Thee tremor occurred at 12:37:29 UTC on 20 June, registering a magnitude of 5.12 on the Richter scale at a depth of 24.8 kilometres.
NRIAG said the earthquake was monitored by its seismic network, noting that the epicentre was located approximately 611 kilometres from Marsa Matrouh.
The institute confirmed that no reports had been received of the quake being felt inside Egypt, and no losses in lives or property were recorded.
It added that monitoring operations continue around the clock through its seismic stations to track regional seismic activity.
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