| Phase transition Clapeyron slopes and transition zone seismic discontinuity topography CR Bina, G Helffrich Journal of Geophysical Research: Solid Earth 99 (B8), 15853-15860, 1994 | 647 | 1994 |
| The Earth's mantle GR Helffrich, BJ Wood Nature 412 (6846), 501-507, 2001 | 425 | 2001 |
| Topography of the transition zone seismic discontinuities G Helffrich Reviews of Geophysics 38 (1), 141-158, 2000 | 332 | 2000 |
| Crystallization of silicon dioxide and compositional evolution of the Earth’s core K Hirose, G Morard, R Sinmyo, K Umemoto, J Hernlund, G Helffrich, ... Nature 543 (7643), 99-102, 2017 | 216 | 2017 |
| Outer-core compositional stratification from observed core wave speed profiles G Helffrich, S Kaneshima Nature 468 (7325), 807-810, 2010 | 214 | 2010 |
| Dipping low-velocity layer in the mid-lower mantle: evidence for geochemical heterogeneity S Kaneshima, G Helffrich Science 283 (5409), 1888-1892, 1999 | 173 | 1999 |
| Extended-time multitaper frequency domain cross-correlation receiver-function estimation G Helffrich Bulletin of the Seismological Society of America 96 (1), 344-347, 2006 | 170 | 2006 |
| Subduction zone thermal structure and mineralogy and their relationship to seismic wave reflections and conversions at the slab/mantle interface GR Helffrich, S Stein, BJ Wood Journal of Geophysical Research: Solid Earth 94 (B1), 753-763, 1989 | 147 | 1989 |
| Topography of the “410” and “660” km seismic discontinuities in the Izu‐Bonin subduction zone JD Collier, GR Helffrich Geophysical Research Letters 24 (12), 1535-1538, 1997 | 134 | 1997 |
| The seismic analysis code: A primer and user's guide G Helffrich, J Wookey, I Bastow Cambridge University Press, 2013 | 131 | 2013 |
| How good are routinely determined focal mechanisms? Empirical statistics based on a comparison of Harvard, USGS and ERI moment tensors GR Helffrich Geophysical Journal International 131 (3), 741-750, 1997 | 125 | 1997 |
| Emergence and evolution of Santa Maria Island (Azores)—The conundrum of uplifted islands revisited RS Ramalho, G Helffrich, J Madeira, M Cosca, C Thomas, R Quartau, ... Bulletin 129 (3-4), 372-390, 2017 | 123 | 2017 |
| Precambrian crustal evolution: seismic constraints from the Canadian Shield DA Thompson, ID Bastow, G Helffrich, JM Kendall, J Wookey, DB Snyder, ... Earth and Planetary Science Letters 297 (3-4), 655-666, 2010 | 122 | 2010 |
| Detection of lower mantle scatterers northeast of the Marianna subduction zone using short‐period array data S Kaneshima, G Helffrich Journal of Geophysical Research: Solid Earth 103 (B3), 4825-4838, 1998 | 115 | 1998 |
| Hazard potential of volcanic flank collapses raised by new megatsunami evidence RS Ramalho, G Winckler, J Madeira, GR Helffrich, A Hipólito, R Quartau, ... Science advances 1 (9), e1500456, 2015 | 113 | 2015 |
| Calculation of elastic properties from thermodynamic equation of state principles CR Bina, GR Helffrich Annual Review of Earth and Planetary Sciences, Vol. 20, p. 527 20, 527, 1992 | 113 | 1992 |
| Seismic discontinuities and subduction zones JD Collier, GR Helffrich, BJ Wood Physics of the Earth and Planetary Interiors 127 (1-4), 35-49, 2001 | 109 | 2001 |
| Depleted swell root beneath the Cape Verde Islands A Lodge, G Helffrich Geology 34 (6), 449-452, 2006 | 105 | 2006 |
| Tracers of uplift and subsidence in the Cape Verde Archipelago RAS Ramalho, RAS Ramalho Building the Cape Verde Islands, 79-138, 2011 | 104 | 2011 |
| 410 km discontinuity sharpness and the form of the olivine α-β phase diagram: resolution of apparent seismic contradictions GR Helffrich, BJ Wood Geophysical Journal International 126 (2), F7-F12, 1996 | 103 | 1996 |
