The region of Cheb on Saturday registered an earthquake measuring 4.5 on the Richter scale, a week after seeing similar activity last week. The tremors were the strongest in several years. Fire fighters found cracks in some walls and a fallen chimney. The earthquake began below Nový Kostelec at a depth between eight and nine kilometers, a representative of the Academy of Sciences’ Geological Institute said. According to experts, the earthquakes this and last weekend could be part of a wave of increased seismic activity.