Significant earthquakes rocked the Big Island of Hawaii on Friday as the Kilauea volcano continues to erupt.

The U.S. Geological Survey (USGS) said a 6.9-magnitude earthquake hit the island, as well as a 5.4-magnitude quake.

The 5.4-magnitude quake reportedly was felt as far away as Oahu. The Pacific Tsunami Warning Center said the second quake wasn't strong enough to cause a tsunami, and Hawaii's Department of Transportation said no damage had been reported to roads.

After the 6.9-magnitude quake, the Pacific Tsunami Warning Center said the quake generated small sea level changes at some locations on the Big Island, but not tsunami was expected.

Kilauea, after a week of earthquakes and warnings, began erupting Thursday and sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, according to reports from CBS News.

Officials warned that high levels of sulfur gas that could threaten the elderly and people with breathing problems. There were no immediate reports of injuries, but at least two homes were damaged by the eruptions.

The community of Leilani Estates, near the town of Pahoa, is reported to be closest to the danger; the 6.9 magnitude quake, the USGS said, was centered just about 4 miles southwest of Leilani Estates.

The USGS said Friday that since late afternoon Thursday, May 3, at least three small fissure vents have opened in the Leilani Estates. "At this time, activity consists mostly of vigorous lava spattering. Additional outbreaks in the area are likely." 

See the gallery: The World's Deadliest Volcanoes