La solution indique également une composante de glissement d'environ 2 m dans la direction du pendage de la faille, abaissant le compartiment ouest le long de la partie sud de la section nord de la faille. The Mw7.1, Hector Mine, California earthquake of October 16, 1999 produced a 50 km-long surface rupture, ∼20 km east of the surface rupture of the 1992 Landers earthquake. Postseismic 1 LOS displacement (large image) between day 4 and 249 after the Hector Mine earthquake (10-mm contour intervals). Reports were filed as far north as Carson City, Nevada, where one woman reported waking up, hearing chimes in her house ringing. The close spacing between the two earthquakes suggests that the Landers earthquake trigger the Hector Mine event. The Hector Mine earthquake was preceeded by a small cluster of foreshocks that begin about 20 hours before the onset of the mainshock. 2 . Complex northward rupture began on two branches of the Lavic Lake fault in the northern Bullion Mountains and also propagated southward onto the Bullion fault. ERS2 radar data acquired before and after the event provide geodetic measurements of two components of the co-seismic surface displacement field. I have just modified one external link on 1999 Hector Mine earthquake. 1999-10-16 09:46:44 (UTC) 34.603°N 116.265°W; 13.7 km depth; Interactive Map. Please tell us about your experience. Its name comes from a nearby quarry named Hec­tor Mine, which is lo­cated 22 kilo­me­ters (14 mi) north­west of the epi­cen­ter. By continuing you agree to the use of cookies. Des images radar acquises par le satellite ERS2 avant et après l'événement fournissent la mesure de deux composantes du champ de déplacement co-sismique. Examples from the 1999 Hector Mine, California, Earthquake by David M. Boore, Christopher D. Stephens, and William B. Joyner* Abstract Residual displacements for large earthquakes can sometimes be deter-mined from recordings on modern digital instruments, but baseline offsets of un-known origin make it difficult in many cases to do so. Pulinets et al. M 7.1 - Hector Mine, CA Earthquake. The event caused mini- Contribute to citizen science. OCTOBER 16, 1999 HECTOR MINE EARTHQUAKE By: William G. Byers, P.E. In 1999 the fourth strongest earthquake in the last 100-years rocked the Coachella Valley, the epicenter was about 32 miles north of Joshua Tree, however a geologist with California State University San Bernardino said the Hector Mine earthquake would be a household name if it had struck closer to Palm Springs. The Hector Mine earthquake occurred on 16 October 1999, within the ECSZ (Fig. the 1999 Hector Mine earthquake is in the stress shadow of the 1992 Landers earthquake (e.g., Hauksson et al., 1999; Wyss et al., 1999), while others suggest the opposite (Par-sons and Dreger, 2000). The Hector Mine earthquake occurred in the eastern Mojave Desert, where the density of permanent Global Positioning System (GPS) stations is relatively low. Une telle composante est en accord avec un régime compressif sur une faille à pendage vers le nord-est, comme le suggère la distribution en profondeur des répliques sismiques. The strike-slip earthquake occurred in a remote part of the Mojave Desert, 47 miles (76 km) east-southeast of Barstow, California, inside the Twentynine Palms Marine Corps Base. I made the following changes: The slip distribution curve constructed using the azimuth offsets has a bell shape, with a maximum of 6.5 m at the north end of the central fault section. Many people were awakened in Las Vegas, with many reporting dizziness or trouble walking. This fault geometry and slip pattern presents a puzzle, because the northwest branch of this system should be in the stress … Radiated Energy from the 16 October 1999 Hector Mine Earthquake: Regional and Teleseismic Estimates A. Venkataraman Luis Rivera 1, 2 H. Kanalori Détails 1 IPGS - Institut de physique du globe de Strasbourg The fault slip model derived from the inversion of the azimuth and from range displacement data indicates that 3–5.8 m of right-lateral slip occurred between the depths of 0 and 8 km along the northern and the central sections of the fault. The 1999 Hector Mine earthquake in southern California (magnitude 7.1) occurred only 20 km from, and 7 years after, the 1992 Landers earthquake (magnitude 7.3). If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. Color scale varies from dark blue, representing the greatest away-from-satellite displacement (max. VIII mmi. Case Study: M7.1 October 16, 1999 Hector Mine, California, Earthquake. Abstract. Le tremblement de terre de Hector Mine, en Californie, de magnitude 7,1, survenu le 16 octobre 1999 a produit une rupture de surface de 50 km de long, à ∼20 km à l'est de la rupture du tremblement de terre de Landers de 1992. All rights reserved. Citizen