Sand volcano or "sand boil" measuring 2 meters (6.6 feet) in length. Loma Prieta, California. 1989.
Dates
Date Taken
1989-10-17
Summary
Sand volcano or "sand boil" measuring 2 meters (6.6 feet) in length erupted in the median of Interstate 80 west of the San Francisco-Oakland Bay Bridge toll plaza. Ground shaking transformed a loose water-saturated deposit of subsurface sand into a sand-water slurry (liquefaction). The vented sand contains marine shell fragments. Loma Prieta, California, Earthquake October 17, 1989. Slide II-3, U.S. Geological Survey Open-File Report 90-547.
Summary
Sand volcano or "sand boil" measuring 2 meters (6.6 feet) in length erupted in the median of Interstate 80 west of the San Francisco-Oakland Bay Bridge toll plaza. Ground shaking transformed a loose water-saturated deposit of subsurface sand into a sand-water slurry (liquefaction). The vented sand contains marine shell fragments. Loma Prieta, California, Earthquake October 17, 1989. Slide II-3, U.S. Geological Survey Open-File Report 90-547.
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