M 5.7 Earthquake 153 km SW of Hihifo, Tonga
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A magnitude 5.7 earthquake occurred 153 km southwest of Hihifo, Tonga, at a depth of 265.9 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on August 2, 2026 and geographically references Tonga. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Tonga.
What Happened
A M 5.7 mww earthquake struck 153 km SW of Hihifo, Tonga, on 2026-07-02 at 03:53:41 UTC. The event was located at latitude -16.8952, longitude -174.8465, with a depth of 265.922 km. This depth classifies as deep (>70 km).
Location Details
The earthquake was centered 153 km southwest of Hihifo, Tonga, at coordinates -16.8952°S, -174.8465°E. The significant depth indicates the event occurred well below the surface.
Impact Assessment
The USGS assigned a green alert level. No tsunami advisory was issued (tsunami flag: 0). No felt reports were recorded in the available data.
What You Should Know
Earthquakes of this magnitude are classified as moderate. Deep events like this are typically felt over a wide area but cause limited surface damage.
Source
Data from USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000t9hu
Original source: USGS Official Notice ↗
Related Earthquakes
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Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (864 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to August 2, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.