2004) [7]. Required fields are marked *. [9] The Imperial Fault had not been previously differentiated from the other faults in the area by geologists until after the earthquake occurred. [15] It is often used in design of earthquake-proof structures today, particularly for the time history analysis method. The Valley was named for the Imperial Land Company—a subsidiary of the California Development Company—which at the beginning of the twentieth century had reclaimed the southern portion of the Colorado Desert for agriculture. It affected approximately 100 km of the fault, from the San Francisco Peninsula to the Santa Cruz Mountains. La ĉi-suba teksto estas aŭtomata traduko de la artikolo 1940 El Centro earthquake article en la angla Vikipedio, farita per la sistemo GramTrans on 2016-01-23 07:05:34. A small sector of damage near Bealville corresponded to a maximum Mercalli intensity of XI (Extreme), though this intensity rating was not representative of the majority of damage. The 1940 El Centro earthquake (or 1940 Imperial Valley earthquake) occurred at 21:35 Pacific Standard Time on May 18 (05:35 UTC on May 19) in the Imperial Valley in southeastern Southern California near the international border of the United States and Mexico. This gave a detailed record of the different types of shaking associated with the earthquake. Geologically, the El Centro earthquake of 1940 on the Mercalli intensity scale. The shock occurred on the Calaveras Fault near Coyote Lake in Santa Clara County, California and resulted in a number of injuries, including some that required hospitalization. The displacement pattern of the two earthquakes was very similar on the US side, suggesting that the Imperial Fault slips in discrete patches. The 1981 Westmorland earthquake occurred at 05:31 Pacific Daylight Time on April 26. The 1918 San Jacinto earthquake occurred in extreme eastern San Diego County in Southern California on April 21 at 14:32:29 local time. The two main right lateral strike-slip fault strands that extend across the southern part of the trough are the Elsinore Fault Zone/Laguna Salada Fault to the western side of the trough and the Imperial Fault to the east. Other events in 1852, 1892, 1915, 1942, 1979, and 1987 have impacted the region in varying degrees. A non-destructive aftershock sequence that lasted throughout the remainder of the month was of interest to seismologists, especially with regard to fault creep, and following the event local governments evaluated their response to the incident. Se vi volas enigi tiun artikolon en la originalan Esperanto-Vikipedion, vi povas uzi nian specialan redakt-interfacon. The 1980 Eureka earthquake occurred on November 8 at 02:27:34 local time along the northern coastal area of California in the United States. The response spectra of the El-Centro, 1940 earthquake ground motion are computed using the exact method described in the Chapterearlier (refer Appendix-I, for digitized values of the earthquake). [7], The earthquake was the result of a rupture along the Imperial Fault, with its epicenter 5 miles (8.0 km) north of Calexico, California. Talk:1940 El Centro earthquake. The initial estimate of the strength of the earthquake was 6.4 but, as surface destruction was examined in greater detail, it became clear that the present figure of 7.1 is more appropriate; putting the Imperial Valley earthquake comparable to the San Francisco 1906 quake as far as magnitude is concerned. The 1983 Coalinga earthquake struck at 4:42 p.m. Monday, May 2 of that year, in Coalinga, California. The San Jacinto Fault Zone (SJFZ) is a major strike-slip fault zone that runs through San Bernardino, Riverside, San Diego, and Imperial Counties in Southern California. [3] A strong secondary quake with a magnitude of 5.5 followed a little more than an hour after the main shock and was centered near Brawley. The 1979 Imperial Valley earthquake occurred at 16:16 Pacific Daylight Time on 15 October just south of the Mexico–United States border. [17] A 1970 report on the earthquake in the Bulletin of the Seismological Society of America defined an event as "any occurrence of energy release which generates seismic phases that can be resolved and identified" then stated that the size of those discrete events were abnormally strong for regular aftershocks. And carried it out to his car the first major earthquake to be recorded by a strong-motion located... You could also do it yourself at any point in time the and! [ 15 ] it was the first major earthquake to be recorded a. May 2 of that year, in several hundred years Table - 160 % El Centro.! 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