Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles

Argus, Donald F.; Heflin, M. B.; Peltzer, G.; Crampé, F.; Webb, F.

doi:10.1029/2003jb002934

Cited by 107 publications

(184 citation statements)

References 62 publications

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“…The simplest approach relies on two-dimensional cross-sectional models of geodetic velocity profiles, which allow examination of slip partitioning or material heterogeneity for specific sections of the plate boundary [Malservisi et al, 2001;Johnson and Segall, 2004;Le Pichon et al, 2005;Argus et al, 2005;Hilley et al, 2005;Fay and Humphreys, 2005;Schmalzle et al, 2006;Fialko, 2006;Johnson et al, 2007]. For the SJF-SAF system, the elastic deep slip-driven fault model of Fialko [2006] finds slip rates of 25 ± 3 and 19 -21 mm/a for the SAF and SJF, respectively, whereas the elastic and viscoelastic models of Fay and Humphreys [2005] find rates of about 22-23 and 14-15 mm/a for the SAF and SJF, respectively (Table 1).…”

Section: Introductionmentioning

confidence: 99%

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

Lundgren¹,

Hetland²,

Liu³

et al. 2009

J. Geophys. Res.

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[1] We use ground geodetic and interferometric synthetic aperture radar satellite observations across the southern San Andreas (SAF)-San Jacinto (SJF) fault systems to constrain their slip rates and the viscosity structure of the lower crust and upper mantle on the basis of periodic earthquake cycle, Maxwell viscoelastic, finite element models. Key questions for this system are the SAF and SJF slip rates, the slip partitioning between the two main branches of the SJF, and the dip of the SAF. The best-fitting models generally have a high-viscosity lower crust (h = 10 21 Pa s) overlying a lower-viscosity upper mantle (h = 10 19 Pa s). We find considerable trade-offs between the relative time into the current earthquake cycle of the San Jacinto fault and the upper mantle viscosity. With reasonable assumptions for the relative time in the earthquake cycle, the partition of slip is fairly robust at around 24-26 mm/a for the San Jacinto fault system and 16-18 mm/a for the San Andreas fault. Models for two subprofiles across the SAF-SJF systems suggest that slip may transfer from the western (Coyote Creek) branch to the eastern (Clark-Superstition hills) branch of the SJF from NW to SE. Across the entire system our best-fitting model gives slip rates of 2 ± 3, 12 ± 9, 12 ± 9, and 17 ± 3 mm/a for the Elsinore, Coyote Creek, Clark, and San Andreas faults, respectively, where the large uncertainties in the slip rates for the SJF branches reflect the large uncertainty in the slip rate partitioning within the SJF system.Citation: Lundgren, P., E. A. Hetland, Z. Liu, and E. J. Fielding (2009), Southern San Andreas-San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations,

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Section: Introductionmentioning

confidence: 99%

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

Lundgren¹,

Hetland²,

Liu³

et al. 2009

J. Geophys. Res.

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“…The uplift in this area also differs in sign from that of the long-term regional trends determined by ARGUS et al (2005). This result is more striking because other regions of known groundwater subsidence are visible in Fig.…”

Section: Inversionmentioning

confidence: 51%

“…Here we can see that while this model provides a better fit for the vertical deformation, it still underestimates the maximum uplift. It simplifies the variation in the uplift pattern across the aquifer, and there is a sharp an edge to the deformation at the aquifer edges, without the gradual changes seen by others (ARGUS et al, 2005).…”

Section: Inversionmentioning

confidence: 99%

“…8), has a significant compressional tectonic strain component oriented approximately north-south. However, accurate estimation of the amplitude of the tectonic rate of strain has been difficult due to contamination from other geophysical sources, particularly anthropogenic signals associated with groundwater pumping in the region (ARGUS and GORDON, 2001;BAWDEN et al, 2001;WATSON et al, 2002;LANARI et al, 2004;ARGUS et al, 2005;KING et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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An Elliptical Model for Deformation Due to Groundwater Fluctuations

Tiampo

Ouegnin

Valluri

et al. 2011

Pure Appl. Geophys.

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Abstract-Historically, surface subsidence as a result of subsurface groundwater fluctuations have produced important and, at times, catastrophic effects, whether natural or anthropogenic. Over the past 30 years, numerical and analytical techniques for the modeling of this surface deformation, based upon elastic and poroelastic theory, have been remarkably successful in predicting the magnitude of that deformation (LE MOUÉLIC and ADRAGNA in Geophys Res Lett 29:1853, 2002). In this work we have extended the formula for a circular-shaped aquifer (Geertsma in J Petroleum Tech 25: [734][735][736][737][738][739][740][741][742][743][744] 1973) to a more realistic elliptical shape. We have improved the accuracy of the approximation by making use of the cross terms of the expansion for the elliptic coordinates in terms of the eccentricity, e, and the mean anomaly angle, M, widely used in astronomy. Results of a number of simulations, in terms of e and M developed from the transcendental Kepler equation, are encouraging, giving realistic values for the elliptical approximation of the vertical deformation due to groundwater change. Finally, we have applied the algorithm to modeling of groundwater in southern California.

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“…4 Multiple interferograms created over an area of known wastewater injection in Oklahoma ( Figure 15). 5 This is the number of synthetic-aperture radar (SAR) acquisitions, there were more interferograms used in the time series. 6 Time series of interferograms over Alexandria, VA ( Figure 13).…”

Section: Insar Processingmentioning

confidence: 99%

An Incomplete Inventory of Suspected Human-Induced Surface Deformation in North America Detected by Satellite Interferometric Synthetic-Aperture Radar

2017

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Abstract:We used satellite interferometric synthetic-aperture radar (InSAR) data to document ground deformation across North America suspected to be caused by human activities. We showed that anthropogenic deformation can be measured from space across the continent and thus satellite observations should be collected routinely to characterize this deformation. We included results from the literature as well as new analysis of more than 5000 interferograms from the European Remote Sensing (ERS) satellite, Envisat, the Advanced Land Observing Satellite (ALOS), and other satellites, collectively spanning the period 1992-2015. This compilation, while not complete in terms of spatial or temporal coverage nor uniform in quality over the region, contains 263 different areas of likely anthropogenic ground deformation, including 65 that were previously unreported. The sources can be attributed to groundwater extraction (50%), geothermal sites (6%), hydrocarbon production (20%), mining (21%), and other sources (3%) such as lake level changes driven by human activities and tunneling. In a few areas, the source of deformation is ambiguous. We found at least 80 global positioning system (GPS) stations within 20 km of of these areas that could be contaminated by the anthropogenic deformation. At sites where we performed a full time series analysis, we found a mix of steady and time-variable deformation rates. For example, at the East Mesa Geothermal Field in California, we found an area that changed from subsidence to uplift around 2006, even though publicly available records of pumping and injection showed no change during that time. We illustrate selected non-detections from wastewater injection in Oklahoma and eastern Texas, where we found that the detection threshold with available data is >0.5 cm/yr. This places into doubt previous results claiming detection below this threshold in eastern Texas. However, we found likely injection-induced uplift in a different area of eastern Texas at rates in excess of −2 cm/yr. We encourage others to expand the database in space and time in the supplemental material.

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Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles

Cited by 107 publications

References 62 publications

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

An Elliptical Model for Deformation Due to Groundwater Fluctuations

An Incomplete Inventory of Suspected Human-Induced Surface Deformation in North America Detected by Satellite Interferometric Synthetic-Aperture Radar

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