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High slip rate for a low seismicity along the Palu-Koro active fault in central Sulawesi (Indonesia).
- Source :
- Terra Nova; Nov2001, Vol. 13 Issue 6, p463-470, 8p
- Publication Year :
- 2001
-
Abstract
- In eastern Indonesia, the Central Sulawesi fault system consists of complex left-lateral strike-slip fault zones located within the triple junction area between the Pacific, Indo-Australian and Eurasian plates. Seismicity in Central Sulawesi documents low-magnitude shallow earthquakes related, from NW to SE, to the NNW-trending Palu-Koro (PKF) and WNW-trending Matano fault zones. Study of the active fault traces indicates a northward growing complexity in the PKF segmentation. Left-lateral displacement of 370 ± 10 m of streams incised within fans, whose deposition has been dated at 11 000 ± 2300 years, yields a calculated PKF horizontal slip rate of 35 ± 8 mm yr<superscript>-1</superscript> . This geologically determined long-term slip rate agrees with the far-field strike-slip rate of 32–45 mm yr<superscript>-1</superscript> previously proposed from GPS measurements and confirms that the PKF is a fast slipping fault with a relatively low level of seismicity. [ABSTRACT FROM AUTHOR]
- Subjects :
- PALEOSEISMOLOGY
GEOLOGIC faults
Subjects
Details
- Language :
- English
- ISSN :
- 09544879
- Volume :
- 13
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Terra Nova
- Publication Type :
- Academic Journal
- Accession number :
- 8505271
- Full Text :
- https://doi.org/10.1046/j.1365-3121.2001.00382.x