"We've made holes and poured concrete around some of the more unstable boulders," he says, squinting uphill in a strong late morning sun.
He's not so worried if a quake strikes during daylight.
"But if I get caught at night? How do I see a rock?"
___Associated Press writer Franklin Briceno contributed to this report. ___ Frank Bajak on Twitter: http://twitter.com/fbajak