Strong and shallow M6.1 earthquake hits Tonga

A magnitude 6.1 earthquake struck Tonga at a shallow depth of 36 kilometers, according to the US Geological Survey (USGS) and the European-Mediterranean Seismological Centre (EMSC). The quake occurred 94 kilometers north-northeast of Hihifo, Tonga, and was felt by an estimated 23,000 people experiencing light shaking, with around 189,000 others feeling weaker tremors. Despite the strength of the earthquake, authorities confirmed there is no tsunami threat and issued a Green alert indicating a low likelihood of casualties or significant economic damage. The affected region includes nearby population centers such as Apia in Samoa, located 246 kilometers away, and Pago Pago in American Samoa, 327 kilometers distant. The local infrastructure is a mix of vulnerable and resistant building types, with many structures made from informal materials like metal, timber, and galvanized iron, which are more susceptible to earthquake damage. However, the overall risk of severe impact remains low due to the moderate depth and location of the quake offshore. This seismic event is part of the broader tectonic activity in the Pacific "Ring of Fire," where the Pacific Plate interacts with surrounding plates, making Tonga and its neighboring islands prone to frequent earthquakes and volcanic activity. Monitoring agencies continue to assess the situation for any aftershocks or related hazards, emphasizing the importance of preparedness in this seismically active region. The earthquake underscores ongoing challenges in infrastructure resilience and disaster readiness for island communities vulnerable to natural hazards.