Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia
Abstract Recent borehole seismic deployments conducted along the Baribis Fault in northwestern Java reveal that it may be active. In this study, we exploit these data to locate proximal earthquakes using a relative relocation technique, estimate their moment magnitudes using a spectral fitting metho...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-06-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-13896-6 |
| _version_ | 1811343493897912320 |
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| author | S. Widiyantoro P. Supendi A. Ardianto A. W. Baskara C. A. Bacon R. Damanik N. Rawlinson E. Gunawan D. P. Sahara Z. Zulfakriza Y. M. Husni A. Lesmana |
| author_facet | S. Widiyantoro P. Supendi A. Ardianto A. W. Baskara C. A. Bacon R. Damanik N. Rawlinson E. Gunawan D. P. Sahara Z. Zulfakriza Y. M. Husni A. Lesmana |
| author_sort | S. Widiyantoro |
| collection | DOAJ |
| description | Abstract Recent borehole seismic deployments conducted along the Baribis Fault in northwestern Java reveal that it may be active. In this study, we exploit these data to locate proximal earthquakes using a relative relocation technique, estimate their moment magnitudes using a spectral fitting method and compute their focal mechanisms via waveform inversion. We observe that seismicity in the eastern part of the fault is significantly higher than in the west, where a previous GPS study of the region south of Jakarta demonstrated the existence of high compression rates. These observations imply that the western Baribis Fault is locked, and that neighbouring areas, including southern Jakarta and its surroundings, may be highly vulnerable to future sizeable earthquakes when accumulated elastic strain energy is eventually released during fault rupture. Significantly, the current generation of Indonesia’s national hazard maps have not considered seismicity along the Baribis Fault. Our new results therefore call for an urgent reappraisal of the seismic hazard in northwestern Java that carefully takes into account the Baribis Fault and its earthquake potential, particularly in light of its proximity to Jakarta, a megacity that lies at the heart of one of the most densely populated islands in the world. |
| first_indexed | 2024-04-13T19:30:07Z |
| format | Article |
| id | doaj.art-8eab0fbb1de24a67820e27fc33a29993 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T19:30:07Z |
| publishDate | 2022-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-8eab0fbb1de24a67820e27fc33a299932022-12-22T02:33:13ZengNature PortfolioScientific Reports2045-23222022-06-0112111010.1038/s41598-022-13896-6Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, IndonesiaS. Widiyantoro0P. Supendi1A. Ardianto2A. W. Baskara3C. A. Bacon4R. Damanik5N. Rawlinson6E. Gunawan7D. P. Sahara8Z. Zulfakriza9Y. M. Husni10A. Lesmana11Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungAgency for Meteorology, Climatology, and Geophysics (BMKG)Geophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungGeophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungDepartment of Earth Sciences, Bullard Labs, University of CambridgeGeophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungDepartment of Earth Sciences, Bullard Labs, University of CambridgeGlobal Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungGlobal Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungGlobal Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungGeophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungGeophysical Engineering Study Program, Faculty of Mining and Petroleum Engineering, Institut Teknologi BandungAbstract Recent borehole seismic deployments conducted along the Baribis Fault in northwestern Java reveal that it may be active. In this study, we exploit these data to locate proximal earthquakes using a relative relocation technique, estimate their moment magnitudes using a spectral fitting method and compute their focal mechanisms via waveform inversion. We observe that seismicity in the eastern part of the fault is significantly higher than in the west, where a previous GPS study of the region south of Jakarta demonstrated the existence of high compression rates. These observations imply that the western Baribis Fault is locked, and that neighbouring areas, including southern Jakarta and its surroundings, may be highly vulnerable to future sizeable earthquakes when accumulated elastic strain energy is eventually released during fault rupture. Significantly, the current generation of Indonesia’s national hazard maps have not considered seismicity along the Baribis Fault. Our new results therefore call for an urgent reappraisal of the seismic hazard in northwestern Java that carefully takes into account the Baribis Fault and its earthquake potential, particularly in light of its proximity to Jakarta, a megacity that lies at the heart of one of the most densely populated islands in the world.https://doi.org/10.1038/s41598-022-13896-6 |
| spellingShingle | S. Widiyantoro P. Supendi A. Ardianto A. W. Baskara C. A. Bacon R. Damanik N. Rawlinson E. Gunawan D. P. Sahara Z. Zulfakriza Y. M. Husni A. Lesmana Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia Scientific Reports |
| title | Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia |
| title_full | Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia |
| title_fullStr | Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia |
| title_full_unstemmed | Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia |
| title_short | Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia |
| title_sort | implications for fault locking south of jakarta from an investigation of seismic activity along the baribis fault northwestern java indonesia |
| url | https://doi.org/10.1038/s41598-022-13896-6 |
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