The enigmatic Bala earthquake of 1974


  • Acknowledgments. In drawing together the material for this paper on an earthquake that occurred 30 years ago, it has been necessary to revisit the working files of many past colleagues in IGS/BGS, whose contributions I would like to acknowledge collectively. The National Grid and other Ordnance Survey data are used with the permission of the Controller of Her Majesty's Stationery Office, Licence No: 100017897/2005. This paper is published with the permission of the Executive Director of the BGS (NERC).

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