The ICDP OSG logging team performed a downhole measurement campaign in the borehole COSC-1 on September 9 to 12, 2014. Afterwards the OSG logging team and members of the GFZ Scientific Drilling platform prepared the geophone chain for a longer VSP experiment in COSC-1. These measurements will last until October 9, completed by a final downhole logging campaign beginning on October 10, 2014.