Earthquake · Reviewed by USGS

M1.8 earthquake 20 km E of Castle Rock, Washington

A magnitude 1.8 earthquake struck 20 km E of Castle Rock, Washington at Oct 6, 2026, 19:59 UTC, at a depth of 17 km. The epicentre was 26 km (16 mi) ENE of Longview.

Details

Magnitude	1.8 ml
Time	Oct 6, 2026, 19:59 UTC
Depth	16.5 km
Coordinates	46.248, -122.644
Felt reports	0
Tsunami flag	None
Source	USGS event page

Fig. 1The epicentre and other earthquakes within 100 km, since the day before

01 — Nearby

Nearest cities

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
Magnitude	Location	Distance	Depth	Time
1.3	22 km ENE of Ashford, Washington	94 km / 59 mi	depth 0 km	Oct 25, 19:30 UTC
1.0	22 km ENE of Ashford, Washington	94 km / 59 mi	depth 0 km	Oct 25, 19:30 UTC
1.4	38 km NNE of Amboy, Washington	35 km / 22 mi	depth 7 km	Oct 24, 20:34 UTC
1.6	3 km W of Columbia City, Oregon	43 km / 27 mi	depth 23 km	Oct 23, 14:09 UTC
1.6	16 km NNE of Ashford, Washington	90 km / 56 mi	depth 10 km	Oct 22, 22:27 UTC
3.0	3 km W of Columbia City, Oregon	43 km / 27 mi	depth 24 km	Oct 22, 14:25 UTC
1.7	24 km S of Morton, Washington	33 km / 20 mi	depth 11 km	Oct 22, 10:34 UTC
1.4	1 km SE of Kapowsin, Washington	87 km / 54 mi	depth 0 km	Oct 20, 23:30 UTC
1.6	4 km E of Lewisville, Washington	50 km / 31 mi	depth -1 km	Oct 19, 23:25 UTC
1.6	8 km NE of Ashford, Washington	82 km / 51 mi	depth 7 km	Oct 18, 20:49 UTC
1.6	12 km WSW of Alder, Washington	58 km / 36 mi	depth 25 km	Oct 18, 16:34 UTC
1.1	12 km NE of Ashford, Washington	87 km / 54 mi	depth 4 km	Oct 18, 02:18 UTC
1.1	16 km NNE of Ashford, Washington	90 km / 56 mi	depth 10 km	Oct 17, 12:53 UTC
1.4	9 km ESE of McCleary, Washington	94 km / 58 mi	depth 0 km	Oct 16, 18:35 UTC
1.1	10 km SSE of Toledo, Washington	17 km / 10 mi	depth 0 km	Oct 15, 23:50 UTC
1.4	11 km NE of Vernonia, Oregon	49 km / 31 mi	depth 0 km	Oct 13, 19:26 UTC
1.2	3 km W of Venersborg, Washington	55 km / 34 mi	depth 13 km	Oct 12, 09:01 UTC
1.1	3 km NNE of Hockinson, Washington	55 km / 34 mi	depth 13 km	Oct 12, 03:01 UTC
1.3	13 km SE of Ashford, Washington	71 km / 44 mi	depth 6 km	Oct 11, 00:28 UTC
1.6	10 km S of Toledo, Washington	18 km / 11 mi	depth 0 km	Oct 8, 23:32 UTC
1.3	6 km NNW of Clatskanie, Oregon	46 km / 29 mi	depth 21 km	Oct 8, 13:34 UTC
1.1	4 km W of Yacolt, Washington	45 km / 28 mi	depth -1 km	Oct 7, 22:47 UTC
1.6	20 km E of Castle Rock, Washington	0 km / 0 mi	depth 17 km	Oct 7, 20:15 UTC
1.2	2 km SW of Ashford, Washington	71 km / 44 mi	depth 4 km	Oct 6, 15:25 UTC
2.4	2 km SW of Ashford, Washington	71 km / 44 mi	depth 8 km	Oct 6, 02:02 UTC

USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.