Landers Earthquake

1992 ◽  
Author(s):  
Douglas V. Prose
Keyword(s):  
Landers Earthquake

scholarly journals Spatial and temporal distribution of slip for the 1992 Landers, California, earthquake

1994 ◽  
Vol 84 (3) ◽  
pp. 668-691 ◽  
Author(s):  
David J. Wald ◽  
Thomas H. Heaton
Keyword(s):  
Strike Slip ◽  
Quality Data ◽  
Data Sets ◽  
Rupture Velocity ◽  
Frequency Range ◽  
Fault Surface ◽  
Landers Earthquake ◽  
Finite Fault ◽  
Multiple Data Sets ◽  
Fault Length

Abstract We have determined a source rupture model for the 1992 Landers earthquake (MW 7.2) compatible with multiple data sets, spanning a frequency range from zero to 0.5 Hz. Geodetic survey displacements, near-field and regional strong motions, broadband teleseismic waveforms, and surface offset measurements have been used explicitly to constrain both the spatial and temporal slip variations along the model fault surface. Our fault parameterization involves a variable-slip, multiple-segment, finite-fault model which treats the diverse data sets in a self-consistent manner, allowing them to be inverted both independently and in unison. The high-quality data available for the Landers earthquake provide an unprecedented opportunity for direct comparison of rupture models determined from independent data sets that sample both a wide frequency range and a diverse spatial station orientation with respect to the earthquake slip and radiation pattern. In all models, consistent features include the following: (1) similar overall dislocation patterns and amplitudes with seismic moments of 7 to 8 × 1026 dyne-cm (seismic potency of 2.3 to 2.7 km3); (2) very heterogeneous, unilateral strike slip distributed over a fault length of 65 km and over a width of at least 15 km, though slip is limited to shallower regions in some areas; (3) a total rupture duration of 24 sec and an average rupture velocity of 2.7 km/sec; and (4) substantial variations of slip with depth relative to measured surface offsets. The extended rupture length and duration of the Landers earthquake also allowed imaging of the propagating rupture front with better resolution than for those of prior shorter-duration, strike-slip events. Our imaging allows visualization of the rupture evolution, including local differences in slip durations and variations in rupture velocity. Rupture velocity decreases markedly at shallow depths, as well as near regions of slip transfer from one fault segment to the next, as rupture propagates northwestward along the multiply segmented fault length. The rupture front slows as it reaches the northern limit of the Johnson Valley/Landers faults where slip is transferred to the southern Homestead Valley fault; an abrupt acceleration is apparent following the transfer. This process is repeated, and is more pronounced, as slip is again passed from the northern Homestead Valley fault to the Emerson fault. Although the largest surface offsets were observed at the northern end of the rupture, our modeling indicates that substantial rupture was also relatively shallow (less than 10 km) in this region.

Transient stresses at Parkfield, California, produced by theM7.4 Landers earthquake of June 28, 1992: Observations from the UPSAR dense seismograph array

1995 ◽  
Vol 100 (B1) ◽  
pp. 675-690 ◽  
Author(s):  
Paul Spudich ◽  
Lee K. Steck ◽  
Margaret Hellweg ◽  
J. B. Fletcher ◽  
Lawrence M. Baker
Keyword(s):  
Landers Earthquake

scholarly journals Earthquake Cycle Modelling of Multi-segmented Faults: Dynamic Rupture and Ground Motion Simulation of the 1992 Mw 7.3 Landers Earthquake

2019 ◽  
Vol 177 (5) ◽  
pp. 2163-2179 ◽  
Author(s):  
Percy Galvez ◽  
Paul Somerville ◽  
Anatoly Petukhin ◽  
Jean-Paul Ampuero ◽  
Daniel Peter
Keyword(s):  
Ground Motion ◽  
Motion Simulation ◽  
Earthquake Cycle ◽  
Dynamic Rupture ◽  
Ground Motion Simulation ◽  
Landers Earthquake

Annual modulation of triggered seismicity following the 1992 Landers earthquake in California

Nature ◽  
2000 ◽  
Vol 406 (6795) ◽  
pp. 500-504 ◽  
Author(s):  
Stephen S. Gao ◽  
Paul G. Silver ◽  
Alan T. Linde ◽  
I. Selwyn Sacks
Keyword(s):  
Annual Modulation ◽  
Landers Earthquake ◽  
Triggered Seismicity ◽  
1992 Landers Earthquake

scholarly journals No Significant Effect of Coulomb Stress on the Gutenberg-Richter Law after the Landers Earthquake

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Víctor Navas-Portella ◽  
Abigail Jiménez ◽  
Álvaro Corral
Keyword(s):  
Coulomb Stress ◽  
Landers Earthquake
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