An earthquake with a preliminary magnitude of 3.47 shook San Francisco Bay Area residents awake on Friday morning, according to the U.S. Geological Survey. The earthquake struck at 7:02 a.m., just 3 miles northwest of the San Francisco Zoo. The shake had a depth of 5.21 miles and no injuries have been reported.

An earthquake with a 3.7 magnitude struck just off the coast of San Francisco, according to data from the U.S. Geological Survey.

A magnitude 3.0 earthquake struck in Monterey County on Wednesday night. The U.S. Geological Survey measured the temblor at 9:10 p.m. in the unincorporated community of Aromas. There have been no initial reports of damage.

Residents' access to medicine could soon be impacted as Walgreens announced it will be shuttering a dozen San Francisco locations by the end of February. Here's the list.

Walgreens announced it was closing a dozen stores in San Francisco because of what it called "increased regulatory and reimbursement pressures" in the latest round of retail store closures in the city.

Walgreens will reportedly close 12 stores in San Francisco next month. According to separate reports in the San Francisco Standard and the San Francisco Chronicle, the pharmacy chain will close the stores due to rising business costs.