Muscat: An earthquake of magnitude 4.6 on the Richter scale was recorded by an earthquake monitoring station at 6:46pm in Oman on Sunday, an official from the centre said. “The epicentre of the earthquake was far from Salalah in the sea,” the official added. The earthquake was 10.0 km deep, according to the US Geological Survey. On September 2 also, an earthquake of magnitude 5 on the Richter scale was recorded in Salalah waters. In July, May and April, a series of earthquakes with magnitudes ranging between 4 and 5 on the Richter scale were recorded in the northern parts of Oman. According to experts, northern parts of the Sultanate are prone to earthquakes. Scientists who have studied the seismic zones of the Sultanate, say that based upon calculations on how the earth plates shake in a given geographic area (Peak Ground Acceleration), the highest probability has been found in the northernmost city of Khasab.