Download PDF (190 KB) Abstract. The 2010 event’s aftershock zone extends to the northwest, overlapping with the portion of the fault system that is thought to have ruptured in 1892. On February 23, 1892, an earthquake estimated at magnitude 7.0 (Mw) occurred near Laguna Salada in Baja California, about 80 miles east of San Diego. 100 Largest California Earthquakes (1796-2004) - Los Angeles Times Business The 1892 surface rupture occurred along the Laguna Salada fault system, but significantly northwest of the April 4 epicenter. Objectives of this project were to map and measure surface displacement in the Mw 7.2 1892 Laguna Salada earthquake and to compare the strain field with the Mw 7.2 2010 El Mayor-Cucapah earthquake. The Laguna Salada fault to the south is about 97 km long and produced a M w 7.1–7.2 earthquake in 1892, rupturing 22 km with up to 5 m of oblique dextral and normal slip (Hough & Elliot, 2004; Mueller & Rockwell, 1995). The 1892 earthquake occurred along the Laguna Salada fault system, but surface offsets associated with the 1892 event lie farther northwest than the April 4th mainshock’s epicenter. According to some compilations, the Laguna Salada, Baja California, earthquake of 23 February 1892 ranks among the largest earthquakes in California and Baja California The 1892 earthquake is a reasonable choice for the source of the scarps along the Laguna Salada fault, not only because of the damage pattern interpreted from historical in- State boundaries areoutlinedin gray. The 1892 earthquake occurred along the Laguna Salada fault system, but surface offsets associated with the 1892 event lie farther northwest than the 4 April 2010 mainshock's epicenter. Results of the mapping suggest the earthquake in 1892 ruptured a … But the region where Sunday’s quake occurred has been seismically active for the past year, and there were several foreshocks that occurred, beginning last Wednesday, with magnitudes between 3 and 4, Jones said. The last time a quake caused a surface rupture on the Laguna Salada fault was in 1892, when a magnitude 7 temblor hit. The length of the Laguna Salada fault that ruptured in 1892 also accommodated minor normal sense displacement along much of its length in the recent 2010 Mw 7.2 El Mayor-Cucapah earthquake, which guided the re-mapping effort. 1892.02.24 32.55 –115.65 7.3 Laguna Salada, Baja California Damage San Diego to Imperial Valley 1892.04.19 38.40 –122.00 6.6 Vacaville 1 death, $225 000 loss 1898.03.31 38.20 –122.50 6.4 Mare Island $350 000 loss 1898.04.15 39.20 –123.80 ~ 6.7 Fort Bragg - … References. surface ruptures from the 2010 El Mayor-Cucapah and 1892 Laguna Salada earthquakes, ... EMC earthquake also did not occur on any of the dominant fault strands at this latitude of the plate margin (eg., Imperial, Cerro Prieto, Laguna Salada, and Cañada David faults; Fig. Geology. Stress at the hypocenter of the 1968 Borrego Mountain earthquake was increased by the 1812 Wrightwood, 1857 Fort Tejon, 1892 Laguna Salada and 1940 Imperial Valley quakes. The Laguna Salada fault had an earthquake of similar size in 1892 (Hough and Elliot, 2004 BSSA). The magnitude 7.2 earthquake that jolted northern Mexico and Southern California yesterday afternoon was the first big earthquake to occur on this particular fault system since 1892, scientists say. In 1892 a magnitide-7-7.5 earthquake occurred on the Laguna Salada Fault. The rupture parallels the EMC rupture less than 2 km away, suggesting that the two faults are part of the same fault system. largest earthquake in the area since the Laguna Salada quake in 1892. Revisiting the 23 February 1892 Laguna Salada Earthquake . The 1892 Laguna Salada earthquake occurred at 23:20 Pacific Standard Time on February 23. This brief report describes fault rup-ture, liquefaction and lateral spread, and the effects of the earthquake on buildings, bridges, water and waste-water systems, nonstructural compo-nents, agriculture and the economy. The fact that the area was largely uninhabited helped to minimize damage and meant that there were no fatalities. [c6, p159] The strong earthquake of February 24, 1892, located near the United States-Mexican border was assigned to the Agua Caliente fault north of the border by Toppozada and others (1981) and to the Laguna Salada fault in Baja California by Strand (1980). The first was the 1892 earthquake estimated at magnitude 7.0-7.2 along the Laguna Salada fault just south of the USA-Mexico border. 