Posted by: cheryl searcy (csearcy@usgs.gov), Tue Dec 30, 2025 00:05 (0005 UTC)
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"Significant" located earthquakes for December 26, 2025: (picking by Cheryl Searcy)
Iliamna: 12; Katmai: 8; Makushin: 7; Novarupta: 3; Okmok: 3; Griggs: 1; Martin: 1; Spurr: 1; Trident: 1; Steller: 1
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Iliamna (12 EQs):
1 EQ ~18 km NNW of the summit
ML 0.4; Z = 6.2 km
1 low frequency EQ ~6 km NNW of the summit
ML -0.0; Z = 8.6 km
1 low frequency EQ ~2 km SE of the summit
ML -0.1; Z = 0.6 km
1 EQ ~0 km S of the summit
ML -0.1; Z = -1.9 km
1 moderately deep low frequency EQ ~8 km WSW of the summit
ML -0.2; Z = 12.5 km
1 EQ ~2 km NE of the summit
ML -0.6; Z = 1.2 km
1 EQ ~2 km NNE of the summit
ML -0.7; Z = -1.1 km
1 low frequency EQ ~2 km NNE of the summit
ML -0.8; Z = 0.8 km
1 low frequency EQ ~4 km SSW of the summit
ML -0.8; Z = 1.4 km
1 EQ ~7 km E of the summit
ML -1.0; Z = 3.9 km
1 low frequency EQ ~3 km NNE of the summit
ML -1.1; Z = 0.9 km
1 low frequency EQ ~2 km NNE of the summit
ML -1.1; Z = -2.3 km
Katmai (8 EQs):
1 EQ ~7 km ENE of the summit
ML 1.4; Z = 5.5 km
1 EQ ~2 km NW of the summit
ML 0.9; Z = 2.6 km
1 EQ ~2 km NW of the summit
ML 0.6; Z = 3.5 km
1 EQ ~8 km ENE of the summit
ML 0.3; Z = 4.4 km
1 EQ ~6 km NE of the summit
ML 0.2; Z = 3.6 km
1 EQ ~8 km ENE of the summit
ML 0.1; Z = 4.8 km
1 EQ ~2 km NW of the summit
ML -0.2; Z = 1.9 km
1 EQ ~3 km NW of the summit
ML -0.3; Z = 3.0 km
Makushin (7 EQs):
1 EQ ~20 km E of the summit
ML 1.4; Z = 8.6 km
1 EQ ~20 km E of the summit
ML 0.8; Z = 7.3 km
1 EQ ~26 km ENE of the summit
ML 0.7; Z = 9.8 km
1 EQ ~20 km E of the summit
ML 0.5; Z = 8.5 km
1 EQ ~20 km E of the summit
ML 0.2; Z = 7.6 km
1 EQ ~20 km E of the summit
ML 0.2; Z = 7.3 km
1 EQ ~18 km E of the summit
ML 0.1; Z = 7.3 km
Novarupta (3 EQs):
1 EQ ~4 km ENE of the 1912 dome
ML 0.3; Z = 4.0 km
1 EQ ~3 km SSW of the 1912 dome
ML -0.2; Z = 3.3 km
1 EQ ~3 km NE of the 1912 dome
ML -0.6; Z = 4.6 km
Okmok (3 EQs):
1 EQ ~2 km SE of the center of caldera
ML 0.5; Z = 3.0 km
1 EQ ~4 km SE of the center of caldera
ML 0.4; Z = 2.9 km
1 EQ ~4 km WNW of the center of caldera
ML 0.3; Z = 3.0 km
Griggs:
1 moderately deep low frequency EQ ~5 km SSE of the summit
ML 0.2; Z = 15.1 km
Martin:
1 EQ ~1 km SW of the summit
ML -0.5; Z = 1.7 km
Spurr:
1 EQ ~17 km W of the summit
ML 0.5; Z = 3.5 km
Trident:
1 EQ ~0 km N of the summit
ML -0.3; Z = 4.1 km
Steller:
1 EQ ~9 km WSW of the summit
ML 0.4; Z = 3.8 km
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