(Changes dateline, adds information from Geoscience Australia) SYDNEY, March 25 (Reuters) - Two strong earthquakes struck on Sunday near Vanuatu in the South Pacific, Australia's geological agency reported, but there were no immediate reports of damage. The first quake, measured at magnitude 7.3 at 0040 GMT, occurred two minutes before a large quake jolted the western coast area of central Japan. Vanuatu's second quake, at magnitude 7.1, occurred 28 minutes later. "I wouldn't be expecting any damage," he said. "Earthquakes of this size only do damage 50 or 100 km (30 or 60 miles) away and there was no land (nearby), unlike the Japan one," said Mark Leonard, the duty seismologist at Geoscience Australia. No tsunami warning had been issued for Vanuatu and no damage had been reported, he said. "It's likely that it's caused a very small tsunami ... about 0.3 or 0.4 of a metre (12 or 16 inches) in that local area," he said. The quake occurred out at sea, within 200-300 km (125-190 miles) of Vanuatu's southern islands, he said. The U.S. Geological Survey said the first Vanuatu quake was centred 337 km (210 miles) south-south-east of the capital, Port Vila and 1,833 km (1,140 miles) east-north-east of the Australian city of Brisbane.
