https://peertube.dngr.us/videos/watch/5f9c5a5b-87f7-4650-a117-8b60f8459587 Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Help us preserve, scan and post more rare and endangered films! Join us on Patreon. Visit https://www.patreon.com/PeriscopeFilm Visit our website www.PeriscopeFilm.com Released by Encyclopedia Brittanica "The San Andreas Fault" (1974) is about the famous seismic fault and its impact on California. It covers the geological forces at work along the fault, the history of significant earthquakes, and the ongoing scientific efforts to study and predict seismic activity. The film highlights the devastating 1906 San Francisco earthquake and explains how the fault's movement affects the landscape and infrastructure. It also discusses the potential for future earthquakes and the importance of understanding and preparing for these natural events. • 0:18: Thousands gather annually in San Juan Bautista, California, for a rodeo. Empty fairgrounds are shown. • 0:30: The base of the bank marks where two portions of the Earth's crust collide, creating mountains and triggering tremors. • 0:54: Similar forces are at work near San Francisco, 125 km north. Aerial shot of downtown San Francisco including Union Square and the TransAmerica building. • 1:01: In 1906, San Francisco was devastated by a major earthquake, killing over 700 people. • 1:24: The earthquake prompted studies into the origins of earthquakes, revealing the San Andreas Fault. • 1:52: Near San Francisco, urbanization has nearly obliterated the fault's trace. • 2:00: The fault is visible in radar images of the San Francisco Bay Area. • 2:24: The San Andreas Fault is most evident on the flatland of central California's Cizo Plain. • 3:00: The fault appears as a thin, well-defined line of deformation in some places. • 3:30: In steep terrain, deep eroded channels mark the fault's path. • 4:01: The San Andreas Fault extends 1100 km from Mexico through California to the sea. • 4:14: The fault system includes branches, with rocks squeezed and fractured by pressure. Geologists shown looking at the fault zone. • 5:03: Granite in the fault zone is crushed to powder due to millions of years of grinding action. • 5:14: A highway passes through terrain forced upward by fault pressure. • 6:03: Streams crossing the fault are offset by fault motion. • 7:00: Streams erode new paths, but are again offset by fault movement. • 8:04: Different types of rock lie side by side, indicating fault movement over millions of years. • 9:00: Matching rocks on opposite sides of the fault suggest movement over 20 million years. • 9:30: The fault's motion includes slow, continuous creep and sudden, violent earthquakes. • 10:34: Earthquakes often originate along fault branches, with shock waves damaging buildings. Visual: a seismometer is shown. Railroad tracks bent by the force of an earthquake are shown. 10:55: Damage to a freeway, probably from the 1971 San Fernando Earthquake. • 11:35: Geologists believe the San Andreas Fault is the border between two crustal plates. • 12:00: The Pacific Plate moves northwestward relative to the North American Plate. • 12:46: Geologists study fault movement to predict earthquakes. • 13:01: Tilt meters measure land slope changes near the fault. • 13:27: Helicopters help teams place measuring equipment. Laser beams, which can measure horizontal movement across the fault, are shown. • 14:10: Creep meters directly measure fault movement. • 14:43: Hundreds of minor tremors occur annually along the fault. • 15:22: Seismometers measure tremors, providing data for earthquake research. An oscilloscope is shown. • 16:22: Laboratory experiments simulate fault locking and slipping behavior. • 17:00: A punch card and digital computer are used to analyze seismic data to monitor fault activity. • 17:16: Geologists estimate strain in the fault's northern reaches is approaching 1906 levels. Aerlal shots of downtown San Francisco. The Golden Gate Bridge is seen at 17:30 followed by shots of neighborhoods as seen from the air, • 18:03: California's population growth increases earthquake risk. • 18:20: Geologists agree a major earthquake is inevitable, but timing is uncertain. • 19:00: The larger story of Earth's crust movement and its effects. Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. We'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=8prl6F0PgWc Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Sat, 13 Jun 2026 13:20:53 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/5f9c5a5b-87f7-4650-a117-8b60f8459587 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.