1974 Lesser Antilles earthquake

Earthquake off the coast of Antigua, Lesser Antilles 1974 Lesser Antilles earthquake Caribbean#Antigua and Barbuda 1974-10-08 09:50:58 736214 iscgem736214 1974 10 8 05:50:58 6.9 w y 35.2 km mi 0 on 17.3 -62.0 region:XA_type:event inline,title Normal Moderate VIII 4 injured The 1974 Lesser Antilles earthquake occurred at 05:50:58 local time 09:50:58 UTC on October 8 with a moment magnitude of 6.9 and a maximum Mercalli intensity of VIII (Severe). Four people were injured in what the United States' National Geophysical Data Center called a moderately destructive event. Tectonic setting Volcanic arc While the northern and southern boundary of the Caribbean plate are complex and diffuse, with zones of seismicity stretching several hundred kilometers across, the eastern boundary is that of the Lesser Antilles subduction zone. This 850 km on long subduction zone lacks a uniform curve and has an average dip of 50–60°. The largest known earthquake on the plate interface was a M7.5–8.0 event in 1843, but it did not generate a large tsunami. In opposition, the three largest events between 1950 and 1978 were intraplate normal faulting events.Active Faults of the World https://books.google.com/books?id=aQUgAwAAQBAJ Yeats R. 2012 Cambridge University Press 978-0521190855 146–148, 159–161 See also Lesser Antilles List of earthquakes in 1974 List of earthquakes in the Caribbean References ISC-GEM Global Instrumental Earthquake Catalogue (1900–2013) http://www.isc.ac.uk/iscgem/index.php ISC 2017 International Seismological Centre Version 4.0 A large normal-fault earthquake in the overriding wedge of the Lesser Antilles subduction zone: The earthquake of 8 October 1974 http://www.ipgp.fr/~beaudu/download/1982_McCann_1974.pdf W. R. McCann J. W. Dewey A. J. Murphy S. T. Harding 1982 Bulletin of the Seismological Society of America 72 6A 2267–2283 Significant Earthquake Database https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 https://web.archive.org/web/20060929000601/http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 dead September 29, 2006 National Geophysical Data Center / World Data Service (NGDC/WDS) National Geophysical Data Center, NOAA 10.7289/V5TD9V7K 1972 Data Set PAGER-CAT Earthquake Catalog https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/ September 4, 2009 United States Geological Survey Version 2008_06.1 Sources Reconnaissance report of the Antigua, West Indies, earthquake of October 8, 1974 https://pubs.geoscienceworld.org/ssa/bssa/article/65/6/1553/117480/Reconnaissance-report-of-the-Antigua-West-Indies J. F. Tomblin W. P. Aspinall 1975 Bulletin of the Seismological Society of America 65 6 1553–1573 10.1785/BSSA0650061553 1975BuSSA..65.1553T 130249609 subscription External links Antigua & Barbuda remembers ’74 quake – The Daily Observer 736214 Category:1974 earthquakes Category:1974 in the Caribbean Category:Earthquakes in the Caribbean Category:Natural disasters in Antigua and Barbuda