Coinbase experienced a significant service outage on May 8 due to a failure in the AWS US-EAST-1 region, specifically affecting the use1-az4 availability zone. The disruption, which began around 8:00 AM Beijing time, led to high error rates across multiple services, impacting core trading operations. Although Coinbase's system is designed for single-zone failover, the multi-zone nature of this incident caused extended downtime. The primary issues have now been resolved, and Coinbase plans to conduct a thorough analysis, with further updates expected following AWS's official post-mortem report.