English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Conference Paper

Identification of Cianjur active fault using magnetotelluric method

Authors

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

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

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

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

Rohadi,  Supriyanto
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;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Widyadharma, P. H., Rahman, A., Yuliatmoko, R. S., Kurniawan, T., Rohadi, S., Adi, S. P., Karnawati, D. (2023): Identification of Cianjur active fault using magnetotelluric method, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3867


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020678
Abstract
An in-land earthquake of magnitude 5.6 struck Cianjur, West Java, Indonesia on November 21, 2022, at 13.21 local time causing severe damage with at least 602 deaths and the destruction of 58.000 houses. The mainshocks–aftershocks analysis suggests that the earthquake resulted from an unmapped fault with a debatable strike orientation. To investigate the subsurface structure of the affected region, we conduct a magnetotelluric (MT) survey, which has been shown to effectively image the faults at the deep subsurface level. In this study, four magnetotelluric stations were installed along a 3 km line profile through the earthquake epicenter with an acquisition time of approximately 20 hours. The MT soundings 2-D modeling inversion results show the resistivity contrast along the profile, revealing the low-resistivity zone interpreted as the existence of an unmapped fault with a depth of up to 10 km that is most probably correlated with the earthquake’s hypocenter location. Our findings also provide valuable insights into identifying weak zone in the region for further analysis and seismic hazard assessment.