Lamont-Doherty Earth Observatory of Columbia University, 61 RT 9W, Palisades, NY 10964, USA
Lamont-Doherty Earth Observatory of Columbia University, 61 RT 9W, Palisades, NY 10964, USA; Geophysical Service RAS, 189 Lenin Str., Obninsk, Kaluga reg, 249020, Russian Federation