At the dawn of the 1950’s, Tikhonov (USSR) and Cagniard (France) independently determined that by measuring the geoelectric and geomagnetic fields at ground level, one could reconstruct the variations of the electrical conductivity below ground level as a function of depth, the origin of the magnetotelluric (MT) method. While initially ...
Cometary surfaces are geologically active worlds shaped by complex erosional and sediment transport processes. By documenting the diverse terrains of comet 67P/Churyumov - Gerasimenko, we show that the nucleus’s hemispherical landscape dichotomy is driven by asymmetric seasonal solar heating, which facilitates the net transport of sediment from the comet’s south ...
