Posted by: cheryl searcy (csearcy@usgs.gov), Thu Jan 1, 2026 21:51 (2151 UTC)
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"Significant" located earthquakes for December 31, 2025: (picking by Scott Stihler)

Makushin: 6; Martin: 4; Great Sitkin: 2; Iliamna: 2; Korovin: 2; Cleveland: 1; Okmok: 1; Redoubt: 1; Spurr: 1; Tanaga: 1; Westdahl: 1

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Makushin (6 EQs):
1 EQ ~18 km ESE of the summit
ML -0.0; Z = 8.4 km

1 EQ ~20 km E of the summit
ML -0.3; Z = 7.3 km

1 EQ ~22 km S of the summit
ML -0.4; Z = 12.8 km

1 EQ ~19 km E of the summit
ML -0.5; Z = 7.4 km

1 EQ ~19 km E of the summit
ML -0.6; Z = 6.6 km

1 EQ ~18 km E of the summit
ML -0.6; Z = 9.0 km


Martin (4 EQs):
1 EQ ~2 km WSW of the summit
ML -0.0; Z = 1.1 km

1 EQ ~2 km ESE of the summit
ML -0.1; Z = 1.6 km

1 EQ ~3 km ENE of the summit
ML -0.3; Z = 5.9 km

1 EQ ~1 km N of the summit
ML -0.5; Z = 0.4 km


Great Sitkin (2 EQs):
1 EQ ~4 km NW of the summit
ML 0.9; Z = 4.0 km

1 EQ ~5 km WNW of the summit
ML 0.8; Z = 1.9 km


Iliamna (2 EQs):
1 EQ ~10 km ESE of the summit
ML -0.3; Z = 3.1 km

1 EQ ~1 km WSW of the summit
ML -0.7; Z = 6.9 km


Korovin (2 EQs):
1 low frequency EQ ~5 km NNW of the summit
ML 2.3; Z = 4.4 km

1 low frequency EQ ~3 km WNW of the summit
ML 1.1; Z = 2.0 km


Cleveland:
1 EQ ~7 km SE of the summit
ML 1.5; Z = 6.2 km


Okmok:
1 EQ ~9 km SW of the center of caldera
ML -0.2; Z = 7.6 km


Redoubt:
1 deep low frequency EQ ~1 km N of the summit
ML -0.1; Z = 29.8 km


Spurr:
1 EQ ~2 km N of the summit
ML -0.1; Z = 0.7 km


Tanaga:
1 EQ ~15 km S of the summit
ML 2.2; Z = 12.1 km


Westdahl:
1 EQ ~9 km NNE of the summit
ML 1.0; Z = 8.4 km

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