21st March. The Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (7). Posted on March 29, 2021March 29, 2021 VOLCANIC ERUPTION IN ICELAND 1440 × 1124 21st March. The Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (7). 21st March. The Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (7).