1Institute for Risk Assessment Sciences, Yalelaan 2, 3584 CM, The Netherlands
2Faculty of Geosciences, University of Utrecht, Budapestlaan 4, 3584 CD Utrecht, The Netherlands
3Volcanology and Geological Hazard Mitigation, Jalan Cendana 15, Yogyakarta, Indonesia
4Soegijapranata Catholic University, Jl. Pawiyatan Luhur IV/I, Bendang Duwur, Semarang 50234, Indonesia
5National Institute of Public Health and the Environment (RIVM), Antonie van Leeuwenhoeklaan 9, 3721 MA, Bilthoven, The Netherlands
6European Commission, Joint Research Institute, Via E. Fermi 1, I-21020, Ispra (VA), Italy