. A history of the earthquake and fire in San Francisco; an account of the disaster of April 18, 1906 and its immediate results. Photos bv Aitkcn Fault Line Views ROAD NEAR OLEMA CRACKS ABOVE OCEAN SHORE RAILROAD SHIFTING ON FAULT LINE 42 THE FAULT LINE through the rocks; CaHfornia shook as a houseshakes in a heavy wind. Slower vibrations, heavier,wider, went out across the sands and soft soils ofthe valleys, as waves go out from a pebble throwninto a quiet pond. At new places along the faultand weak places on other faults, there were newslippings and fractures, and from them new wavesof vibra
. A history of the earthquake and fire in San Francisco; an account of the disaster of April 18, 1906 and its immediate results. Photos bv Aitkcn Fault Line Views ROAD NEAR OLEMA CRACKS ABOVE OCEAN SHORE RAILROAD SHIFTING ON FAULT LINE 42 THE FAULT LINE through the rocks; CaHfornia shook as a houseshakes in a heavy wind. Slower vibrations, heavier,wider, went out across the sands and soft soils ofthe valleys, as waves go out from a pebble throwninto a quiet pond. At new places along the faultand weak places on other faults, there were newslippings and fractures, and from them new wavesof vibrations went out, crossing the others, joiningwith them, jostling everything about sidewise, untilall the region was thrown this way and that, backand forth and across and up and down and about inan indescribable confusion — buffetted about like aship in a storm when wind and waves seem to assailit from all sides at once. The whole earth swayedin unison; delicate instruments thousands of milesaway — in Tokyo, Potsdam, Sitka, and Washington— recorded the Photo by Aitkcn Landslide Along Ocean Shore Railroad THE FAULT LINE 43 At these far-away observatories the instru-ments showed a gentle swaying back and forth,renewed with each new quake, three in all. But therecord at Oakland shows a complex motion whichis a veritable wilderness of crisscrossings. The see-saw, it has been said, was followed by a complexity of the movements involved in thetwister can be realized by attempting to make amarble in a plate traverse such a course as is shownby the earthquake signature written by the seis-mograph at the Chabot Observatory. It was this twister, with its sudden jerkings andreversings and spasmodic joltings, that did the dam-age in the cities near the great fault. Along thefault itself there was a pulling apart and jammingtogether and destruction of fences, bridges, pipe-
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