Where is Dr. Sattler when the power goes out in the book Jurassic Park?

In Michael Crichton's novel "Jurassic Park," Dr. Ellie Sattler is at the park's visitor center when the power goes out. She is initially in the control room with Dr. Ian Malcolm and other staff members as they assess the situation. The power outage leads to chaos, as the security systems fail and the dinosaurs are released from their enclosures.