A decade of Indonesia seismicity and its seismotectonic implications: 
Evaluations from BMKG nationwide earthquake monitoring (2010-2022)

Sianipar, Dimas Salomo Januarianto; Daniarsyad, Gatut; Daryono, Daryono; Serhalawan, Yopi; Riama, Nelly Florida; Adi, Suko Prayitno; Karnawati, Dwikorita

doi:10.57757/IUGG23-3804

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A decade of Indonesia seismicity and its seismotectonic implications: Evaluations from BMKG nationwide earthquake monitoring (2010-2022)

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Sianipar, Dimas Salomo Januarianto
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Daniarsyad, Gatut
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Daryono, Daryono
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Serhalawan, Yopi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Riama, Nelly Florida
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Adi, Suko Prayitno
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Karnawati, Dwikorita
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Sianipar, D. S. J., Daniarsyad, G., Daryono, D., Serhalawan, Y., Riama, N. F., Adi, S. P., Karnawati, D. (2023): A decade of Indonesia seismicity and its seismotectonic implications: Evaluations from BMKG nationwide earthquake monitoring (2010-2022), XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3804

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020741

Abstract

Indonesia is a seismically active region with a complex tectonic setting. To monitor earthquakes in the Indonesia region, the Indonesian Agency BMKG (Badan Meteorologi, Klimatologi, dan Geofisika) has been operating a nationwide monitoring system using the permanent digital seismometer network of Indonesia (network code IA). However, the earthquake catalog/bulletin resulting from this nationwide monitoring has not yet been evaluated and discussed. In this study, we assessed a decade of seismic activity in Indonesia with a focus on earthquakes from 2010 to 2020 (11 years) and 2021-2022 (two years after significant improvement of the network). We analyzed their parameters, mainly the magnitudes, and compared them with their various magnitude types and moment magnitude by the Global Centroid-Moment-Tensor (GCMT) catalog. A unified earthquake catalog with homogeneous (local) magnitudes is obtained. We evaluated 77,987 earthquakes during this period with the data complete at the local magnitude of 3.5 based on the analysis of their frequency-magnitude distribution (FMD). We then computed seismicity rates of M>3.5 for different regions and tectonic regimes in Indonesia. We also discuss the seismicity 2021-2022 after the significant increase of seismic stations in the IA network. Finally, we discussed seismicity evolution and its seismotectonic implications. Our study is necessary for further seismic hazard assessment in Indonesia.