Green earthquake (Magnitude 5.7M, Depth:259km) in Tonga 01/07/2026 21:13 UTC, 10 thousand in MMI>=II

Summary

Low-confidence signal — single-source GDACS detection with no corroborating news bundle. A magnitude 5.7 earthquake at a depth of 259 km was recorded in Tonga on 1 July 2026. The event’s deep hypocenter and moderate magnitude suggest limited surface shaking, with an estimated 10,000 people exposed to MMI II (weak) intensity. No immediate reports of damage or disruption are available.

Supply chain impact

• No commodities or chokepoints are directly mapped to this event; second-order effects depend on how the situation escalates. The deep depth and low surface intensity make significant infrastructure damage unlikely, but the lack of ground-truth reporting means localised disruptions cannot be ruled out.

Watch points

• Aftershock activity or shallower seismic events in the Tonga region that could pose a greater risk to logistics infrastructure.
• Any delayed reports of damage to port facilities or transport networks on Tongatapu or nearby islands, which would be critical for regional supply chain continuity.