Information source Martinique and St Lucia Shaken By 5.4-Magnitude Earthquake Topics Earthquakes and Volcanic Activity Disasters & Disaster Assessment Countries Martinique Saint Lucia Teaser Martinique and St Lucia were shaken by a 5.4-magnitude earthquake on Monday, according to data from the United States Geological Survey. The quake occurred at around 4:09 PM local time at a depth of 15 kilometres. Source Caribbean Journal