20261006 11095400 1.0 FALSE ItemDescription BGS_SEISMIC_HAZARD_MAPS_UK_0P2SA_5000_WGS84.tif 002 -14.875000 3.375000 47.562500 63.937500 1 Geographic GCS_WGS_1984 Angular Unit: Degree (0.017453) <GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.6.0'><WKT>GEOGCS[&quot;GCS_WGS_1984&quot;,DATUM[&quot;D_WGS_1984&quot;,SPHEROID[&quot;WGS_1984&quot;,6378137.0,298.257223563]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433],AUTHORITY[&quot;EPSG&quot;,4326]]</WKT><XOrigin>-400</XOrigin><YOrigin>-400</YOrigin><XYScale>11258999068426.238</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>8.983152841195215e-09</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4326</WKID><LatestWKID>4326</LatestWKID></GeographicCoordinateSystem> 32 FALSE None 1 TIFF FALSE continuous floating point 0 20261006 13345600 20261006 13345600 57d10c74-c37c-5d5f-e063-3050940a43b5 dataset British Geological Survey +44 131 667 1000 The Lyell Centre, Research Avenue South EDINBURGH LOTHIAN EH14 4AP GB enquiries@bgs.ac.uk 20261006 ArcGIS Metadata 1.0 txt Enquiries British Geological Survey 0115 936 3142 0115 936 3276 The Lyell Centre, Research Avenue South EDINBURGH LOTHIAN EH14 4AP GB enquiries@bgs.ac.uk Enquiries British Geological Survey GB not available https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192851 WWW:DOWNLOAD-1.0-http--download Data https://doi.org/10.5285/c9013191-cc5f-428a-a3e8-fb4560f2e689 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Mosca, I. (2026). The 2026 seismic hazard maps for the United Kingdom, the Channel Islands, and the offshore Exclusive Economic Zone. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/c9013191-cc5f-428a-a3e8-fb4560f2e689 The 2026 seismic hazard maps for the United Kingdom, the Channel Islands, and the offshore Exclusive Economic Zone 2026-07-23 http://data.bgs.ac.uk/id/dataHolding/13608753 The 2026 offshore and onshore seismic hazard maps cover the UK, the Channel Islands, and the UK offshore Exclusive Economic Zone EEZ (UK commercial waters). The data comprises a grid of 4663 points that are spaced 0.125° in latitude and 0.25° in longitude, and is developed for an additional ground motion parameter, spectral acceleration at 0.15 s. Therefore, the 2026 hazard maps are for four ground motion parameters, i.e. peak ground acceleration (PGA), spectral acceleration at 0.15 s (SA0.15 s), 0.2 s (SA0.2 s) and 1.0 s (SA1.0 s), for 5% damping and rock conditions and five return periods, i.e. 95, 475, 1100, 2475, and 5000 years. The report of Mosca (2026) describes these updated maps in detail, whereas the technical report by Mosca et al. (2024) provides a detailed description of the methods (see also http://www.earthquakes.bgs.ac.uk/hazard/UKhazard.html). The input data to compute the maps are in in Mosca et al. (2025; DOI: https://doi.org/10.5285/a6babafa-5c82-4e76-aef5-27441104187f). The map for spectral acceleration at 0.15 s has been used to calibrate the seismic design requirements in the second-generation Eurocode 8 to the hazard levels of the UK and will be cited in the British Standards UK National Annex and PD6698. http://data.bgs.ac.uk/id/dataHolding/13608753 The 2026 offshore and onshore seismic hazard maps cover the UK, the Channel Islands, and the UK offshore Exclusive Economic Zone EEZ (UK commercial waters). The data comprises a grid of 4663 points that are spaced 0.125° in latitude and 0.25° in longitude, and is developed for an additional ground motion parameter, spectral acceleration at 0.15 s. Therefore, the 2026 hazard maps are for four ground motion parameters, i.e. peak ground acceleration (PGA), spectral acceleration at 0.15 s (SA0.15 s), 0.2 s (SA0.2 s) and 1.0 s (SA1.0 s), for 5% damping and rock conditions and five return periods, i.e. 95, 475, 1100, 2475, and 5000 years. The report of Mosca (2026) describes these updated maps in detail, whereas the technical report by Mosca et al. (2024) provides a detailed description of the methods (see also http://www.earthquakes.bgs.ac.uk/hazard/UKhazard.html). The input data to compute the maps are in in Mosca et al. (2025; DOI: https://doi.org/10.5285/a6babafa-5c82-4e76-aef5-27441104187f). The map for spectral acceleration at 0.15 s has been used to calibrate the seismic design requirements in the second-generation Eurocode 8 to the hazard levels of the UK and will be cited in the British Standards UK National Annex and PD6698. http://data.bgs.ac.uk/id/dataHolding/13608753 The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Enquiries British Geological Survey 0115 936 3142 0115 936 3276 The Lyell Centre, Research Avenue South EDINBURGH LOTHIAN EH14 4AP GB enquiries@bgs.ac.uk Enquiries British Geological Survey 0115 936 3142 0115 936 3276 The Lyell Centre, Research Avenue South EDINBURGH LOTHIAN EH14 4AP GB enquiries@bgs.ac.uk Enquiries British Geological Survey GB not available Enquiries British Geological Survey GB not available https://resources.bgs.ac.uk/images/geonetworkThumbs/57d10c74-c37c-5d5f-e063-3050940a43b5.png Natural hazards Seismic data BGS Thesaurus of Geosciences 2022 NERC_DDC Natural hazards Seismic data NERC_DDC Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" Esri ArcGIS 13.6.3.59530 -14.90 3.40 47.44 63.89 ISO 3166_1 alpha-3 2009 GB British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 UK CONTINENTAL SHELF [id=121701] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 UK [id=139300] ISO 3166_2 2009 UKM true -14.875 3.375 47.5625 63.9375 1 -14.875000 3.375000 63.937500 47.562500 dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false We use probabilistic seismic hazard analysis (PSHA) to produce a probabilistic description of expected ground shaking that may occur at a site. This consists of four steps: 1) Definition of seismic sources based on the tectonics, geology and seismicity in the region, forming a seismic source model. 2) Quantification of the rate of earthquake occurrence for each seismic source using the Gutenberg-Richter law. 3) Characterisation of the earthquake effects. 4) Estimation of the hazard at the site(s) by integrating over the seismic sources for the location and size of future earthquakes with expected ground shaking. We used Monte Carlo-based PSHA to generate artificial catalogues by random sampling of the probability distributions in the seismic source model and computing the predicted ground motion for the synthetic events. 2 73 0.250000 131 0.125000 true false -14.875000 47.562500 -14.875000 63.937500 3.375000 63.937500 3.375000 47.562500 -5.750000 55.750000 http://www.opengis.net/def/crs/EPSG/0/27700 6.2(3.0.1) Band_1 0.0544 0.0048 Unified Code of Units of Measure 32 http://data.bgs.ac.uk/id/dataHolding/13608753