In the event of a seismic event, what is the immediate action for rescue teams?

Evacuating and reassessing the safety of the site is the most prudent immediate action for rescue teams following a seismic event. This step is critical because seismic activity can compromise the stability of underground workings and create new hazards, such as potential rockfalls or sudden flooding.

By evacuating personnel, teams prioritize the safety of everyone involved. Once safety is ensured through a reassessment, the rescue operators can determine whether it is safe to continue with efforts or if adjustments need to be made based on the new conditions. This dynamic response is essential because it acknowledges the risks introduced by the seismic event and allows for a thoughtful and safe approach to the rescue operations rather than continuing with a predetermined plan that may no longer be viable.

The other options neglect the necessary considerations for safety following such an unpredictable event, which is why they are not suitable immediate actions.