1. School of Earth Science University College Dublin Belfield Dublin D04 V1W8 Republic of Ireland
2. Irish Centre for Research in Applied Geoscience University College Dublin Belfield Dublin D04 V1W8 Republic of Ireland
3. Applied Geophysics and Technology Tullow Oil Ltd. Dublin D18 NH10 Ireland
4. School of Cosmic Physics Dublin Institute of Advanced Studies Dublin D02 Y006 Republic of Ireland