M1.6 earthquake 31 km NNW of Chilliwack, Canada
A magnitude 1.6 earthquake struck 31 km NNW of Chilliwack, Canada on Sat, Aug 22, 1987, 2:02 PM PDT (21:02 UTC), -1 km (0 mi) below the surface.
A larger quake followed: M2.0 2 km WSW of Birch Bay, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (md), micro
- Local time
- UTC
- 1987-08-22 21:02:15 UTC
- Depth
- -0.7 km (-0.4 mi), shallow
- Epicenter
- 49.425° N, 122.143° W
- Region
- Canada
- 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 2.9 km horizontally, 5.2 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- Operator assigned
- Station coverage gap
- 298°, poorly surrounded by stations
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.02 km WSW of Birch Bay, Washington · 14270 days ago · 15 km deep · 73 km away
- 1.816 km SE of Glacier, Washington · 14254 days ago · 25 km deep · 76 km away
- 3.04 km WSW of Langley, Canada · 14251 days ago · 1 km deep · 56 km away
- 2.34 km WSW of Langley, Canada · 14249 days ago · 4 km deep · 56 km away
Before
- 1.72 km SSW of Birch Bay, Washington · 14277 days ago · 13 km deep · 74 km away
- 1.76 km SSW of Geneva, Washington · 14290 days ago · 12 km deep · 84 km away
- 1.55 km SSW of Geneva, Washington · 14291 days ago · 12 km deep · 83 km away
- 2.06 km SW of Geneva, Washington · 14292 days ago · 12 km deep · 84 km away
- 1.74 km E of Maple Falls, Washington · 14302 days ago · 0 km deep · 56 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10224713. Read Tue, Sep 22, 2026, 3:46 PM UTC.