Washington, United States – Earthquakes

This page summarizes earthquakes in Washington (United States). The most recently recorded event was a magnitude M1.6 earthquake near Cowlitz County on 2026-09-13 11:27:20 UTC. All event lists and map markers are limited to the last 30 days.

Seismic profile ↓
Earthquakes (last 30 days)
69
Max magnitude (last 30 days)
M3.9
Avg magnitude (last 30 days)
M1.33
Avg depth (last 30 days)
7 km

Seismic profile

Analysis period13 Sep 2025 – 13 Sep 2026Data as of: 13 Sep 2026 · 12:00 UTC
Minimum magnitude

What the data show

Washington · M ≥ 3.0

After source reconciliation, the catalogue contains 4 event entries of M3.0 or above for this area and period, spread over 4 days.

Catalogue entries413 Sep 2025 – 13 Sep 2026
Strongest recorded earthquakeM3.9Cowlitz County ↗
Depth · median17.8 km4 events with valid depth
Last 30 days1Previous 30 days: 1

These figures describe the stored catalogue. Recording, magnitude types and geographic attribution may vary by source and period; completeness has not been established.

13 Sep 2025 – 13 Sep 2026

Earthquakes by month

M ≥ 3.0

Each bar counts events within the selected period. Hatched months are only partially included.

View data table
MonthAnalysis periodCatalogue entries
September 2025 · Partial month13 Sep 2025 – 30 Sep 20250
October 202501 Oct 2025 – 31 Oct 20250
November 202501 Nov 2025 – 30 Nov 20250
December 202501 Dec 2025 – 31 Dec 20250
January 202601 Jan 2026 – 31 Jan 20260
February 202601 Feb 2026 – 28 Feb 20261
March 202601 Mar 2026 – 31 Mar 20260
April 202601 Apr 2026 – 30 Apr 20260
May 202601 May 2026 – 31 May 20260
June 202601 Jun 2026 – 30 Jun 20260
July 202601 Jul 2026 – 31 Jul 20261
August 202601 Aug 2026 – 31 Aug 20261
September 2026 · Partial month01 Sep 2026 – 13 Sep 20261

How strong were the earthquakes?

Catalogue entries · 4

M 3.0 – < 4.04
M 4.0 – < 5.00
M 5.0 – < 6.00
M ≥ 6.00

At what depth did they occur?

4 events with valid depth

0 – < 30 km4
30 – < 70 km0
70 – < 300 km0
300 – 750 km0

0 events without valid depth are excluded here.

Depth · median

Half of the available values lie on either side of the median; ties are possible.

Current period in context

Last 30 days1
Previous 30 days1
Median of the eleven previous 30-day periods0

Same magnitude threshold, separate periods. Differences may also reflect changes in recording. No hazard level or forecast is inferred.

Where were earthquakes recorded?

Events assigned to Washington in the stored location data are analysed. This is not a radius search. Missing or different attributions are excluded.

The interactive map complements the event links on this page.

Marker size and colour indicate magnitude.

Strongest recorded earthquake

13 Sep 2025 – 13 Sep 2026 · M ≥ 3.0

Data and methodology

Analysis period: 13 Sep 2025 12:00 – 13 Sep 2026 12:00 UTC

Data and methodology

Reports are first reconciled using existing event associations. Additional reports from different sources are consolidated only when every pair is within 5 seconds, 10 km and 0.5 magnitude units, source groups do not overlap and exactly one group matches. Ambiguous cases remain separate. The preferred report determines magnitude, time and area; period and magnitude filters are applied afterwards. The start is included and the end excluded (UTC).

0 additional source reports were consolidated during source reconciliation.

Events assigned to Washington in the stored location data are analysed. This is not a radius search. Missing or different attributions are excluded.

These figures describe the stored catalogue. Recording, magnitude types and geographic attribution may vary by source and period; completeness has not been established.

Source reports used

The preferred report of each group is counted. Source priority follows the earthquake list. Different magnitude types and recording gaps limit comparability.

  • USGS3
  • EMSC1

The profile is recalculated hourly from the earthquake catalogue. Later source revisions may also change historical values.

Data as of: 13 Sep 2026 · 12:32 UTC

Map (last 30 days)

< 2 2–4 4–5 ≥ 5

About Washington

Washington is a state in the Pacific Northwest region of the United States. It is often referred to as Washington state to distinguish it from the national capital; both are named after George Washington, a U.S. Founding Father and the first U.S. president.

Seismic activity in 2026

In 2026, Washington recorded 381 earthquakes within United States. The average magnitude was M1.43. The strongest event reached M3.9.

By event count in 2026, this region ranks #8 within United States.

Located on the North America Plate.

