In September 2025, the Fiji Seismology Unit reported a total of 182 earthquakes across the region, with magnitudes ranging from 1.1 to 5.5. The Seismology September 2025 Earthquake Summary indicated that two of these tremors were particularly significant and felt by residents.
The first notable earthquake occurred on September 13, measuring 4.7 in magnitude. It impacted the Yasawa Islands as well as areas within the Western Division, including Lautoka and Nadi. A second tremor, which registered at 4.3, was felt on September 23 in parts of Vanua Levu, particularly in Lekutu, Bua.
Shallow earthquake activity was primarily concentrated in the northern region of Fiji, extending from the northern Yasawas to Cikobia Island along the Fiji Fracture Zone. This pattern is consistent with established seismic behavior in the region. In addition, deeper seismic events were recorded east of Fiji under the Lau Basin, occurring at depths between 300 to 600 kilometers. These deeper events are associated with subduction processes, where the Pacific Plate slides beneath the Indo-Australian Plate.
Minor shallow seismic activity was also noted around Kadavu Island, Southeast Viti Levu, and Savusavu Bay in Vanua Levu, which contributed to the heightened earthquake activity observed this month. Fiji’s geographic location within the Pacific Ring of Fire makes it susceptible to such natural events.
The ongoing seismic activity serves as a crucial reminder of the geological forces at work in Fiji and underscores the need for residents to remain prepared. Similar to trends noted in previous months, community awareness and readiness are essential for effectively managing risks associated with living in an active seismic zone. Local authorities are actively promoting educational initiatives on earthquake safety to enhance resilience and preparedness among residents. As communities work to navigate these natural challenges, proactive measures provide hope and confidence for a safer future in the face of seismic activity.