Two earthquakes have struck in northern NSW, and have been felt in Tamworth, Gunnedah and Coonabarabran and in areas more than 100km away.
Geoscience Australia says a 4.2 magnitude quake struck at Lake Keepit, northeast of Gunnedah, at 9pm (AEST) with a depth of 17km.
A similar sized earthquake nearby struck about two minutes earlier.
Kevin McCue from the Australian Seismological Centre says these were the first earthquakes greater than magnitude 4 to strike inland northern NSW since December 1969, when a magnitude 5 quake struck near Coonabarabran.
He says it's unlikely the quakes caused structural damage to homes in major towns, but some may have cracked walls or chimneys.