Washington earthquakes

M1.7 earthquake 3 km S of Maple Falls, Washington

A magnitude 1.7 earthquake struck 3 km S of Maple Falls, Washington on Sat, Sep 7, 1991, 8:35 PM PDT (03:35 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.0 6 km NW of Orcas, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-09-08 03:35:08 UTC
Depth
16.1 km (10.0 mi), shallow
Epicenter
48.892° N, 122.082° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 2.1 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
137°
Stations used
18

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.06 km ESE of Alger, Washington · 12807 days ago · 8 km deep · 35 km away
  2. 2.618 km SSE of Marblemount, Washington · 12805 days ago · 9 km deep · 79 km away
  3. 2.36 km NW of Orcas, Washington · 12801 days ago · 18 km deep · 73 km away
  4. 3.06 km NW of Orcas, Washington · 12801 days ago · 19 km deep · 73 km away
  5. 2.04 km NE of Bryant, Washington · 12795 days ago · 11 km deep · 69 km away
  6. 1.63 km E of Deming, Washington · 12774 days ago · 1 km deep · 10 km away
  7. 1.59 km NNW of Ault Field, Washington · 12769 days ago · 50 km deep · 70 km away
  8. 2.010 km E of Mission, Canada · 12755 days ago · 4 km deep · 28 km away
  9. 1.92 km NE of Deming, Washington · 12752 days ago · -1 km deep · 10 km away
  10. 1.82 km N of Big Lake, Washington · 12751 days ago · -1 km deep · 53 km away

Before

  1. 1.724 km NNE of Concrete, Washington · 12818 days ago · -1 km deep · 37 km away
  2. 2.25 km ESE of Alger, Washington · 12821 days ago · 2 km deep · 36 km away
  3. 1.98 km SSE of Coupeville, Washington · 12822 days ago · 20 km deep · 92 km away
  4. 2.04 km N of Friday Harbor, Washington · 12826 days ago · 54 km deep · 78 km away
  5. 1.52 km SSE of Orcas, Washington · 12827 days ago · 56 km deep · 71 km away
  6. 2.022 km E of Darrington, Washington · 12829 days ago · 0 km deep · 94 km away
  7. 2.021 km ESE of Darrington, Washington · 12830 days ago · 0 km deep · 94 km away
  8. 2.517 km S of Glacier, Washington · 12830 days ago · -1 km deep · 21 km away
  9. 1.55 km NE of Marrowstone, Washington · 12830 days ago · 26 km deep · 98 km away
  10. 1.56 km ESE of Alger, Washington · 12834 days ago · -1 km deep · 36 km away
  11. 2.07 km W of Aldergrove, Canada · 12835 days ago · 71 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10276198. Read Fri, Oct 2, 2026, 12:54 PM UTC.