Deligne NI, Miller CA, Ashraf S, Behr Y, Fournier N, Jolly AD, Hamling IJ, Leonard GS, Scott BJ, Sherburn S, et al. 2019. Material provided to the Vanuatu Meteorology and Geo-Hazards Department by GNS Science in response to Ambrym volcano activity in December 2018–early 2019. Lower Hutt (NZ): GNS Science. 53 p. (GNS Science report; 2019/74). doi:10.21420/Q9HT-HD56.
In December 2018, Ambrym Volcano in Vanuatu entered a period of heightened activity, with a marked change in summit lava lake activity and felt seismicity, a summit rift eruption, the appearance of cracks along the eastern rift zone, and other obvious deformation (e.g. uplifted beaches). This heightened activity continued for several weeks and, at the time, there was considerable uncertainty and concern as to how the situation would unfold. This report compiles documents provided to the Vanuatu Meteorology and Geo-Hazard Department (VMGD) via email by GNS Science staff in support of VMGD’s response to the Ambrym crises of December 2018 and January 2019. The aim is to consolidate information, both as a general reference for what was provided at the time and also to refer to during future volcanic crises in Vanuatu and elsewhere. (auth)