Earthquakes in Washington (last 30 days)

M1.6
Cowlitz County
2026-09-13 · 11:27 UTC · 17 km
›
M1.4
Cowlitz County
2026-09-12 · 22:07 UTC · 17 km
›
M1.6
Pierce County
2026-09-12 · 20:52 UTC · 7 km
›
M2.6
Mount Vernon
2026-09-12 · 04:17 UTC · 13 km
›
M-0.1
Skamania County
2026-09-11 · 02:14 UTC · 6 km
›
M0.4
Skamania County
2026-09-11 · 02:13 UTC · 8 km
›
M2.1
Pullman
2026-09-10 · 19:55 UTC · 2 km
›
M1.7
Mayfield
2026-09-10 · 19:30 UTC · -1 km
›
M0.6
Cowlitz County
2026-09-10 · 19:21 UTC · 17 km
›
M0.4
Cowlitz County
2026-09-10 · 18:27 UTC · 17 km
›
M1.4
Yakima County
2026-09-10 · 16:57 UTC · 9 km
›
M1.3
New Kamilche
2026-09-10 · 16:30 UTC · 0 km
›
M1.8
King County
2026-09-10 · 08:46 UTC · 10 km
›
M-0.4
Pierce County
2026-09-09 · 21:51 UTC · 2 km
›
M0.1
Pierce County
2026-09-09 · 16:35 UTC · 9 km
›
M1.8
Ocean City
2026-09-09 · 16:13 UTC · 8 km
›
M0.4
Pierce County
2026-09-09 · 01:32 UTC · 7 km
›
M0.6
Cowlitz County
2026-09-08 · 19:05 UTC · 17 km
›
M1.1
Snohomish County
2026-09-08 · 19:00 UTC · 10 km
›
M1.5
Adams County
2026-09-08 · 16:37 UTC · 6 km
›
M1.6
Lewis County
2026-09-08 · 13:49 UTC · 4 km
›
M-0.4
Pierce County
2026-09-07 · 02:25 UTC · 9 km
›
M3.9
Cowlitz County
2026-09-05 · 11:09 UTC · 9 km
›
M1.8
Kapowsin
2026-09-04 · 22:08 UTC · 0 km
›
M0.0
Pierce County
2026-09-04 · 18:59 UTC · 8 km
›
M0.3
Skamania County
2026-09-04 · 16:02 UTC · 5 km
›
M1.2
Snohomish County
2026-09-04 · 13:31 UTC · 0 km
›
M2.4
Snohomish County
2026-09-04 · 13:31 UTC · 1 km
›
M2.4
Tokul
2026-09-03 · 03:59 UTC · 17 km
›
M0.1
Pierce County
2026-09-02 · 18:53 UTC · 1 km
›
M1.0
Skamania County
2026-08-31 · 21:22 UTC · 3 km
›
M1.6
Lewis County
2026-08-30 · 00:03 UTC · 2 km
›
M1.7
Sunset Farm
2026-08-29 · 22:27 UTC · 52 km
›
M1.5
Shadow Lake
2026-08-29 · 16:09 UTC · 1 km
›
M1.9
Lincoln County
2026-08-28 · 21:16 UTC · -1 km
›
M-0.3
Pierce County
2026-08-27 · 19:47 UTC · 8 km
›
M1.9
Jefferson County
2026-08-27 · 07:15 UTC · 22 km
›
M1.6
Mima
2026-08-26 · 17:17 UTC · 6 km
›
M1.0
Pierce County
2026-08-25 · 22:35 UTC · -3 km
›
M1.7
Badger Canyon
2026-08-25 · 21:46 UTC · 0 km
›
M2.6
Douglas County
2026-08-25 · 06:05 UTC · 5 km
›
M1.1
Skamania County
2026-08-23 · 18:29 UTC · 8 km
›
M0.8
Snohomish County
2026-08-23 · 15:31 UTC · 12 km
›
M1.7
Cowlitz County
2026-08-23 · 07:10 UTC · 7 km
›
M0.4
Pierce County
2026-08-22 · 22:38 UTC · 0 km
›
M0.1
Skamania County
2026-08-22 · 18:15 UTC · 7 km
›
M1.1
Skamania County
2026-08-22 · 16:16 UTC · 9 km
›
M1.7
Pierce County
2026-08-22 · 14:12 UTC · -1 km
›
M2.5
Pierce County
2026-08-22 · 10:54 UTC · -1 km
›
M0.9
Pierce County
2026-08-22 · 10:21 UTC · -1 km
›
M0.4
Pierce County
2026-08-21 · 19:36 UTC · 8 km
›
M0.9
Pierce County
2026-08-21 · 14:17 UTC · 1 km
›
M1.8
Snohomish County
2026-08-21 · 05:36 UTC · 0 km
›
M0.5
Skamania County
2026-08-20 · 19:36 UTC · 4 km
›
M0.9
Grays Harbor County
2026-08-20 · 18:06 UTC · 12 km
›
M1.8
Chelan County
2026-08-20 · 15:10 UTC · -1 km
›
M0.4
Lewis County
2026-08-20 · 14:04 UTC · 1 km
›
M1.6
Lewis County
2026-08-20 · 03:52 UTC · 22 km
›
M1.7
Snohomish County
2026-08-19 · 03:38 UTC · 15 km
›
M0.9
Skamania County
2026-08-18 · 20:38 UTC · 12 km
›
M1.7
Skagit County
2026-08-18 · 12:01 UTC · 0 km
›
M1.5
Canyon Creek
2026-08-17 · 19:54 UTC · 0 km
›
M0.2
Skamania County
2026-08-17 · 19:54 UTC · -1 km
›
M1.7
Cowlitz County
2026-08-17 · 19:13 UTC · 1 km
›
M1.1
Lyman
2026-08-17 · 12:10 UTC · 0 km
›
M0.3
Skamania County
2026-08-14 · 20:34 UTC · 1 km
›
M-0.3
Pierce County
2026-08-14 · 17:38 UTC · 6 km
›
M1.2
Four Lakes
2026-08-14 · 16:00 UTC · -1 km
›
M1.6
Sammamish
2026-08-14 · 12:58 UTC · 3 km
›