"All the hotel guests were running, so I did too. People filled the streets," Michelle Lindsay, an Australian tourist, said. "A lot of officials were urging people not to panic."
Helicopters search Mount Rinjani to find the climbers.
Volcano in Indonesia continues to erupt after laying dormant for hundreds of years.
Three earthquakes rocked California on Thursday.
The quake was the second recorded in New Caledonia in 12 hours and the third in a month.
Preliminary results from a drilling expedition are beginning to reveal secrets of the world's "newest" continent.