Firstov, P. P., Yakovleva, V. S., Shirokov, V. A. and Malysheva, O. P. (2007) “The nexus of soil radon and hydrogen dynamics and seismicity of the northern flank of the Kuril-Kamchatka subduction zone”, Annals of Geophysics, 50(4). doi: 10.4401/ag-3068.