Oswald Garrison Villard

Low‐frequency magnetic field measurements near the epicenter of the M_s 7.1 Loma Prieta Earthquake

A. C. Fraser‐Smith, Andrea Bernardi, Paul McGill et al. · Geophysical Research Letters · 1990 · 635 citations

Geophysics, Magnetic Precursors, October 1989 +14

Observation of large-scale traveling ionospheric disturbances by spaced-path high-frequency instantaneous-frequency measurements

K. L. Chan, Oswald Garrison Villard · Journal of Geophysical Research Atmospheres · 1962 · 114 citations

Geophysics, Engineering, Puerto Rico +11

ULF magnetic field measurements near the epicenter of the Ms 7.1 Loma Prieta earthquake

Andrea Bernardi, A. C. Fraser‐Smith, Paul McGill et al. · Physics of The Earth and Planetary Interiors · 1991 · 112 citations

Ultra‐low frequency magnetic field measurements in southern California during the Northridge Earthquake of 17 January 1994

A. C. Fraser‐Smith, Paul McGill, R. A. Helliwell et al. · Geophysical Research Letters · 1994 · 67 citations · Full text

Engineering, Seismic Wave, Earthquake Hazards +17

Regularly-observable aspect-sensitive radio reflections from ionization aligned with the Earth's magnetic field and located within the ionospheric layers at middle latitudes

A. Peterson, Oswald Garrison Villard, R. L. Leadabrand et al. · Journal of Geophysical Research Atmospheres · 1955 · 67 citations

Geophysics, Ionospheric Layers, Middle Latitudes +7