The 1983 Chagos Archipelago earthquake occurred on November 30 at 17:46 UTC (23:46 local time) in the region of the Chagos Archipelago, British Indian Ocean Territory. This earthquake had a moment magnitude and surface-wave magnitude of 7.7.[1] This earthquake occurred in the Indian plate near the Central Indian Ridge. The Central Indian Ridge is unusually active in near-ridge earthquakes. The intense seismic activity in this region may indicate an early stage of converging plate boundary, which is responsible for the N–S extension near Chagos. There was a 40 cm tsunami reported in Victoria, Seychelles.[2][3]

References

  1. ^ ISC (2022), ISC-GEM Global Instrumental Earthquake Catalogue (1904–2018), Version 9.1, International Seismological Centre, doi:10.31905/D808B825
  2. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-06-14. Retrieved 2010-10-16.{{cite web}}: CS1 maint: archived copy as title (link)
  3. ^ "Significant Earthquakes of the World". Archived from the original on 2009-12-04.
Allikas: http://en.wikipedia.org/wiki/1983_Chagos_Archipelago_earthquake
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