Scientist Contributions ; Did You Feel It? (1) Interferometric processing of the data provides the range (radar line of sight) component of the displacement field with a precision of a few millimeters. Abstract The 16 October 1999 (M w 7.1) Hector Mine earthquake was the largest earthquake in California since the 1992 (M w 7.3) Landers event. motions using regional and local distance data was used to study the October 16, 1999 Hector Mine earthquake (Mw7.1). ABSTRACT On October 16, 1999 a magnitude 7.1 earthquake southwest of Ludlow, CA damaged the double track main line of the Burlington Northern and Santa Fe Railway. The 1999 Hector Mine Earthquake: The Dynamics of a Branched Fault System by David D. Oglesby, Steven M. Day, Yong-Gang Li, and John E. Vidale Abstract The 1999 M 7.1 Hector Mine earthquake ruptured a complex fault sys-tem with a branched structure in the north. Macroscopic features ob-served along the San Andreas fault in 1999 indicated a short-term transient opening or propagating wrinklelike pulse of the fault during triggered-slip movement; comparison of strong-motion records on either side of the fault suggests the plausibility of this process. Its name comes from a nearby quarry named Hector Mine, which is located 22 kilometers (14 mi) northwest of the epicenter. The sequence of 12 foreshocks of up to magnitude 3.8 that began 20 hours before the Hector Mine event occurred in the same location as a cluster of off-fault aftershocks of the Landers quake.[5]. Please take a moment to review my edit. Responses. 1999 Hector Mine Earthquake Author: Fredo On October 16,1999 I was first out,sound asleep, in room 259 in the Union Pacific's Yermo Railroad Inn, affectionatly known as THE BEANERY. 5 . (2) The sub-pixel correlation of the before and after amplitude images provides a second component of the surface displacement field, parallel to the satellite track, with a precision of ∼20 cm. The 1999 Hector Mine earthquake occurred on October 16 at 02:46:50 PDT with a moment magnitude of 7.1 and a maximum Mercalli intensity of VII (Very strong). The 1999 Hector Mine Earthquake: Near-Field Postseismic Deformation from ERS Interferometry 1435 Figure 3. The 1999 Mw 7.1 Hector Mine earthquake occurred only 20 km from the 1992 Mw 7.3 Landers earthquake fault. The M w 7.1 Hector Mine earthquake occurred within the Mojave Desert portion of the eastern California shear zone and was accompanied by 48 km of dextral surface rupture. We want to determine if the 1999 Hector Mine earthquake occurred at a location where the Coulomb stress was increased (earthquake advance, stress trigger) or decreased (earthquake delay, stress shadow) by the previous large earthquake. The 1999 Hector Mine earthquake was a magnitude 7.1 earthquake that occurred on October 16, 1999 at 2:46:44 PDT 47 Miles ESE of Barstow, California.The earthquake occurred in a remote part of the Mojave Desert, inside the Twentynine Palms Marine Corps Base.Its name comes from a nearby quarry named Hector Mine, which is located 22 kilometers (14 mi) northwest of the epicenter. Almost no damage was reported in the immediate area of the earthquake due to the remote location of the epicenter in the Mojave Desert, with no settlements for 14 miles in all directions; however, an Amtrak westbound Southwest Chief (train #3) became an unusual victim of the earthquake. 1 . [6][7], "Lack of Precursory Slip to the Hector Mine Earthquake as constrained by INSAR", "Interactions between the Landers and Hector Mine, California, Earthquakes from Space Geodesy, Boundary Element Modeling, and Time-Dependent Friction", https://en.wikipedia.org/w/index.php?title=1999_Hector_Mine_earthquake&oldid=986956501, 1999 natural disasters in the United States, Creative Commons Attribution-ShareAlike License, This page was last edited on 3 November 2020, at 23:59. The down-dip component of slip is consistent with compression on a northeast dipping fault. Burlington Northern and Santa Fe Railway 4515 Kansas Avenue Kansas City, Kansas 66106 Phone (913) 551-4070 Fax (913) 551-4797 . 0 . 2 . (2) La corrélation des images d'amplitude fournit la composante du déplacement en azimut, parallèle à la trace du satellite, avec une précision de ∼20 cm. ERS2 radar data acquired before and after the event provide geodetic measurements of two components of the co-seismic surface displacement field. Its name comes from a nearby quarry named Hector Mine, which is located 22 kilometers (14 mi) northwest of the epicenter. La courbe de distribution de glissement, construite à partir des données de déplacement en azimut, a une forme en cloche et atteint un maximum de 6,5 m le long de la partie nord de la section centrale de la faille. #1 1999 Hector Mine earthquake Earthquake Updated: 2020-02-10 The 1999 Hector Mine earthquake occurred on October 16 at 02:46:50 PDT with a moment magnitude of 7.1 and a maximum Mercalli intensity of VII. 1999 Hector Mine earthquake. It is thought that the earthquake may have been triggered by the 1992 Landers earthquake seven years prior, since the recurrence interval of large earthquakes in the Eastern California Shear Zone is considered to be in the order of thousands of years. The train was traveling near the epicenter when the quake struck. It provides an excellent site for a fault-zone trapped wave study. The surface rupture and seismicity patterns of the 1999 Hector Mine earthquake present somewhat of a puzzle to earthquake modelers. Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, https://doi.org/10.1016/S1251-8050(01)01658-5. Preliminary Report on the 16 October 1999 M 7.1 Hector Mine, California, Earthquake Scientists from the U.S. Geological Survey, Southern California Earthquake Center, and California Division of Mines and Geology INTRODUCTION The M w 7.1 Hector Mine, California, earthquake occurred at 9:46 GMT on 16 October 1999. The combined force of the quake and train caused several rails to come loose and the train derailed. The earthquake was felt throughout Southern California, as well as in Las Vegas, Nevada. Le modèle de glissement sur la faille, calculé par inversion des deux composantes du déplacement de surface, indique qu'un glissement dextre de 3 à 5,8 m s'est produit entre 0 et 8 km de profondeur, le long des sections nord et centrale de la faille. We use cookies to help provide and enhance our service and tailor content and ads. The Hector Mine earthquake occurred in the central Mojave Desert and produced several meters of slip along faults of total length ~40 km. Based on an elastic half-space model, scientists from the USGS, SCEC and CDMG (2000) have found a negative Coulomb stress change at the Hector Mine hypocenter due to … Contributed by CI 3 ; Regional Information. The Hector Mine earthquake on 16 October 1999, is the secondM7 quake with surface exposure in southern Cali- fornia in the past decades. Le tremblement de terre de Hector Mine, Californie, de magnitude 7,1 : rupture de surface, champ de déplacement et modèle de glissement sur la faille à partir de données SAR du satellite ERS. Copyright © 2021 Elsevier B.V. or its licensors or contributors. The azimuth offset map reveals a ∼50 km long, NNW surface rupture formed of three sections: a N40°W southern section following the Bullion fault, a N10°W central section cutting through the Bullion Mountains, and a northern N40°W section extending up to the Lavic Lake. 1A). The strike-slip earthquake occurred in a remote part of the Mojave Desert, 47 mi east-southeast of Barstow, California, inside the Twentynine Palms Marine Corps Base. Istituto Nazionale di Geofisica e Vulcanologia, L'Aquila, Italy ; Received: 03 Jun 2012 – Revised: 12 Sep 2012 – Accepted: 19 Sep 2012 – Published: 29 Jan 2013. Brief communication "Further comments on the ionospheric precursor of the 1999 Hector Mine earthquake" F. Masci F. Masci . The Mw 7.1, Hector Mine, California earthquake of October 16, 1999 produced a 50 km-long surface rupture, ∼20 km east of the surface rupture of the 1992 Landers earthquake. The Hector Mine earthquake occurred on 16 October 1999, within the ECSZ (Fig. The 1999 Hector Mine earthquake occurred on October 16 at 02:46:50 PDT with a moment magnitude of 7.1 and a maximum Mercalli intensity of VII (Very strong). La carte des déplacements en azimut révèle une rupture de surface de ∼50 km de long, de direction NNW, constituée de trois sections : une section sud, de direction N40°W, une section centrale de direction N10°W, passant au travers du massif de Buillon, et une section nord, de direction N40°W, allant jusqu'au lac de Lavic. The earthquake area was repeatedly imaged by the European Space Agency satellites ERS-1 and ERS-2 over the past 10 years. 1A). Copyright © 2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS. This suggests that the Hector Mine earthquake was triggered in some fashion by the earlier event. Surface faulting features imply that in the north of the fault system, the earthquake ruptured a segment of the Lavic Lake Fault with a north-northwesterly strike. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. A north–south-trending, localized gradient in the azimuth offset field suggests that the central section of the fault extends to the north at depth over a distance of ∼10 km. The earthquake area was repeatedly imaged by the European Space Agency satellites ERS … The solution bears a down-dip component of slip of ∼2 m, west side down, along the southern part of the northern fault section. Satellite ers2 avant et après l'événement fournissent la mesure de deux composantes du champ de co-sismique! 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