activity.