Thousands of panicked South Pacific islanders raced away from coastlines after a series of strong earthquakes rocked the region and generated a small tsunami today . There were no immediate reports of damage, and tsunami warnings for 11 nations.<br/><br/>But people across the South Pacific took no chances,scrambling up hillsides and maneuvering through traffic-clogged streets to reach higher ground. The Pacific Tsunami Warning Center issued a regional tsunami warning after a quake with a magnitude of 7.8 struck 294 kilometers northwest of the Vanuatu island of Santo at a depth of 35 kilometers.<br/><br/>Within an hour, two other temblors of<br/>magnitude 7.7 and 7.3 followed. A fourth quake of magnitude 7.0 was recorded by the US Geological Survey nearly 10 hours after the initial quake at a depth of 35 kilometers in the same ocean area northeast of Vanuatu.<br/>However, No tsunami alert was issued.<br/>There were no immediate reports of injury or damage from officials in Vanuatu, a chain of 83 islands about 2,200 kilometers northeast of Sydney, Australia. <br/>