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Quantifying local stability and noise levels from time series in the US Western Interconnection blackout on 10th August 1996

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  • Martin Heßler

    (University of Münster
    University of Münster)

  • Oliver Kamps

    (University of Münster)

Abstract

Critical transitions necessitate anticipation to prevent adverse outcomes. While many studies focus on bifurcation-induced tipping, noise-induced tipping is also possible. We propose to use the open-source (non-Markovian) Bayesian Langevin estimation to quantify deterministic and stochastic dynamics simultaneously. By analysing bus voltage frequency time series from the Western Interconnection blackout on 10th August 1996, complemented by conceptual network models of its key events, we reveal the interplay of changing local restoring rates and noise levels. Furthermore, a comparison of these findings to the blackout’s timeline supports our frequency Langevin model driven by correlated noise. A state change is indicated two minutes before the official triggering event, potentially by establishing a tree-to-line fault. This study highlights the importance of distinguishing destabilising factors for anticipating critical transitions and provides a tool for understanding such events across various disciplines.

Suggested Citation

  • Martin Heßler & Oliver Kamps, 2025. "Quantifying local stability and noise levels from time series in the US Western Interconnection blackout on 10th August 1996," Nature Communications, Nature, vol. 16(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60877-0
    DOI: 10.1038/s41467-025-60877-0
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    References listed on IDEAS

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