Posted by: Matthew Haney (mhaney@usgs.gov), Wed Dec 10, 2025 03:15 (0315 UTC)
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"Significant" located earthquakes for December 8, 2025 (picking by Scott Stihler):

Katmai: 4; Shishaldin: 3; Iliamna: 2; Semisopochnoi: 2; Spurr: 2; Edgecumbe: 1; Makushin: 1; Trident: 1

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Katmai (4 EQs):
1 EQ ~2 km E of the summit
ML 0.1; Z = 5.0 km

1 EQ ~2 km E of the summit
ML -0.0; Z = 5.4 km

1 EQ ~2 km ESE of the summit
ML -0.1; Z = 6.4 km

1 EQ ~2 km E of the summit
ML -0.5; Z = 6.2 km


Shishaldin (3 EQs):
1 low frequency EQ ~2 km NE of the summit
ML 1.2; Z = 9.2 km

1 low frequency EQ ~1 km W of the summit
ML 1.1; Z = 0.4 km

1 EQ ~0 km NW of the summit
ML 0.7; Z = -1.1 km


Iliamna (2 EQs):
1 low frequency EQ ~6 km NW of the summit
ML -0.4; Z = 9.4 km

1 low frequency EQ ~1 km NNE of the summit
ML -1.2; Z = -0.4 km


Semisopochnoi (2 EQs):
1 low frequency EQ ~8 km ESE of Mount Young
ML 2.1; Z = 3.9 km

1 low frequency EQ ~4 km SW of Mount Young
ML 1.8; Z = 3.5 km


Spurr (2 EQs):
1 EQ ~17 km S of the summit
ML -0.2; Z = 5.7 km

1 EQ ~18 km S of the summit
ML -0.3; Z = 5.8 km


Edgecumbe:
1 EQ ~5 km E of the summit
ML 0.5; Z = 7.4 km


Makushin:
1 EQ ~10 km ESE of the summit
ML 0.1; Z = 3.5 km


Trident:
1 low frequency EQ ~5 km E of the summit
ML 0.1; Z = 8.5 km

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