Shaking intensity
- II
- III
Strongest contour: Weak (III). Modelled by USGS ShakeMap; contours show where shaking was expected to reach each level, not damage.
Who felt it
People in the shaking
- IIIWeak1.9 million
- IIWeak2.9 million
| Place | Population | Shaking |
|---|---|---|
| Longbranch | 4,000 | III |
| Home | 2,000 | III |
| Stansberry Lake | 2,000 | III |
| Herron Island | 101 | III |
| Skokomish | 593 | III |
| Key Center | 3,000 | III |
| Raft Island | 369 | III |
| Tumwater | 25,000 | III |
Past earthquakes here. A magnitude 6.5 earthquake 29 km n of this event struck Puget Sound, Washington on April 29, 1965 (UTC), with estimated population exposures of 1,587,000 at intensity VII and 131,000 at intensity VIII, resulting in a reported 7 fatalities.
Local buildings. Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.
Population and intensity modelled by USGS PAGER. Estimates, not a count of people affected.
Official source
View the USGS record ↗U.S. Geological Survey
Terremoto preserves this event snapshot for a stable public link. USGS remains the authoritative source for revisions and scientific details. Shaking contours and population estimates come from USGS ShakeMap and PAGER, which revise them as more data arrives.