Fig. 1: Seismic wave velocity anisotropies in hcp-FeH0.25.
From: Superionic effect and anisotropic texture in Earth’s inner core driven by geomagnetic field

a The velocity anisotropies (AVP) in FeH0.25 at 360 GPa and 0–6000 K. Different color curves represent velocities at temperatures from 0 to 6000 K, noting the percentage of the AVP. The azimuthal angle of 0° corresponds to the velocity along the a-axis, while 90° corresponds to the c-axis. b The velocity anisotropies in Fe-H alloys with different H contents at 360 GPa and 6000 K. Different color curves represent velocities in FeH0.25, FeH0.125, and FeH0.0625, and the velocities in FeH0.25 at 330 GPa and 5500 K are shown with a dashed curve. The dashed gray lines show the trend of the slowest axis with increasing temperature and hydrogen content, respectively.