Evidence for fluid bodies beneath the Sulphur Springs Geothermal Region, St. Lucia, West Indies

During a 39-day microearthquake survey in the Sulphur Springs geothermal region, St. Lucia, seven local hypocenters were determined. Emergent P onsets and missing S-waves were observed for five of these, and attenuated S-waves recorded for two regional events. These imply the presence of at least two significant fluid bodies beneath the area. Ground noise measurements near natural steam vents suggest a deep source for the steam.