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Collection: Directories and Documents > Pamphlets

Effects of the Truckee, California Earthquake of September 12, 1966 (PH 15-16b)(1967) (25 pages)

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TRANSITORY EFFECTS OF THE EARTHQUAKE 3 and lasted for about 10 see. However, in the alluviated area of the Truckee Airport, about 2 miles southwest of Truckee, Mr. Lester Michael reported that the seismie motion was of a rolling nature and lasted for about 30 sec. At Tahoe City, located on the northwest shore of Lake Tahoe approximately 20 miles southwest of Russel Valley, the motion was rolling and was felt for about 15 see; Tahoe City is built on a thin veneer of sediments overlying bedrock. Observers on unconsolidated sediment or at a distanee from the epicenter felt a rolling motion, whereas those on bedrock or close to the epicenter felt a jarring motion. PERMANENT EFFECTS Effects on terrain Broken ground, slumping and fissuring of natural and artificial fill, and rock falls were found along a zone trending north-northeast about 5 miles wide and 10 miles long centered in the Russel Valley area (fig. 2). 120°00' . S) RY & rag Ss. on a “Zp ey ey ¢e Py) aa S oe Cr x AY pew RY Kyburtz Flat 2 we ge &> aN (Z) Truckee STAMPEDE c ae DAMSITE A ~ Little ct seg < . Ry + ‘ re) © Sep 5 bs S Vaseer “ % + Aig Ae re) Be Zz Boca Reservoir EPICENTER Prosser Reservoir Prosser Mt os Zo a S vA 39°20! . — Truckee F fs = (9) —_d iS) fu) oY ¥ O 2 4 6 MILES l l L 5 . FIGURE 2.—Location of zone of ground breakage.