Science Advances

Supplementary Materials

This PDF file includes:

  • section S1. Supplemental text: Algorithms
  • section S2. Supplemental text: Further discussion of results
  • fig. S1. Distribution of earthquake depths by cluster.
  • fig. S2. Energy loss due to attenuation, as a function of distance across the area of
    the Geysers reservoir, parameterized by Qp and ω or f.
  • fig. S3. Distribution of earthquake magnitudes by cluster.
  • fig. S4. Kernel density estimators of the histogram values for each cluster.
  • fig. S5. HMM with 49 states, station SQK.
  • fig. S6. K-means objective function versus J, the number of clusters chosen.
  • fig. S7. HMM with 15 states, station SQK.
  • fig. S8. HMM with 49 states, station STY.
  • fig. S9. Clustering with signals from both stations SQK and STY combined (49 HMM states,5 clusters).
  • fig. S10. Three most characteristic waveforms and associated spectrograms and fingerprints (from top to bottom) from the two clusters associated with maximum (C1) and minimum (C4)fluid injection rates for station SQK.
  • fig. S11. Three most characteristic waveforms and associated spectrograms and fingerprints (from top to bottom) from the two clusters associated with maximum (C1) and minimum (C4)fluid injection rates for station STY.
  • table S1. List of attached audified sounds and their characteristics.

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Other Supplementary Material for this manuscript includes the following:

  • audio S1 to S24 (.wav format). Audified seismic data from the three most characteristic earthquakes in each of clusters C1 to C4 (table S1).
  • movie S1 (.mp4 format). Animation of the Geysers earthquake catalog, without and with clustering information.

Files in this Data Supplement: