Event Name: Hector Mine, California Earthquake Event Date: 10/16/1999 09:46 UTC (10/16/1999 02:46 am PDT) Event Identification: 991016_1 Recorder Type: ETNA, K2, MT. SURFACE RUPTURE LENGTH: approx. 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. The train was traveling near the epicenter when the quake struck. Case Study: M7.1 October 16, 1999 Hector Mine, California, Earthquake The Hector Mine earthquake occurred in the central Mojave Desert and produced several meters of slip along faults of total length ~40 km. The 1999 Hector Mine Earthquake: Near-Field Postseismic Deformation from ERS Interferometry 1435 Figure 3. 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. Originally measured at magnitude 7.0, this earthquake was centered in such a remote part of the Mojave Desert that, instead of being named for the nearest town or the community that suffered the greatest damage, it was named after the closest spot in the list of reference points used by the Southern California Seismic Network: the Hector Mine, an open pit quarry 14 miles (22 km) northwest of the epicenter. Video Software we use: https://amzn.to/2KpdCQF Ad-free videos. 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). 1999 Izmit, Turkey (Toksoz et al., 1999), and 1999 Hector Mine, California (Scientists from the USGS et al., 2000), events have emphasized that strike-slip earthquakes com-monly take place on faults that display multiple offset fault segments with gaps and different orientations. These foreshocks were in the same location as a cluster of aftershocks triggered by the 1992 Landers earthquake. 2019 Ridgecrest earthquakes-Wikipedia It was followed by a 7.2 (7.4) quake on a near-by fault, the 1999 Hector Mine earthquake . [1] The October 1999 M w 7.1 Hector Mine earthquake in the Mojave Desert, California, generated characteristic surface disturbances on nearby desert pavements. The top trace shows the recorded acceleration Color scale varies from dark blue, representing the greatest away-from-satellite displacement (max. 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). It provides an excellent site for a fault-zone trapped wave study. 65 mm), Jump to navigation Jump to search. 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. Forgot I made this video back in 1999 when the Hector Mine Earthquake started. When the mainshock struck, just before 2:47 am PDT, the rupture was somewhat slow in starting. TYPE OF FAULTING: right-lateral strike-slip [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=1021838039, 1999 natural disasters in the United States, Creative Commons Attribution-ShareAlike License, This page was last edited on 6 May 2021, at 23:28. The latter, now considered the mainshock, was the most powerful earthquake to occur in the state in 20 years (after the 1999 Hector Mine earthquake). This is the talk page for discussing improvements to the 1999 Hector Mine earthquake article. Put new text under old text. array, Figure 1) Hector Mine earthquake (16 October 1999; M w = 7.1 [U.S. Geological Survey, 2000]) caused significant coseismic deformation of the Landers array and interrupted the monitoring of the Landers postseismic deformation. 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. 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]. HYPOCENTRAL DEPTH: 0.01 km We have demonstrated that it is possible to predict near-fault strong shaking from the derived finite fault parameters. The event was located in a remote, sparsely-populated part of the Mojave desert, approximately 47 miles east-southeast of Barstow and 32 miles north of Joshua Tree. The 1999 Hector Mine earthquake … Two recent large earthquakes in the Mojave Desert, California-the magnitude 7.3 1992 Landers and magnitude 7.1 1999 Hector Mine earthquakes-have each been followed by elevated crustal strain rates over periods of months and years. Find the perfect 1999 Hector Mine Earthquake stock photos and editorial news pictures from Getty Images. The Hector Mine earthquake was preceeded by a small cluster of foreshocks that begin about 20 hours before the onset of the mainshock. Or, try our Real-time Notifications, Feeds, and Web Services . The Earthquake Event Page application supports most recent browsers, view supported browsers. Two recent large earthquakes in the Mojave Desert, California—the magnitude 7.3 1992 Landers and magnitude 7.1 1999 Hector Mine earthquakes—have each been followed by elevated crustal strain rates over periods of months and years. These disturbances included (1) zones of wholesale gravel displacement interspersed with zones of intact pavement, (2) displaced and rotated cobbles, (3) moats around loosened, The close spacing between the two earthquakes suggests that the Landers earthquake trigger the Hector Mine event. M 7.1 - Hector Mine, CA Earthquake The surface rupture was located entirely within the boundaries of the Twentynine Palms Marine Corps Base, and crossed neither paved roads nor structures (unlike the Landers rupture of 1992). Many people were awakened in Las Vegas, with many reporting dizziness or trouble walking. 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. LOCATION: 34° 36' N, 116° 16' W 32 miles north of the town of Joshua Tree 47 miles east-southeast of Barstow The Hector Mine earthquake was preceeded by a small cluster of foreshocks that begin about 20 hours before the onset of the mainshock. Only minor injuries were reported, and the trainset suffered repairable damage. 