The doi above is for this specific version of this dataset, which is currently the latest. Newer versions may be published in the future. For a link that will always point to the latest version, please use
doi: 10.4121/21310383

Nijholt, Nicolai; Simons, Wim; Riva, Riccardo; Efendi, Joni; Sarsito, Dina et. al. (2024): Supporting dataset for the article: Triggered and recurrent slow slip in North Sulawesi, Indonesia. Version 1. 4TU.ResearchData. dataset. https://doi.org/10.4121/21310383.v1

Dataset

• Geophysics
• Earth Sciences

GNSS, Indonesia, SE Asia, Slow Slip Event, Subduction (geophysics), Sulawesi, Time Series, Transient Surface Motion

CC BY-NC-SA 4.0

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by Nicolai Nijholt , Wim Simons , Riccardo Riva , Joni Efendi , Dina Sarsito , Taco Broerse

  

Abstract

Nearby faults interact with each other through the exchange of stress. However, the extent of fault interaction is poorly understood. In particular, interactions may lead to slow-slip activity, resulting in episodes of transient surface motion. Our study concentrates on Northwest Sulawesi (Indonesia), which hosts two fault zones with potential for major earthquakes and tsunamis: the strike-slip Palu-Koro fault and the Minahassa subduction zone. Thanks to a 20-year-long effort in geodetic monitoring, we are able to identify multiple periods during which surface velocities deviate from their interseismic trend. We use a Bayesian methodology with forward predictions of slip on the two fault interfaces to match the observations following the 2018 Palu earthquake, and infer that both deep afterslip on the Palu-Koro fault and slow slip on the Minahassa subduction interface have caused the observed transient surface motion. This finding represents the first recording of a slow slip event on the Minahassa subduction interface. We also infer that the subduction interface and the strike-slip fault are likely interacting on a regular basis.

Data

Least squares parameterization of GPS data contains the station positions, jumps, transients and velocities shown in figure 2A and S1-13 in .txt format.

RINEX GPS data contains RINEX files of the campaign stations after the 2018 Palu earthquake

Model data contains model output files used to create the figures 4,6,7, S12-17 in .txt format and two supporting images in .png format.

• 2024-07-08 first online, published, posted

4TU.ResearchData

Triggered and recurrent slow slip in North Sulawesi, Indonesia

• Regions of HIgh SeismiC Hazard: IdentfcatIon of Fault Deformation Transients in the Neotectonic Framework of Central and North Sulawesi, Indonesia (RISC2IDNSI) (grant code ALWGO.2019.045) [more info...] Dutch Research Council

TU Delft, Faculty of Aerospace Engineering, Department of Space Engineering