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Peru Earthquake May 31, 1970. Site of the Yungay plaza showing the remains of the cathedral walls and four palm trees buried to a depth of 5 meters. The ridge that was overtopped by the Yungay debris lobe is visible in the distance. The wreckage in the right middle ground consists of a smashed bus and truck. June-July 1970.
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Peru Earthquake May 31, 1970. Nevados Hascaran, showing the area overrun by the upper part of the debris avalanche (outlined by dashed line): Moraines, M, below Glacier 511 and between Rio Shacsha and Quebrada Armapampa, and areas splattered by airborn mud and boulders. June-July 1970.
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Peru Earthquake May 31, 1970. Damage from the flood wave at the power company camp near Huallanca, which is visible in background. The wave, 20 meters deep at this point, swept away homes that formerly covered the level area in this view and deposited a layer of mud and rocks. The fence posts in the foreground are bent in the direction of the flow. June-July 1970.
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Peru Earthquake May 31, 1970. Flooding of a residential area in southeastern Chimbote where the ground settled substantially because of compaction of water- saturated sediments. 1971.
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Peru Earthquake May 31, 1970. Subsidence of a roadway fill adjacent to the iron ore unloading dock in Chimbote. The fill settled into the weak underlying sediments approximately 1.2 meters at this locality. The dock, which rests on piles driven through the unconsolidated surficial deposits, did not subside. June-July 1970.
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Peru Earthquake May 31, 1970. Block of granodiorite weighing 7,000 tons that was swept along by the Huascaran debris avalanche. Photo by G.E. Ericksen, circa 1970. Pages 68-69 (lower photo), Earthquake Information Bulletin, v.12, no.2.
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Peru Earthquake May 31, 1970. Part of a fishmeal plant at the Port of Casma that was severely cracked as a result of lateral spreading of the underlying unconsolidated sediments and fill. Note the extension effect on the concrete floor slabs. June-July 1970.
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Peru Earthquake May 31, 1970. Destruction of adobe houses in central Huarez. 1970. Back cover, Earthquake Information Bulletin, v.12, no.2.
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Peru Earthquake May 31, 1970. Block of granodiorite estimated to weigh about 7,000 metric tons that was transported by the Huascaran debris avalanche and deposited near the Rio Santa west of Ranrahirca. The top of the block is covered with boulders that were deposited from the debris flow after the block came to rest. This block was left exposed after the enclosing mud flowed and/or was washed away after the avalanche. The pole at the base of the block is 4 meters high. June-July 1970.
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Peru Earthquake May 31, 1970. Fragmentation of thin saline-cemented crust due to earthquake shaking of a soil mound in the desert inland from Casma. 1970
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Peru Earthquake May 31, 1970. Lower part of the Huascaran debris avalanche: Yungay, Ranrahirea, Matacoto, Cemetery Hill in Yungay, overtopped ridge between the Rio Shacsha and Yungay. The combined Yungay and Ranrahirea debris lobes cover an area of about 8 kilometers and probably contain close to 50 million meters of material. June 1970.
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A lobe of the Huascaran debris avalanche that now covers the former city of Yungay; the avalanche flowed over a 100-200 meter high ridge (arrow) between Yungay and Llanganuco Valley. Peru. 1970. Published as figure 4 in U. S. Geological Survey. Circular 639. 1970.
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Peru Earthquake May 31, 1970. Bus and truck were completely intermeshed by the Huascaran debris avalanche. Photo by G.E. Ericksen, 1970. Pages 68-69 (upper photo), Earthquake Information Bulletin, v.12, no.2.
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Chimbote-Huallanca railroad damaged as the result of differential compaction and lateral spreading of water-saturated unconsolidated sediments. Peru. 1970. Published as figure 9 in U. S. Geological Survey Circular 639. 1970.
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Peru Earthquake May 31, 1970. Rotational slide in unconsolidated fluvioglacial sediments east of the Rio Santa at Recuay. A small lake formed behind the toe of the slide which extends obliquely across the river. The headwall scarp of the slide is as much as 10 to 15 meters high. June-July 1970. Figure 14, U.S. Geological Survey Circular 639.
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Peru Earthquake May 31, 1970. Slumping and fissuring in an irrigated field in the Rio Santa valley near Yungay. Minor slumps such as this caused extensive damage to irrigation works. June-July 1970.
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Peru Earthquake May 31, 1970. Up the Rio Santa from 4 miles above Caras, showing the area inundated by the flood wave that originated at the Huascaran debris avalanche. The destructive wave overflowed the banks of the Rio Santa almost continuously to the coast, a distance of about 150 kilometers. June- July 1970.
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Peru Earthquake May 31, 1970. Nevados Huascaran and the Huascaran debris avalanche that destroyed Yungay and Ranrahira. Portion of figure 2, U.S. Geological Survey Circular 639.
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Overturned bus on top of debris avalanche at site of former Plaza de Armas, Yungay. Depth of avalanche here is about 15 feet, Peru, 1970.
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Aerial view showing mountain range including Nevada Huascaran, highest peak in Peru. Massive avalanche of ice and rock debris, triggered on North Peak by May 31, 1970 earthquake, buried towns of Yungay and Ranrahirca, killing more than 20,000 people - about 40 per cent of total death toll. Avalanche started with sliding of mass of glacial ice and rock about 3,000 feet wide and one mile long that swept downslope about nine miles to Yungay at average speed of over 100 miles an hour. Ice picked up morainal material; by the time mass reached Yungay, is estimated to have consisted of about 80 million cubic feet of water, mud and rocks. Peru. 1970. (Photo by Servicio Aerofotografico National) Published as figure 2 in...
map background search result map search result map Destruction of adobe houses in central Huarez. Peru Earthquake, 1970. Aerial view showing mountain range including Nevado Huascaran, highest peak in Peru. Massive avalanche of ice and rock debris, triggered on North Peak by Peru earthquake buried towns of Yungay and Ranrahirca. Peru. 1970. Chimbote-Huallanca railroad damaged as the result of the Peru earthquake. 1970. Nevados Hascaran avalanche showing the area overrun by the upper part of the debris avalanche (outlined by dashed line) caused by the Peru Earthquake. 1970. Up the Rio Santa above Caras, showing the flood wave as a result of the Huascaran debris avalanche. Peru Earthquake 1970. Destruction of adobe houses in central Huarez. Peru Earthquake, 1970. Aerial view showing mountain range including Nevado Huascaran, highest peak in Peru. Massive avalanche of ice and rock debris, triggered on North Peak by Peru earthquake buried towns of Yungay and Ranrahirca. Peru. 1970. Chimbote-Huallanca railroad damaged as the result of the Peru earthquake. 1970. Nevados Hascaran avalanche showing the area overrun by the upper part of the debris avalanche (outlined by dashed line) caused by the Peru Earthquake. 1970. Up the Rio Santa above Caras, showing the flood wave as a result of the Huascaran debris avalanche. Peru Earthquake 1970.