The Predictable Chaos of Slow Earthquakes

Adriano Gualandi, Jean-Philippe Avouac, S Michel, D Faranda

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
32 Downloads (Pure)


Slow earthquakes, like regular earthquakes, result from unstable frictional slip. They produce little slip and can therefore repeat frequently. We assess their predictability using the slip history of the Cascadia subduction between 2007 and 2017, during which slow earthquakes have repeatedly ruptured multiple segments. We characterize the system dynamics using embedding theory and extreme value theory. The analysis reveals a low-dimensional (<5) nonlinear chaotic system rather than a stochastic system. We calculate properties of the underlying attractor like its correlation and instantaneous dimension, instantaneous persistence, and metric entropy. We infer that the system has a predictability horizon of the order of days weeks. For the better resolved segments, the onset of large slip events can be correctly forecasted by high values of the instantaneous dimension. Longer-term deterministic prediction seems intrinsically impossible. Regular earthquakes might similarly be predictable but with a limited predictable horizon of the order of their durations.

Original languageEnglish
Article numbereaaz5548
JournalScience Advances
Issue number27
Early online date1 Jul 2020
Publication statusPublished online - 1 Jul 2020


Dive into the research topics of 'The Predictable Chaos of Slow Earthquakes'. Together they form a unique fingerprint.

Cite this