汤加Hihifo近海一天内接连发生6级以上地震，最大6.3级
2026年3月22日，南太平洋岛国汤加北部的 Hihifo 近海在一天内接连发生多次强震。美国地质调查局（USGS）事件目录（FDSN）定版记录显示，协调世界时22日6时15分，Hihifo 东北约121公里海域发生6.2级地震，震源深度约14公里；当日15时30分，Hihifo 东北偏东约140公里海域发生6.3级地震，震源深度约12公里，为当日最强；22时26分，同一海域再发生5.9级地震。
USGS 对这一系列地震均发布绿色警报，表示人员伤亡与经济损失的可能性低，目录中未见海啸警报标记。震中所在海域远离人口密集区，当日未报告人员伤亡或财产损失。
汤加位于环太平洋地震带上，海底地震频繁。两天后，汤加以西海域又发生7.5级深源地震，为2026年以来全球最强地震。
关联：汤加以西海域发生7.5级深源地震，为2026年以来全球最强地震
Series of Magnitude 6 Earthquakes Strike Off Hihifo, Tonga, in One Day, Largest at 6.3
On March 22, 2026, a series of strong earthquakes struck in one day off Hihifo in northern Tonga, in the South Pacific. The U.S. Geological Survey (USGS) FDSN event catalog records a magnitude 6.2 earthquake at 06:15 UTC about 121 km northeast of Hihifo at a depth of about 14 km; a magnitude 6.3 earthquake at 15:30 UTC about 140 km east-northeast of Hihifo at a depth of about 12 km, the day's strongest; and a magnitude 5.9 earthquake in the same waters at 22:26 UTC.
The USGS issued green alerts for the sequence, indicating a low likelihood of casualties and damage, and the catalog carries no tsunami flag for the events. The epicenters were far from population centers, and no casualties or property damage were reported that day.
Tonga sits on the Pacific Ring of Fire, where undersea earthquakes are frequent. Two days later, a magnitude 7.5 deep earthquake struck west of Tonga, the strongest worldwide so far in 2026.
Related: Magnitude 7.5 Deep Earthquake West of Tonga Is the Strongest Worldwide So Far in 2026
来源：美国地质调查局
发布：GSM·美国（发布链接）
图片来源：图：汤加北部 Niuatoputapu 岛（左）与 Tafahi 岛（右）的卫星图，Hihifo 位于 Niuatoputapu 岛上，本次地震序列的震中在其东北海域。NASA 国际空间站照片，公共领域，经 Wikimedia Commons。 / Photo: A satellite view of Niuatoputapu island (left) and Tafahi island (right) in northern Tonga; Hihifo is on Niuatoputapu, and this earthquake sequence was centered in the waters to its northeast. NASA International Space Station photo, public domain, via Wikimedia Commons.
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