Posted by: cheryl searcy (csearcy@usgs.gov), Tue Dec 30, 2025 20:50 (2050 UTC)
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"Significant" located earthquakes for December 28, 2025: (picking by Cheryl Searcy)

Iliamna: 7; Spurr: 4; Katmai: 3; Fourpeaked: 2; Mageik: 1; Makushin: 1; Martin: 1; Ugashik-Peulik: 1

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Iliamna (7 EQs):
1 EQ ~9 km NE of the summit
ML 0.2; Z = 14.1 km

1 EQ ~11 km NE of the summit
ML 0.1; Z = 3.7 km

1 low frequency EQ ~8 km ENE of the summit
ML 0.0; Z = 0.7 km

1 moderately deep low frequency EQ ~5 km S of the summit
ML -0.3; Z = 19.8 km

1 low frequency EQ ~2 km E of the summit
ML -0.4; Z = -2.5 km

1 low frequency EQ ~4 km N of the summit
ML -0.4; Z = 2.0 km

1 low frequency EQ ~3 km SSE of the summit
ML -0.8; Z = 0.7 km


Spurr (4 EQs):
1 EQ ~24 km S of the summit
ML 1.1; Z = 3.3 km

1 EQ ~8 km S of the summit
ML 0.0; Z = 5.2 km

1 EQ ~16 km S of the summit
ML -0.4; Z = 5.3 km

1 EQ ~14 km S of the summit
ML -1.0; Z = 5.6 km


Katmai (3 EQs):
1 EQ ~2 km W of the summit
ML 0.2; Z = 2.8 km

1 EQ ~11 km NNE of the summit
ML 0.2; Z = 4.9 km

1 EQ ~3 km W of the summit
ML -0.3; Z = 3.0 km


Fourpeaked (2 EQs):
1 EQ ~8 km SW of the summit
ML 0.8; Z = 4.6 km

1 EQ ~26 km WNW of the summit
ML 0.6; Z = 3.3 km


Mageik:
1 EQ ~8 km SE of the summit
ML -0.4; Z = 4.0 km


Makushin:
1 EQ ~20 km E of the summit
ML 0.8; Z = 7.6 km


Martin:
1 EQ ~15 km NW of the summit
ML 0.3; Z = 3.9 km


Ugashik-Peulik:
1 EQ ~24 km S of the summit
ML 1.7; Z = 7.6 km

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