A USGS ShakeMap shows shaking intensity from a major magnitude 7.5 earthquake near Venezuela, where temblors struck the region on June 24. (Photo courtesy USGS) Powerful earthquakes on June 24 rocked Venezuela and briefly prompted the issuance of a Tsunami Advisory for Puerto Rico and the U.S. Virgin Islands. While the advisory was canceled, experts say the event serves as an important reminder that Caribbean earthquake and tsunami preparedness must be understood.