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

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

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020741 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020741_2
Genre: Conference Paper

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 Creators:
Sianipar, Dimas Salomo Januarianto1, Author
Daniarsyad, Gatut1, Author
Daryono, Daryono1, Author
Serhalawan, Yopi1, Author
Riama, Nelly Florida1, Author
Adi, Suko Prayitno1, Author
Karnawati, Dwikorita1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 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.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-3804
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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