The National Network Stations of the Saudi Geological Survey (SGS) detected two earth tremors in Harat Al-Shaqah, measuring 3.6 and 4.0 on the Richter scale and were at a depth of 7.8 km and 7.2 km respectively. SGS also said the earth tremors occurred from 12 pm on Tuesday to 12 pm today, adding that a number of tremors measuring less than 3 on the Richter scale were detected. SGS confirmed that the thermal measurements are normal.