A strong and shallow earthquake registered by the USGS as M6.1 hit the Volcano Islands, Japan region at 16:37 UTC on January 21, 2026. The agency is reporting a depth of 25.5 km (15.8 miles). EMSC is reporting the same magnitude and depth.
The epicenter was located 937 km (582 miles) NNW of Saipan (population 48 220), 957 km (595 miles) NNW of San Jose Village, Tinian (population 15 000), and about 1 090 km (678 miles) NNW of Guam (population centers Yigo and Dededo).
The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are heavy wood frame and reinforced/confined masonry construction.
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