Salesforce.com is experiencing a significant outage today, leaving many customers unable to access the company’s services. The downtime was triggered by a power outage at an Equinix data center in Silicon Valley. The disruption began just before 1 a.m. Pacific time, and Salesforce.com has been gradually restoring service throughout the day. The incident has affected at least six of the company’s regions, including three production instances in North America and at least three “sandbox” instances used primarily for testing and development.