The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR
The Purpri Fault, a newly identified active fault in East Kolaka, Indonesia, has been analyzed using an integrated geophysical approach, combining HypoDD earthquake relocation and DInSAR ground deformation analysis. The relocation of 233 seismic events from January 24 to February 7, 2025, revealed a...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Faculty of Mining and Geology, Belgrade
2025-01-01
|
| Series: | Geološki Anali Balkanskoga Poluostrva |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/0350-0608/2025/0350-06082500005P.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849728807388315648 |
|---|---|
| author | Purba Joshua Priadi Ramadhan Frando Muhammad Pertiwi Imanuela Indah |
| author_facet | Purba Joshua Priadi Ramadhan Frando Muhammad Pertiwi Imanuela Indah |
| author_sort | Purba Joshua |
| collection | DOAJ |
| description | The Purpri Fault, a newly identified active fault in East Kolaka, Indonesia, has been analyzed using an integrated geophysical approach, combining HypoDD earthquake relocation and DInSAR ground deformation analysis. The relocation of 233 seismic events from January 24 to February 7, 2025, revealed a fault structure distinct from the Middle Kolaka and North Kolaka Faults, characterized by an oblique‐normal faulting mechanism with a left‐lateral component. The focal mechanism solution confirms significant vertical displacement, indicating a fault that accommodates both extensional and shear deformation. DInSAR analysis using Sentinel‐1A SAR imagery detected subsidence and uplift patterns that align with the relocated seismicity, confirming ongoing crustal deformation along the Purpri Fault. The western block of the fault exhibits a subsidence of approximately –13 cm, while the eastern block shows uplift of +11 cm, consistent with the seismic activity. The integration of seismic relocation and deformation mapping interpretation confirms that the Purpri Fault is an independent and active fault system. The shallow depth of seismicity (<10 km) and evidence of ongoing deformation indicate a potential seismic hazard that is not currently accounted for in regional seismic hazard models. Given its capacity to generate moderate to strong earthquakes, incorporating the Purpri Fault into updated seismic risk assessments is essential for improving earthquake preparedness and hazard mitigation strategies in East Kolaka. |
| format | Article |
| id | doaj-art-e761043c9ee64bac9008fbca42a0502e |
| institution | DOAJ |
| issn | 0350-0608 2406-0747 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Faculty of Mining and Geology, Belgrade |
| record_format | Article |
| series | Geološki Anali Balkanskoga Poluostrva |
| spelling | doaj-art-e761043c9ee64bac9008fbca42a0502e2025-08-20T03:09:25ZengFaculty of Mining and Geology, BelgradeGeološki Anali Balkanskoga Poluostrva0350-06082406-07472025-01-0186112114310.2298/GABP250417005P0350-06082500005PThe Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSARPurba Joshua0https://orcid.org/0009-0006-7959-8288Priadi Ramadhan1https://orcid.org/0009-0009-5687-566XFrando Muhammad2https://orcid.org/0009-0004-5682-3986Pertiwi Imanuela Indah3https://orcid.org/0000-0001-8033-5983Gowa Geophysical Station, Agency for Meteorology Climatology and Geophysics (BMKG), Gowa, IndonesiaGowa Geophysical Station, Agency for Meteorology Climatology and Geophysics (BMKG), Gowa, IndonesiaBandung Geophysical Station, Agency for Meteorology Climatology and Geophysics (BMKG), Bandung, IndonesiaKendari Geophysical Station, Agency for Meteorology Climatology and Geophysics (BMKG), Kendari, IndonesiaThe Purpri Fault, a newly identified active fault in East Kolaka, Indonesia, has been analyzed using an integrated geophysical approach, combining HypoDD earthquake relocation and DInSAR ground deformation analysis. The relocation of 233 seismic events from January 24 to February 7, 2025, revealed a fault structure distinct from the Middle Kolaka and North Kolaka Faults, characterized by an oblique‐normal faulting mechanism with a left‐lateral component. The focal mechanism solution confirms significant vertical displacement, indicating a fault that accommodates both extensional and shear deformation. DInSAR analysis using Sentinel‐1A SAR imagery detected subsidence and uplift patterns that align with the relocated seismicity, confirming ongoing crustal deformation along the Purpri Fault. The western block of the fault exhibits a subsidence of approximately –13 cm, while the eastern block shows uplift of +11 cm, consistent with the seismic activity. The integration of seismic relocation and deformation mapping interpretation confirms that the Purpri Fault is an independent and active fault system. The shallow depth of seismicity (<10 km) and evidence of ongoing deformation indicate a potential seismic hazard that is not currently accounted for in regional seismic hazard models. Given its capacity to generate moderate to strong earthquakes, incorporating the Purpri Fault into updated seismic risk assessments is essential for improving earthquake preparedness and hazard mitigation strategies in East Kolaka.https://doiserbia.nb.rs/img/doi/0350-0608/2025/0350-06082500005P.pdfpurpri faulthypoddinsareast kolaka |
| spellingShingle | Purba Joshua Priadi Ramadhan Frando Muhammad Pertiwi Imanuela Indah The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR Geološki Anali Balkanskoga Poluostrva purpri fault hypodd insar east kolaka |
| title | The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR |
| title_full | The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR |
| title_fullStr | The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR |
| title_full_unstemmed | The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR |
| title_short | The Purpri Fault: A newly identified active fault in East Kolaka, Indonesia, based on HypoDD and DInSAR |
| title_sort | purpri fault a newly identified active fault in east kolaka indonesia based on hypodd and dinsar |
| topic | purpri fault hypodd insar east kolaka |
| url | https://doiserbia.nb.rs/img/doi/0350-0608/2025/0350-06082500005P.pdf |
| work_keys_str_mv | AT purbajoshua thepurprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT priadiramadhan thepurprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT frandomuhammad thepurprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT pertiwiimanuelaindah thepurprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT purbajoshua purprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT priadiramadhan purprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT frandomuhammad purprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar AT pertiwiimanuelaindah purprifaultanewlyidentifiedactivefaultineastkolakaindonesiabasedonhypoddanddinsar |