Posted by: cheryl searcy (csearcy@usgs.gov), Thu Dec 11, 2025 20:34 (2034 UTC)
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"Significant" located earthquakes for December 7, 2025: (picking by Cheryl Searcy)

Spurr: 4; Iliamna: 2; Katmai: 2; Martin: 2; Okmok: 1; Semisopochnoi: 1

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Spurr (4 EQs):
1 EQ ~3 km NNE of the summit
ML 0.9; Z = -1.5 km

1 EQ ~3 km N of the summit
ML 0.7; Z = 0.5 km

1 EQ ~3 km NNE of the summit
ML 0.5; Z = 0.6 km

1 EQ ~4 km N of the summit
ML 0.1; Z = -2.5 km


Iliamna (2 EQs):
1 EQ ~6 km ENE of the summit
ML -0.2; Z = 6.4 km

1 EQ ~4 km NNE of the summit
ML -0.4; Z = 1.3 km


Katmai (2 EQs):
1 EQ ~8 km ENE of the summit
ML 1.5; Z = 4.9 km

1 EQ ~3 km SSW of the summit
ML -0.0; Z = 4.8 km


Martin (2 EQs):
1 EQ ~1 km WSW of the summit
ML -0.1; Z = 1.4 km

1 EQ ~1 km SW of the summit
ML -0.3; Z = 1.0 km


Okmok:
1 EQ ~4 km SE of the center of caldera
ML 0.6; Z = 3.8 km


Semisopochnoi:
1 moderately deep low frequency EQ ~17 km SW of the Mount Young
ML 2.1; Z = 11.9 km

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