Posted by: cheryl searcy (csearcy@usgs.gov), Thu Jan 22, 2026 16:39 (1639 UTC)
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"Significant" located earthquakes for January 20, 2026: (picking by Scott Stihler)

Iliamna: 8; Spurr: 4; Augustine: 2; Katmai: 2; Makushin: 2; Gareloi: 1; Great Sitkin: 1; Martin: 1; Novarupta: 1; Roundtop: 1

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Iliamna (8 EQs):
1 EQ ~1 km SSW of the summit
ML -0.1; Z = -1.1 km

1 EQ ~4 km NE of the summit
ML -0.2; Z = 2.7 km

1 EQ ~2 km NNE of the summit
ML -0.6; Z = 1.1 km

1 EQ ~2 km N of the summit
ML -0.7; Z = 0.8 km

1 EQ ~0 km NE of the summit
ML -0.8; Z = 2.0 km

1 low frequency EQ ~2 km SSW of the summit
ML -0.8; Z = 0.8 km

1 low frequency EQ ~4 km S of the summit
ML -1.0; Z = 1.3 km

1 EQ ~2 km SSW of the summit
ML -1.1; Z = 1.4 km


Spurr (4 EQs):
1 low frequency EQ ~9 km ENE of the summit
ML 0.2; Z = 1.6 km

1 EQ ~6 km WNW of the summit
ML 0.1; Z = 1.5 km

1 EQ ~5 km W of the summit
ML -0.1; Z = 3.5 km

1 deep low frequency EQ ~5 km SE of the summit
ML -0.4; Z = 21.1 km


Augustine (2 EQs):
1 EQ ~0 km ESE of the summit
ML 0.3; Z = -0.3 km

1 EQ ~0 km NE of the summit
ML -1.0; Z = -0.4 km


Katmai (2 EQs):
1 deep low frequency EQ ~8 km E of the summit
ML 0.5; Z = 32.0 km

1 EQ ~1 km ESE of the summit
ML -0.6; Z = 4.0 km


Makushin (2 EQs):
1 EQ ~21 km E of the summit
ML -0.1; Z = 7.3 km

1 EQ ~11 km ENE of the summit
ML -0.8; Z = 5.1 km


Gareloi:
1 EQ ~2 km SW of the summit
ML 0.9; Z = 11.1 km


Great Sitkin:
1 moderately deep low frequency EQ ~13 km W of the summit
ML 1.6; Z = 15.0 km


Martin:
1 EQ ~17 km WNW of the summit
ML -0.2; Z = 5.0 km


Novarupta:
1 EQ ~1 km S of the 1912 dome
ML 0.4; Z = 5.3 km


Roundtop:
1 EQ ~26 km SE of the summit
ML 2.3; Z = 7.3 km

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