A tsunami warning was not issued following the quake, according to the U.S. National Tsunami Warning Center.
The quake hit before 8:40 a.m. and was reported 102 miles west of Capetown and roughly 115 miles away from Eureka, the U.S. Geological Survey said.
The USGS said that two more earthquakes hit in the same area just minutes after the first, 5.8-magnitude one, hit. A 5.3- and a 5.1-magnitude quake hit a few minutes apart after the initial one.
![(USGS/screenshot)](/_next/image?url=https%3A%2F%2Fimg.theepochtimes.com%2Fassets%2Fuploads%2F2018%2F01%2F25%2Fapdpadpppp.jpg&w=1200&q=75)
It isn’t clear if any damage was done during the earthquakes.
The quake also hit about 70 miles northwest of San Diego, with a population of 1.4 million.
It came after several major earthquakes struck along the Pacific “Ring of Fire” in recent months. The area is known for earthquakes and a number of active volcanoes.
![The Ring of Fire (Public Domain)](/_next/image?url=https%3A%2F%2Fimg.theepochtimes.com%2Fassets%2Fuploads%2F2017%2F09%2F20%2F1200px-Pacific_Ring_of_Fire.svg_.png&w=1200&q=75)
The “Ring of Fire” is located within the basin of the Pacific Ocean, lined with around 75 percent of the world’s total active volcanoes.
![The Ring of Fire, home to more than 450 active and dormant volcanoes. (U.S. Geological Survey)](/_next/image?url=https%3A%2F%2Fimg.theepochtimes.com%2Fassets%2Fuploads%2F2016%2F04%2F26%2Fimage-20160419-13895-34r4vi.jpg&w=1200&q=75)