The national network of seismic monitoring recorded a number of weak tremors in Harat Al Shaqqah. The strongest of the tremors was 2.51 on the Richter scale, from twelve o'clock noon on Thursday until twelve o'clock noon today. In a statement, the Saudi Geological Survey (SGS) authority confirmed that all the variables in terms of thermal measurements and concentrations of radon gas, carbon dioxide, and the widening of ground cracks are at safe rates.