Meteor hunters say they have found two more remnants in a Novato neighborhood of the streaking fireball that lit up California skies last month.
The latest find reported on Thursday brings the total number of chunks of rock that fell from the Oct. 17 meteor explosion to four.
The meteorites are known as metal chondrites because they contain microscopic metal particles called chondrules. The exploding streak was especially visible over the San Francisco Bay Area and other parts of Northern California, with reports of a bright fireball and loud boom from Santa Cruz County to Mendocino County.
Warm temperatures and cloud-free skies made the bright light more visible.
The first fragment of the meteorite was discovered in the Novato backyard of Lisa Webber, an administrative nurse at University of California at San Francisco.
A second suspected meteorite was then found 2.5 miles southeast of Webber's home by meteorite hunter Brien Cook, of Sacramento.
The rock was 65 grams and looked similar to the one found at Webber's home, which is 2 inches, weighs 63 grams. It was dense and responded to a magnet, according to information from the SETI Institute, a nonprofit scientific and education organization that has projects sponsored by NASA and other foundations and research groups.
Retired aerospace engineer Bob Verish, who has been hunting and identifying meteorites for 12 years, said Cook decided to cut the stone after first disregarding his find as a possible meteorite.
"As soon as he cut it he could see it was meteorite," Verish said. "It was only the exterior that was throwing people off."
The appearance of the exterior of the two meteorites apparently didn't look like known meteorite specimens.
"It's really remarkable how varied they are," Verish said, who has his own collection of meteorites through his Meteorite Recovery Lab based in Southern California.
NASA cameras for the Allsky Meteor Surveillance project, cameras in Sunnyvale and at San Mateo College all captured two views of the fireball. Scientists were able to calculate a trajectory from the images and projected a fall area in the North Bay, from east of San Rafael over to Novato and beyond toward Sonoma and Napa counties.
Watchdogs are questioning an exclusive agreement between the City of Oakland and a non-profit group, tapped to lead a multi-million dollar project to redevelop the area around the Coliseum BART station.