Science Advances

Supplementary Materials

This PDF file includes:

  • Differential interstation distance from source
  • Coda arrivals in NCFs
  • Two reference functions
  • Expected change in dv/v from strain data
  • Frequency variations in the volcanic tremor source
  • dv/v measured between 0.1 and 0.3 Hz
  • Robustness of positive correlation between radial tilt and dv/v and comparison with meteorological effects and seismicity
  • fig. S1. Explanation of differential interstation distance from source.
  • fig. S2. Decay of coherent coda wave arrivals in the NCFs.
  • fig. S3. Results when using two reference functions.
  • fig. S4. Detailed view of frequency content of the volcanic tremor source and dv/v.
  • fig. S5. Comparison of dv/v with 0.33- to 1-Hz and 0.1- to 0.3-Hz filters.
  • fig. S6. Radial tilt-dv/v correlation and its association with meteorological effects and seismicity.

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