British Geological Survey (BGS) GeoIndex - Hazards data theme

GeoIndex Hazards theme (GeoIndex.Hazards.theme)

Data from the British Geological Survey's GeoIndex Hazards theme are made available for viewing here. GeoIndex is a website that allows users to search for information about BGS data collections covering the UK and other areas world wide. Access is free, the interface is easy to use, and it has been developed to enable users to check coverage of different types of data and find out some background information about the data. More detailed information can be obtained by further enquiry via the web site: www.bgs.ac.uk/geoindex.This layer is only available at specific zoom levels. Please zoom to a larger scale to interrogate the map.

GBR BGS Landslides (Landslides)

Information for this layer of the map based index (GeoIndex) is taken from the BGS National Landslide Database (NLD), which holds over 15000 records of landslides and is the definitive source of landslide information for Great Britain (excludes Northern Ireland, Isle of Man and the Channel Islands). Each landslide within the National Landslide Database is identified by a National Landslide Database ID number and a point location, as shown on this map. The National Landslide Database ID number represents an individual survey of a landslide, rather than just the landslide itself. This is because there could be several phases of movement within or extensions to the same landslide, particularly if it is a large and complex one. Subsequent surveys of the same landslide may be recorded in the database with the same National Landslide Database ID number but with a new Survey Number. Other information given for each record include; Landslide name, grid reference and whether the landslide record has been validated by the BGS Landslides Team. The point symbols at the designated location do not reflect the size and shape of the corresponding landslide, but just denote the recorded presence of a landslide within a range of accuracy. This layer is only available at specific zoom levels. Please zoom to a larger scale to interrogate the map.

GBR BGS Historical earthquakes (Historical.earthquakes)

This layer shows the location of historical earthquakes within the UK. The British Geological Survey (BGS) has been charged with the task of operating and further developing a uniform network of seismograph stations throughout the UK in order to acquire standardised data on a long-term basis. The project is supported by a group of organisations under the chairmanship of the Office for Nuclear Regulation (ONR) with major financial input from the Natural Environment Research Council (NERC). The aims of the BGS Seismic Monitoring and Information Service are to develop and maintain a national database of seismic activity in the UK for use in seismic hazard assessment, and to provide near-immediate responses to the occurrence, or reported occurrence, of significant events to its customers and sponsors. A 24-hr on-call service is maintained for this purpose. Almost every week, seismic events are reported to be felt somewhere in the UK. A number of these prove to be sonic booms or are otherwise spurious, but a large proportion are natural or mining induced earthquakes often felt at intensities which cause concern and, occasionally, some damage. In an average year, some 200 earthquakes are detected and located by BGS with around 15% being felt by people. This BGS historical catalogue has been compiled, in general, from macroseismic observations (i.e. felt effects). Before 1700, only earthquakes with magnitudes of 4.0 ML or greater are included. After 1700, all known events with magnitudes of 3.0 ML or greater are included together with some other, smaller ones. Accuracies of magnitude, location, and origin time vary with the quality of information available for this period. For more information about earthquakes, visit www.earthquakes.bgs.ac.uk or contact enquiries@bgs.ac.uk. This layer is only available at specific zoom levels. Please zoom to a larger scale to interrogate the map.