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. 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 M 7.1 Hector Mine event in particular ruptured a north–south– The October 16, 1999 Hector Mine earthquake provided an opportunity to test those procedures (Dreger and Kaverina, 2000). Stress changes in the crust due to an earthquake can hasten the failure of neighbouring faults and induce earthquake sequences in some cases1,2,3,4,5. 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. The Hector Mine earthquake on 16 October 1999, is the secondM7 quake with surface exposure in southern Cali- fornia in the past decades. The combined force of the quake and train caused several rails to come loose and the train derailed. The Hector Mine earthquake occurred on 16 October 1999, within the ECSZ (Fig. M7.1 Hector Mine Earthquake of 16-26 October 1999, Southern California Earthquake Data Center, Training and Validation Data Sets for Deep Learning, Division of Geological and Planetary Sciences. At 2:46:44 am on the morning of Saturday, October 16, 1999, most of southern California, as well as parts of Arizona and Nevada, shook and rattled in the seismic wake of the largest earthquake to strike the area since the M 7.3 Landers earthquake of June 28, 1992. 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 … the recording of the 1999 Hector Mine earthquake from sta-tion HEC (this is the closest station to the epicenter and rup-ture surface). #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. Talk:1999 Hector Mine earthquake. The Hector Mine earthquake struck in the early morning hours of October 16, 1999. The Hector Mine earthquake struck in the early morning hours of October 16, 1999. The largest of these foreshocks was a magnitude 3.8 tremor that occurred at 7:41 pm PDT on October 15. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract The 1999 M 7.1 Hector Mine earthquake ruptured a complex fault system with a branched structure in the north. 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. The earthquake area was repeatedly imaged by the European Space Agency satellites ERS … However, by the time of the Hector Mine earthquake the rapid postseismic deformation due to the Landers earth- FAULTS RUPTURED: the Lavic Lake fault and the central section of the Bullion fault; some slip may have occurred along other nearby fault zones (current studies are working on this issue) The 1999 Hector Mine Earthquake, Southern California: Vector Near-Field Displacements from ERS InSAR David T. Sandwell, Lydie Sichoix, & Robert B. Smith Published May 2002, SCEC Contribution #619 People in most of Southern California as well as parts of Arizona and … We present a rupture model of the Hector Mine earthquake (M 7.1), determined from the joint inversion of strong-motion records, P and SH teleseismic body waves, Global Positioning System (GPS) displacement vectors, and measured surface offset.We solve for variable local slip, rake angle, rise time, and rupture velocity of a finite-fault model involving multiple segments. This suggests that the Hector Mine earthquake was triggered in some fashion by the earlier event. Its name comes from a nearby quarry named Hector Mine, which is located 22 kilometers (14 mi) northwest of the epicenter. Postseismic 1 LOS displacement (large image) between day 4 and 249 after the Hector Mine earthquake (10-mm contour intervals). 41 km (26 miles) The 1999 Mw 7.1 Hector Mine earthquake occurred only 20 km from the 1992 Mw 7.3 Landers earthquake fault. Special Report: The Hector Mine Earthquake, 10/16/1999 (Updated 10/21/99) A M7.1 earthquake occurred at 2:46 a.m. local time on 10/16/1999. The largest of these foreshocks was a magnitude 3.8 tremor that occurred at 7:41 pm PDT on October 15. 2019 Ridgecrest earthquakes - … But within about 10 seconds it was over, having ruptured in both directions (bilaterally) from the epicenter: north along the Lavic Lake fault for about 15 kilometers, and south along the Lavic Lake fault and the central Bullion fault for another 26 kilometers. 1 A). Two recent large earthquakes in the Mojave Desert, California - the magnitude 7.3 1992 Landers and magnitude 7.1 1999 Hector Mine earthquakes - have each been followed by elevated crustal strain rates over periods of months and years. 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 surface rupture and seismicity patterns of the 1999 Hector Mine earthquake present somewhat of a puzzle to earthquake modelers. Reports were filed as far north as Carson City, Nevada, where one woman reported waking up, hearing chimes in her house ringing. This is not a forum for general discussion of the article's subject. 3 views from 3 of my security cameras show the movement. The M 7.3 June 28, 1992 Landers and M 7.1 October 16, 1999 Hector Mine earthquakes, California, both right lateral strike-slip events on NNW-trending subvertical faults, occurred in close proximity in space and time in a region where recurrence times for surface-rupturing earthquakes are thousands of years. Its name comes from a nearby quarry named Hector Mine… MAXIMUM SURFACE OFFSET: 5.2 meters. This fault geometry and slip pattern presents a puzzle, because the northwest branch of this system should be in the stress shadow of the north branch, upon which nucleation likely took place. 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