Yesterday, a powerful earthquake struck just 80 miles outside of Jamaica and southwest of Cuba. The vibrations were so strong that they could be felt in the Cayman Islands and as far as Miami.

There were several aftershocks, some as strong as 6.1, that came after the initial quake.

“Based on all available data, there is no significant tsunami threat from this (6.1) earthquake. However, there is a very small possibility of tsunami waves along coasts located nearest the epicenter,” the National Weather Service’s Pacific Tsunami Warning Center said.

Alerts immediately went out for the potential of a subsequent tsunami. A small tsunami was reported in the Cayman Islands but none were reported in Jamaica or Cuba, the two areas closest to the epicenter.

Residents in Miami reported feeling buildings shake for as long as 30 seconds in some areas. There was lots of confusion as many did not realize what was happening in the moment.

According to CNN, this earthquake appears to have been a “strike-slip earthquake,” in which tectonic plates slide against each other. This limits the threat of a devastating tsunami, which is more associated with “thrust earthquakes,” where a portion of the earth is thrust upward and causes the water to push up and outward, creating the tsunami.

As of now, there have been no casualties reported.