The Fiji Seismology Unit has reported a significant seismic month, recording a total of 182 earthquakes across the Fiji region in September 2025. These earthquakes varied in magnitude, ranging from a low of 1.1 to a maximum of 5.5. Among these, two notable quakes were felt by the public. The first occurred on September 13, with a magnitude of 4.7, affecting the Yasawa Islands and parts of the Western Division, including Lautoka and Nadi. A second tremor, measuring 4.3 in magnitude, was recorded on September 23 and was felt in parts of Vanua Levu, particularly in Lekutu, Bua.
The Seismology Unit indicated that the northern region of Fiji, especially around Vanua Levu, experienced a pronounced concentration of shallow earthquake activity. This seismic activity extended from the northern Yasawas to Cikobia Island, consistent with seismic patterns expected for the Fiji Fracture Zone, a region well known for its geological activity. In addition to these shallow earthquakes, deep seismic events ranging from 300 to 600 kilometers in depth were detected east of Fiji, primarily beneath the Lau Basin. This deep activity is attributed to the ongoing subduction process caused by the Pacific Plate moving beneath the Indo-Australian Plate.
Other isolated areas reported minor shallow earthquakes, including Kadavu Island, Southeast Viti Levu, and Savusavu Bay in Vanua Levu.
The increased seismic activity aligns with trends noted in previous months, where notable rises in earthquake frequency have been observed. For instance, in February alone, there were 262 earthquakes reported, showing the region’s ongoing geological volatility. Local authorities emphasize the importance of preparedness among residents in light of these active seismic conditions. In line with safety measures, community education and awareness initiatives focus on earthquake safety, underscoring the resiliency of the population.
While some may find the increased frequency of tremors alarming, it’s imperative to understand that seismic activity is a normal aspect of life in Fiji. Such occurrences provide opportunities for communities to enhance their disaster preparedness strategies, fostering a culture of resilience and proactivity in the face of natural challenges.
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