(CNN) -- A pair of earthquakes within 10 minutes of each other rattled Vanuatu in the southern Pacific Wednesday evening, the U.S. Geological Survey reported.
The first quake -- a strong magnitude 6.6 -- was about 72 miles west of Isangel. The second one -- eight minutes later -- was a smaller magnitude 5.5 quake.
There were no immediate reports of damage and no tsunami warnings were issued.
Five earthquakes of magnitude 5.0 or above have been recorded in the area with a 24-hour period.