1. psd::Tohoku
    Observations of teleseismic strains from the 2011 Tohoku earthquake.
    data.frame|16000 x 18
  2. psd::hfsnm
    Noise levels found in PBO strainmeter data at seismic frequencies.
  3. psd::magnet
    A single line of Project MAGNET horizontal field intensity
  4. psd::wipp30
    Water levels from borehole WIPP30
    matrix|13413 x 4