2025-08-31T16:13:53.0000Z27.2889126.5233164.749manualconfirmedIRIS4.6mb1Origin/20250831171656.261551.421015Magnitude/20250831171656.261607.421016IRISNORTHWEST OF RYUKYU ISLANDSregion nameNEIC PDEcatalogus7000qsu4contributorID