Data supplement to: Local magnetic anomalies in rugged volcanic terrain explain bias in paleomagnetic data: consequences for sampling

The dataset contains measurements made with a fluxgate magnetometer of the ambient geomagnetic field on Mt. Etna, Italy. Measurements were made in April 2018. The purpose of this work was to test how the underlying terrain influences the magnetic field just above the surface of the lava flows. The FLUX1-5.csv files contains all measurements made with the fluxgate magnetometers at five different sites (FLUX 1-5). Measurements were made at three different paths (Path 1, 2 and 3) at different heights above the surface. For FLUX1-4 this is 100 and 180cm , for FLUX5 it is 25, 75, 125, and 175cm. First columns contains the GPS location of every measurement. The distance between each measurement and the specific height is calculated from the GPS data. Inclination, declination and intensity results are in the last columns. In this updated version of the dataset an error in FLUX4 has been fixed. Detailed information about the files as well as information on how the data is processed is given in the explanatory file readme.txt. Contact person: Romy Meyer - Researcher - r.meyer@uu.nl