![]() ![]() 1933 was - you could call it the school construction earthquake '71, the hospitals. MAFFEI: With every earthquake in California, we have seen improvements. There are building codes and seismic retrofitting projects, usually spurred by an earthquake. Maffei says California has done a lot in recent years. And more than a quarter-million people would be displaced. The average dam in California is about 70 years old. Major infrastructure - highway, transmission lines, aqueducts - would be damaged. There would be 1,600 fires, most of them big, buildings would collapse. According to their predictions, a hypothetical 7.8 magnitude earthquake on the southern San Andreas Fault would result in about 1,800 deaths. Geological Survey has done mock scenarios trying to game out this very situation. We have highway bridges that are going over faults. MAFFEI: You know, our electrical systems that cross the fault, our highways. ROTT: Janiele Maffei is a structural engineer and the chief mitigation officer with the California Earthquake Authority. JANIELE MAFFEI: You're talking about numerous pipes that have water that have fuel. Take that same earthquake and put it in San Francisco or put it in Los Angeles. This what-if exercise is one that earthquake and infrastructure people all over the state are doing in the wake of the recent earthquakes. ROTT: A list that could go on and on and on. You get something like this going through, you've got a lot more pipes, you've got all kinds of structures, you might have subway systems. STEWART: But imagine that this was a dense urban environment, say, Hollywood, which has a fault running through it. ![]() ROTT: It's basically the only infrastructure in sight. In this case, it's impacted this pipeline. JONATHAN STEWART: So as engineers, what we care about with faults rupturing the surface like this is it impacts our infrastructure. That's why Jonathan Stewart, a professor of civil and environmental engineering at the University of California Los Angeles, is here as crews fix both. This highway and a water pipe buried beside it cracked in the 7.1 magnitude earthquake. It looks like a crack in the Earth - not a cartoon-like chasm, just a line in the desert stretching off one way into the distance, the other towards a two-lane highway. NATHAN ROTT, BYLINE: About halfway between the towns of Ridgecrest and Trona, there's a new topographical feature in the high California desert - a fault rupture. No damage was reported from the smaller quake, but the series of earthquakes has many in California thinking about whether they're ready for the next big one. The last time this part of the fault was active was in 1857.Another aftershock has rattled people in Southern California just a week after back-to-back earthquakes there. The best place to see any part of the monstrous, 800-mile San Andreas Fault is in Palmdale in a road cut along the Antelope Valley Freeway (Route 14) just north of Avenue S. Statistically, earthquakes may occur in any kind of weather. No evidence exists that earthquakes are more likely to occur in certain kinds of weather. Most have a magnitude of less than 2.0 and are almost never felt. ![]() Probability of a Major Earthquake in the Los Angeles RegionĪbout 30 earthquakes occur every day in Southern California. Los Angeles Almanac chart.Īlso see the Southern California Earthquake Center. County's largest earthquakes, from smallest in our list to largest, listing year and Richter Scale numbers (also shown in graphic for top five). Relative size (amount of energy released) of L.A. Relative Size of Largest Five Los Angeles County Earthquakes 26 buildings damaged in L.A.Ģ deaths Severe property damage and loss. Mission San Gabriel moderately damaged.īells of Mission San Gabriel torn down. Probability of an Earthquake in the Los Angeles RegionĪlso see: Great Fort Tejon Earthquake, 1857Ĥ0 deaths, Mission San Juan Capistrano severely to moderately damaged. NOTE: In the event of an earthquake, the safest place to be is not in a doorway, but under a table or desk. Contributed by the Griffin Family, courtesy of U.S. Court & Vital Records from Orange County, CAĮarthquake damage in Long Beach from the 1933 Earthquake.Postal Zip Code Look-up for Los Angeles County.The Los Angeles Basin - A Huge Bowl of Sand.Can a Volcanic Eruption Occur in Los Angeles?. ![]()
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