SPRINGFIELD - Today, more than 228,000 Illinois residents participated in the 2021 Great Shakeout Earthquake Drill, an increase of more than 31,000 residents from 2020. At 10:21 a.m., registered participants stopped what they were doing and practiced the Drop, Cover, Hold On technique that is advised for personal protection during an earthquake. With active seismic zones flanking the state's eastern and western border, it is important that everyone know how to stay safe during an earthquake.