A 5.4-magnitude aftershock struck Searles Valley, California – the epicenter of Thursday’s powerful earthquake.
The tremor was reported on Friday at about 4.07am local time, according to the US Geological Survey (USGS).
The first earthquake, a magnitude-6.4, occurred on the morning of Independence Day and was felt from Las Vegas to San Diego, reported NBC Los Angeles.
Several aftershocks – as many as 220 – followed within five hours of the original quake, but this is the strongest one yet.
