Posted by: Matthew Haney (mhaney@usgs.gov), Tue Dec 9, 2025 23:56 (2356 UTC)
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"Significant" located earthquakes for December 6, 2025 (picking by Scott Stihler):
Iliamna: 15; Katmai: 6; Novarupta: 2; Redoubt: 2; Spurr: 2; Augustine: 1; Edgecumbe: 1; Martin: 1; Okmok: 1; Moffett: 1
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Iliamna (15 EQs):
1 EQ ~1 km S of the summit
ML 1.4; Z = 0.3 km
1 EQ ~9 km SW of the summit
ML -0.2; Z = 11.3 km
1 low frequency EQ ~2 km ENE of the summit
ML -0.3; Z = -2.6 km
1 EQ ~2 km SE of the summit
ML -0.3; Z = -0.6 km
1 EQ ~2 km N of the summit
ML -0.4; Z = 0.2 km
1 low frequency EQ ~2 km SSW of the summit
ML -0.5; Z = 6.4 km
1 low frequency EQ ~1 km NNE of the summit
ML -0.7; Z = 0.0 km
1 EQ ~4 km SSW of the summit
ML -0.7; Z = 2.5 km
1 EQ ~2 km SSW of the summit
ML -0.8; Z = -0.4 km
1 EQ ~3 km SSW of the summit
ML -0.8; Z = -0.2 km
1 EQ ~1 km N of the summit
ML -0.8; Z = 0.1 km
1 EQ ~5 km S of the summit
ML -0.8; Z = 2.9 km
1 EQ ~1 km NE of the summit
ML -0.9; Z = 3.6 km
1 EQ ~3 km ESE of the summit
ML -0.9; Z = -1.8 km
1 EQ ~3 km SE of the summit
ML -0.9; Z = -0.3 km
Katmai (6 EQs):
1 moderately deep low frequency EQ ~9 km SSE of the summit
ML 0.3; Z = 10.8 km
1 EQ ~3 km NNW of the summit
ML 0.2; Z = 4.1 km
1 EQ ~2 km NNW of the summit
ML -0.3; Z = 4.1 km
1 EQ ~0 km S of the summit
ML -0.4; Z = 3.3 km
1 EQ ~4 km W of the summit
ML -0.6; Z = 1.9 km
1 EQ ~3 km WNW of the summit
ML -0.8; Z = 3.3 km
Novarupta (2 EQs):
1 EQ ~0 km WSW of the 1912 dome
ML -0.2; Z = 4.5 km
1 low frequency EQ ~3 km NE of the 1912 dome
ML -0.4; Z = 6.6 km
Redoubt (2 EQs):
1 EQ ~3 km N of the summit
ML -0.3; Z = 0.5 km
1 EQ ~5 km NNE of the summit
ML -0.7; Z = 5.1 km
Spurr (2 EQs):
1 EQ ~14 km S of the summit
ML 1.0; Z = 7.1 km
1 EQ ~14 km S of the summit
ML -0.3; Z = 5.9 km
Augustine:
1 EQ ~1 km SSW of the summit
ML 0.4; Z = 0.3 km
Edgecumbe:
1 EQ ~3 km NNE of the summit
ML 0.6; Z = 7.7 km
Martin:
1 EQ ~3 km E of the summit
ML -0.0; Z = 3.5 km
Okmok:
1 EQ ~7 km WSW of the center of caldera
ML -0.2; Z = 3.2 km
Moffett:
1 EQ ~10 km SE of the summit
ML 1.3; Z = 0.9 km
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