Sanne Cottaar from the University of Cambridge will be the Bullerwell Lecturer for 2019. This lecture, to be given by ‘An outstanding early career British Geophysicist’ has been presented each year since 1981 and is one of the principal events in the British Geophysical Association calendar. For more details about Sanne’s research, see https://www.esc.cam.ac.uk/directory/dr-sanne-cottaar