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 quake originally was believed to have occurred on the Laguna Salada Fault, which is about 60 kilometers (37 mi) to 80 km (50 mi) long and straddles the California–Baja California border. Although surface rupture was not documented at the time of the earthquake, recent geologic investigations have identified and mapped a rupture on the Laguna Salada fault that can be associated with high probability with the 1892 event (Mueller and Rockwell, 1995). According to some compilations, the Laguna Salada, Baja California, earthquake of 23 February 1892 ranks among the largest earthquakes in … the Mw 7.2 1892 Laguna Salada earthquake and to compare the strain field with the Mw 7.2 2010 El Mayor-Cucapah earthquake. The most recent surface rupture was a magnitude 7 that occurred on February 23rd, 1892. In 1956 a magnitide-6.8 earthquake originated on the San Miguel-Vallecitos fault. The Laguna Salada Fault zone is about 70 km in length and slips at an estimated rate of 4 mm/yr. Abstract. The Laguna Salada Fault is thought to be the origin of the 2010 Baja California earthquake. FEBRUARY 24, 1892 (M=7). Measured on a seismic scale that is based on an isoseismal map or the event's felt area, the 6.4 Mla and 6.2 Mla events were assigned a maximum Mercalli intensity of IX (Violent), and affected the North Bay and Central Valley areas. The shock was centered near the Mexico–United States border and takes its name from a large dry lake bed in Baja California, Mexico. Faults areblack withthe major faultslabeled. The western margin of the Sierra Cucapah is defined by the Laguna Salada fault (LSF), which forms part of an active west-directed oblique detachment system recognized as the source of the large (M7+) February 22, 1892 earthquake. Tuesday's earthquake, a 5.4, fell below the 200 biggest California quakes on record. The 1892 Laguna Salada earthquake and approximate rupture are shown by blue star and line along withother past rupturesdiscussed in the text. Comprehensive reports on the earth- This is an area with a high level of historical seismicity, and also it has recently been seismically active, though this is the largest event to strike in this area since 1892. We have made contact with colleagues across the border: Javier Gonzales is the contact for geodetic observations in Mexico, Victor Wong is the contact for seismological observations, and John Fletcher for geological observations. El terremoto de 1892 Laguna Salada se produjo a las 23:20 hora estándar del Pacífico el 23 de febrero.Tenía un estimado de la magnitud del momento de 7,1-7,2 y una intensidad máxima percibida de VIII ( severa).El choque fue centrado cerca de la frontera entre México y Estados Unidos, y toma su nombre de un gran lago seco en Baja California, México. Wikipedia, The 1892 Laguna Salada earthquake occurred at 23:20 Pacific Standard Time on February 23. The 1892 Vacaville–Winters earthquakes occurred in northern California as a large doublet on April 19 and April 21. Damage also occurred at Dixon as well as the area of the highest reported intensity of IX (Violent), midway between Winters and Vacaville, at Allendale. The Kern County Earthquake of July 21 is commonly referred to as the Tehachapi Earthquake, and for good reason. [3] The earthquake was the result of a rupture along the Imperial Fault, with its epicenter 5 miles (8.0 km) north of Calexico, California. By Susan E. Hough and Austin Elliot. It produced a complex rupture that left the Laguna Salada fault, which was almost perfectly oblique, with striations and offsets indicating ~45 degree rake, parallel to the intersection of the two faults that were activated. Few pictures of the Laguna Salada scarp taken in 2003, ... the 23 february 1892, M~7.2, earthquake appears to be a likely candidate to these surface ruptures. Results of the mapping suggest the earthquake in 1892 ruptured a segmented set of faults, separated by seismic gaps. Stress at the hypocenter of the 1992 Big Bear quake was decreased by the 1812 Wrightwood, 1857 Fort Tejon and the 1899 and 1915 San Jacinto quakes. It is estimated that the Agua Blanca Fault has the capacity to generate earthquakes as large as magnitide-7.3. 4). GlobalPositioning earthquake in northern Sonora, Mexico (DuBois and Smith, 1980), the remote epicentral region of the 1892 event was apparently never investigated at the time of the earthquake. The 2010 event's aftershock zone extends to the northwest, overlapping with the portion of the fault system that is thought to have ruptured in 1892. It had an estimated moment magnitude of 7.1–7.2 and a maximum perceived intensity of VIII . 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