1984 San Pedro Basin earthquake
# 1984 San Pedro Basin earthquake

The 1984 San Pedro Basin earthquake occurred on June 24 at 07:17:14 local time with a moment magnitude of 6.7 and a maximum Mercalli intensity of VII (Very strong). The event occurred off the southern coast of the Dominican Republic and resulted in an estimated five fatalities.

## Tectonic setting

The northern boundary of the Caribbean Plate is a diffuse zone of varied fault types. The Muertos Trough marks the southern portion of this zone of deformation with north dipping convergence.

## Earthquake

This thrust earthquake occurred on a shallow and north-dipping fault and, at the time, it was the largest instrumentally recorded event in the Los Muertos Trough.

## Intensity

The United States Geological Survey estimated that more than 227,000 people were exposed to intensity VII (Very strong) shaking and more than 2.8 million experienced intensity VI (Strong) shaking.

## Aftershock

Five hours after the mainshock, a destructive 5.2 $M_w$  aftershock occurred about 5–10 miles to the northeast. Five deaths are also attributed to this event.

