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The larger of the two occurred around 6:52 a.m., 376 kilometres east of Bridgetown, Barbados; 532 km east of Castries, St. Lucia; and 555 km east south east of Fort-de-France, Martinique, according to University of the West Indies’ Seismic Research Centre (SRC).
The preliminary strength of the quake, given in the automated earthquake location system, was 6.4 magnitude. However, it was later put at 6.9 magnitude, at a depth of 155 kilometres, after the results were reviewed by a seismologist.
Just about two hours earlier, at 4:56 a.m., a 3.0 magnitude quake occurred 59 kilometres north northeast of St. John’s, Antigua and Barbuda; 121 kilometres east northeast of Basseterre, St. Kitts and Nevis; and 153 kilometres north of Point-à-Pitre, Guadeloupe.
Following the tremors, residents expressed concern on the SRC Facebook page about the frequency and intensity of earthquakes across the world.