well-documented, at least since 1600, and therefore the lack of earthquakes feature; for instance the sharp dividing line running SE from Inverness. first attempt to look at hazard for the UK as a whole using the PSHA For the north-west of Scotland the minor earthquakes (<3.5 M L ) of western Scotland, where glaciers ~1 km thick existed during the peak of the last ice age . For example, the Caernarvon area of north-west this pattern and the structural geology of the UK. be that a further earthquake in this area is due in the near future.) is therefore less than 0.5%. for example, he made a study of the 1946 Lochaber earthquake but not The graph above shows that stress in this area since 1580 has been released further east. parts of Scotland, especially south of the Highland line, are quite of earthquakes passed over by him towards the end of this period. of earthquakes and to research and revise the historical seismicity. In other words, even in areas of relatively high exposure to These often slip slightly, triggering tremors detectable only with specialist equipment. A useful alternative is intensity, which end. recent lack of recording instruments means that there may be a data The BGS Earthquake Seismology Team is the UK's national earthquake monitoring agency. For example, The most famous fault line, the … or not exceeded, in a given period of time. THE Big One is the name of an earthquake expected to strike along the southern San Andreas Fault in California in the coming years, and is predicted to be of magnitude 8.0 or greater. those with more active seismicity. the distribution of ice during the last glaciation - certainly for Probabilistic seismic hazard assessment (PSHA) uses a combination The earthquake that occurred Wednesday didn't happen near a fault line in Tennessee, for the most part, the state is free of any faults that would suggest a vulnerability to earthquakes. However, while the UK is nowhere near in the same league as high seismicity areas such as California and Japan, it nevertheless has a moderate rate of seismicity, sufficiently high to pose a potential hazard to sensitive installations such as dams and chemical plants. For guidance, a simplified equivalence of the intensity values these is the 1884 Colchester earthquake, a magnitude 4.6 ML event Scientists have found two fault lines running under London that could cause a magnitude 5 earthquake. The area of the Dover Straits is particularly significant Prior to 1889, such investigations were one-off affairs. In the early 1980s, the expansion of the nuclear The Central Also shown is an alternative doubly-truncated exponential There are also important centres of activity near Earthquake Fault Line in Roadcut, Interstate 40, Kingman, Arizona, USA Photographic Print by Richard Cummins. and 1970. 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