SAN DIEGO -- A flank of Mount Soledad that collapsed in a catastrophic landslide three months ago shifted again Thursday, further damaging a home already rendered uninhabitable by last fall's disaster, authorities reported.

The new earth failure, which sent a section of slope roughly 10 feet downhill at about 3 p.m., did no harm to any previously unscathed houses in the upscale La Jolla neighborhood, Mayor Jerry Sanders said.

The San Diego Fire-Rescue Department received no calls from the public about the ground movement or any related injuries or property damage, SDFRD spokesman Maurice Luque said.

The shift occurred east of Soledad Mountain Road and uphill from Desert View Drive, where a swath of earth about 200 feet wide gave way Oct. 3. "So it's within the crater that's already there," the mayor said during an early evening briefing near the site of the slide.

City personnel will remain in the area overnight to monitor the situation, Sanders told reporters.

An attorney representing victims of the autumn landslide -- which left six homes uninhabitable and caused about $48 million in infrastructure damage -- told local media that Thursday afternoon's collapse occurred as city crews were clearing a section of road to allow residents of the stricken area to move some vehicles.

Recent rains may have been a factor in Thursday's slope failure, officials said.