Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

488 G. Neilson and P. W. Burton8-11. Shide, Isle of WightThis observatory was founded in 1895 by John Milne on his return from Japan. Abrick pier was erected on a concrete foundation in an old stable. The first instrumentwas in operation by August 16, 1895. In 1896 another instrument was installed,for comparison, at nearby Carisbrooke Castle. A laboratory for testing equipmentwas added in 1900. The number and type of instruments running at Shide variedfrom time to time; for example, in 1902 seven horizontal components of varioustypes were in operation together with a vertical instrument. The principal typeof seismograph that operated at Shide was the Milne horizontal pendulum. Theobservatory closed in 1913.8.12. Stonyhurst CollegeThe original instrument with which this observatory was equipped was the Milnependulum, which was used in the Antarctic by the KDiscoveryn expedition. It wasinstalled in 1908 and set up as an E W component. Recording with the Milne ceasedin 1924, and it was replaced by a Milne-Shaw instrument in 1928. This was also setup as an EW component. Recording was suspended in 1947.3.13. West BromwichThis observatory was established by J. J. Shaw in 1909. The first instrument inuse was a twin boom Omori horizontal pendulum and the two components were N-Sand EW. The static magnification was 60 and the free period was 12 seconds. By1916 two Milne-Shaw instruments were in operation. Shaw used this observatorymainly for experimental work on instruments. (He was responsible for introducingdamping to the Milne design thus producing the Milne-Shaw.) The observatoryceased operation shortly after Shaw’s death in 1946.ACKNOWLEDGEMENTSThis work was supported by the Natural Environment Research Council andis published with the approval of the Director of the British Geological Survey(NERC).REFERENCESAnderson, A. (1901). The Coats Observatory, Its History and Equipment, J&R Parlane,Paisley.British Association (1841-1844). Report of the British Association for the Advancementof Science, 1841, 46-50; 1842, 92-98; 1843, 120-127; 1844, 85-90.British Association (1870-1876). Reports of the Committee on Earthquakes in Scotland,Report of the British Association for the Advancement of Science, 1870, 48-49; 1871,197-198; 1872, 240-241; 1873, 194-197; 1874, 241; 1875, 64-65; 1876, 74.Browitt, C. W. A., T. “urbitt, and S. N. Morgan (1985). Investigation of British earthquakesusing the national monitoring network of the British Geological Survey, inEarthquake Engineering in Britian, Thomas Telford, London, 33-47.Burton, P. W., R. M. W. Musson, and G. Neilson (1984). Studies of Historical BritishEarthquakes, Brit. Geol. Survey Glob. Seism. Unit, Report No. 237.Crampin, S., A. W. B. Jacob, A. Miller, and G. Neilson (1970). The LOWNET RadiolinkedSeismometer Network in Scotland, Geophys. J. R. Astr. SOC., 21, 207-216.