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Tectonics and Ancient Civilizations
Geologic Hazards
Alaskan megathrust fault more active under Kodiak
The 1964 Alaska Earthquake was 9.2 in magnitude and caused dramatic destruction and dramatic examples of surface rupture, subsidence, and liquefaction. New paleoseismic evidence points to a previously unknown earthquake that happened on the same […]
Geologic Hazards
World’s Tallest Tsunami in Lituya Bay, Alaska – 1958
The Lituya Bay Tsunami hit the Gulf of Alaska more than 60 years ago. On July 9, 1958, an earthquake estimated at magnitude 7.7-8.3 triggered a massive landslide or rockslide here, estimated at 40 million […]
Project Related
Washington’s I-5 Bridge over Columbia River Needs Seismic Upgrade
The timber piles of the existing I-5 bridge over the Columbia River is vulnerable to liquefaction in the event of a major earthquake. And there is no shortage of potential sources for the shaking in […]