Posted by: cheryl searcy (csearcy@usgs.gov), Fri Dec 26, 2025 18:29 (1829 UTC)
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"Significant" located earthquakes for December 21, 2025: (picking by Cheryl Searcy)

Note: Data from much of Dec. 21, 2025 are missing. These events represent only the data that were available.

Spurr: 2; Redoubt: 1; Fourpeaked: 1

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Spurr (2 EQs):
1 EQ ~18 km SSW of the summit
ML 0.0; Z = 4.5 km

1 low frequency EQ ~4 km N of the summit
ML -0.3; Z = 2.4 km


Redoubt:
1 deep low frequency EQ ~11 km S of the summit
ML -0.5; Z = 37.9 km


Fourpeaked:
1 EQ ~9 km NNW of the summit
ML 1.6; Z = 6.1 km

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