Posted by: cheryl searcy (csearcy@usgs.gov), Fri Dec 19, 2025 18:53 (1853 UTC)
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"Significant" located earthquakes for December 18, 2025: (picking by Scott Stihler)
Spurr: 9; Gareloi: 4; Cleveland: 3; Great Sitkin: 2; Iliamna: 2; Katmai: 2; Martin: 2; Westdahl: 2; Makushin: 1; Okmok: 1; Redoubt: 1; Shishaldin: 1; Snowy: 1; Davidof: 1
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Spurr (9 EQs):
1 EQ ~16 km SSE of the summit
ML 1.2; Z = 6.3 km
1 EQ ~2 km N of the summit
ML 0.8; Z = -2.3 km
1 EQ ~4 km NNW of the summit
ML 0.3; Z = 1.2 km
1 EQ ~11 km S of the summit
ML -0.0; Z = 5.2 km
1 EQ ~4 km NNW of the summit
ML -0.0; Z = -0.4 km
1 EQ ~4 km NNW of the summit
ML -0.1; Z = 0.7 km
1 low frequency EQ ~2 km ESE of the summit
ML -0.2; Z = 9.5 km
1 low frequency EQ ~5 km NNE of the summit
ML -0.3; Z = -3.2 km
1 EQ ~3 km N of the summit
ML -0.5; Z = -0.3 km
Gareloi (4 EQs):
1 EQ ~25 km WSW of the summit
ML 1.2; Z = 8.8 km
1 EQ ~4 km S of the summit
ML 0.8; Z = 11.4 km
1 EQ ~8 km SSE of the summit
ML 0.8; Z = 16.1 km
1 EQ ~5 km W of the summit
ML 0.7; Z = 18.1 km
Cleveland (3 EQs):
1 EQ ~10 km E of the summit
ML 1.6; Z = 10.3 km
1 EQ ~10 km SSE of the summit
ML 1.1; Z = 8.1 km
1 EQ ~2 km SSE of the summit
ML 0.7; Z = 3.0 km
Great Sitkin (2 EQs):
1 low frequency EQ ~3 km SW of the summit
ML 0.3; Z = 5.0 km
1 EQ ~4 km WNW of the summit
ML 0.0; Z = 4.8 km
Iliamna (2 EQs):
1 low frequency EQ ~3 km ENE of the summit
ML -0.3; Z = 7.4 km
1 EQ ~3 km NNE of the summit
ML -0.8; Z = 1.9 km
Katmai (2 EQs):
1 EQ ~1 km SSE of the summit
ML 0.1; Z = 3.7 km
1 EQ ~4 km NW of the summit
ML -0.2; Z = 2.0 km
Martin (2 EQs):
1 EQ ~28 km SSW of the summit
ML 0.2; Z = 15.2 km
1 EQ ~2 km NE of the summit
ML -0.2; Z = 0.9 km
Westdahl (2 EQs):
1 EQ ~4 km NW of the summit
ML 0.5; Z = 1.8 km
1 EQ ~5 km W of the summit
ML 0.4; Z = 4.9 km
Makushin:
1 EQ ~20 km E of the summit
ML -0.2; Z = 7.4 km
Okmok:
1 EQ ~10 km S of the center of caldera
ML -0.1; Z = 25.4 km
Redoubt:
1 EQ ~8 km NNE of the summit
ML -0.3; Z = 6.0 km
Shishaldin:
1 low frequency EQ ~0 km WNW of the summit
ML 1.3; Z = -0.9 km
Snowy:
1 EQ ~17 km NNW of the summit
ML 0.0; Z = 8.3 km
Davidof:
1 EQ ~3 km E of the summit
ML 2.0; Z = 2.9 km
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