The earth tremor felt on Wednesday morning was caused by shock waves from a regional earthquake originating from the Longido town of Tanzania, according to the Kenya Meteorological Department.

In a statement issued hours after the 10:35am tremor, the Kenya Meteorological Department revealed that the tremor was of 4.5 magnitude and originated 81 kilometres west northwest of the Tanzanian town at 2.574°S, 35.983°E. "Yes, tremors felt in Nairobi this morning were due to a regional earthquake...The tremors were caused by shock waves from this earthquake," Kenya Met stated.

According to Volcano Discovery, one of the institutions that track earth activities, a moderate magnitude 4.5 earthquake struck 91 km from Kiratu, Arusha Region, Tanzania, on Wednesday morning at 10:35am local time.

A photo of the aerial view of Nairobi City Photo Kenya Pics This occurred around the same time tremors were reported in Nairobi.