Herming said the Solomon Islands, which is home to about 700,000 people, doesn't have any big high-rises that might be vulnerable to a quake. He said there was some panic around the town and traffic jams as everybody tried to drive to higher ground.
Australian Prime Minister Anthony Albanese said all the staff of Australia's High Commission were safe.
“There are no known injuries but the roof of the High Commission annex has collapsed, which would point to likely damage throughout the city,” Albanese told Parliament.
“Staff have been moved to higher ground because there was a tsunami warning that was issued. Our High Commission is seeking to confirm the safety of all Australians in the Solomons. There are difficulties because phone lines have gone down. So there are communication difficulties there,” Albanese added.
Freelance journalist Charley Piringi said he was standing outside near schools on the outskirts of Honiara when the quake sent the children running.
“The earthquake rocked the place,” he said. “It was a huge one. We were all shocked, and everyone is running everywhere.”
The quake's epicenter was in the ocean about 56 kilometers (35 miles) southwest of Honiara at a depth of 13 kilometers (8 miles), according to the U.S. Geological Survey.
The Pacific Tsunami Warning Center initially warned of possible hazardous waves for the region but later downgraded a tsunami warning as the threat passed.
The Solomon Islands sits on the Pacific Ring of Fire, a arc along the Pacific Ocean rim where many volcanic eruptions and earthquakes occur.
Associated Press reporter Rod McGuirk in Canberra, Australia, contributed to this report.