Seattle Post-Intelligencer LogoHearst Newspapers Logo

19 years ago: Western Washington rocked by 6.8 Nisqually quake

By Natalie Guevara, SeattlePI

|Updated
As reported in this front-page graphic, more than 200 people were injured and the quake caused damage to major roadways, the Starbucks headquarters and the state Capitol.

As reported in this front-page graphic, more than 200 people were injured and the quake caused damage to major roadways, the Starbucks headquarters and the state Capitol.

University of Washington archives

Advertisement

Article continues below this ad

A magnitude 6.8 quake shook the Nisqually Delta, to the northwest of Olympia, for 40 seconds. In less than a minute, an estimated 200 people were injured. The quake was also cited as the cause for one man's fatal heart attack in Burien.

Damages topped $1 billion, with higher-end estimates as high as $3 billion, according to Seattle Post-Intelligencer reports from that day and History Link. The State Capitol in Olympia and several buildings in Seattle's Pioneer Square suffered. One of Sea-Tac International Airport's two runways cracked. Debris from buckling buildings smashed parked cars. The facade of the Starbucks headquarters in SoDo crumbled.

Remarkably, debris did not strike any pedestrians.

Advertisement

Article continues below this ad

The Alaskan Way Viaduct was damaged and eventually closed for inspection. The elevated highway needed to be reinforced and a stringent biannual inspection calendar was put in place.

Nineteen years later, the effects of the quake are still being felt by Seattle. The era of the Alaskan Way Viaduct has come to an end, in large part because of the seismic vulnerability it represents.

Advertisement

Article continues below this ad

This picture, taken south of Safeco Field, shows the damage from the 6.8 magnitude Nisqually earthquake on Feb. 28, 2001.
This picture, taken south of Safeco Field, shows the damage from the 6.8 magnitude Nisqually earthquake on Feb. 28, 2001.Don Marquis/<a href="http://www.mohai.org/">MOHAI</a> <a href="http://www.mohai.org/research/photo-archive-search">Seattle Post-Intelligencer Collection</a>/seattlepi.com file

When a 6.9 magnitude quake rocked the Bay Area of California in 1989, a 1.25-mile section of the elevated Nimitz Expressway collapsed on itself, killing 42 motorists driving along the lower level.

Images of this damage in Oakland struck a chord with engineers in Washington who thought about our viaduct and how well it would survive a major quake.

Our viaduct did survive the Nisqually quake -- though repairs were required to keep it safe for travelers. And it stuck around long enough for a new state Route 99 tunnel to be built and open, winning "the race against time," as Gov. Jay Inslee said at the tunnel's ribbon-cutting ceremony. A small bridge that serves as an off-ramp for northbound SR-99 travelers avoiding the tunnel was also the first in the world constructed with earthquake-resistant concrete.

Advertisement

Article continues below this ad

Western Washington residents have been told time and again the region is due for the so-called "Big One." The Nisqually quake was the last major earthquake to strike the area, which has researchers concerned. Since 2009, there have been just nine earthquakes at a magnitude 4 or greater, excluding those at Mount St. Helens or on the Cascadia Subduction Zone.

Though this quiet period doesn't necessarily mean a big earthquake is more or less likely to happen anytime soon. More research is needed, experts told Northwest Public Broadcasting last year.

As for what you can do right now, when the ground is still? Not much, really, but you can prepare for when the next one strikes.

Advertisement

Article continues below this ad


Producer Natalie Guevara can be contacted at natalie.guevara@seattlepi.com. Follow her on Twitter. Find more from Natalie on her author page.

Natalie Guevara is a homepage editor and producer for the SeattlePI.