Coinbase said major service issues tied to an Amazon Web Services outage in the us-east-1 environment were fully resolved, with trading restored across all markets and customer assets remaining safe. Coinbase CEO Brian Armstrong later said the disruption was caused by multiple AWS data center cooler failures. He said Coinbase systems handled a single availability zone failure, but the exchange’s centralized architecture, optimized for low latency and customer colocation rather than full availability-zone redundancy, could not avoid downtime. Some transfers, including SOL, continued to face delays after trading resumed, and Coinbase plans to reassess these infrastructure trade-offs and publish a technical explanation later.