Richard Strelitz

Los Alamos National Laboratory

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Sean Williams

Tufts University

Mathew Maltrud

Los Alamos National Laboratory

Bernd Hamann

University of California, Davis

Mark Petersen

Los Alamos National Laboratory

Matthew Hecht

Los Alamos National Laboratory

James Ahrens

Los Alamos National Laboratory

Mark W. Hlawitschka

Johannes Kepler University of Linz

Mario Hlawitschka

Leipzig University of Applied Sciences

P. E. Malin

Applied Spectral Imaging (United States)

Y. Keshet

Duke University

Cooperative Institutions

Los Alamos National Laboratory

University of California, Davis

University of Kaiserslautern

Leipzig University of Applied Sciences

Leipzig University

Lawrence Berkeley National Laboratory

University of California System

Duke University

Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

University of Auckland

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Possible tilt phenomena observed as water level anomalies along the Los Angeles aqueduct

Geophysical Research Letters (1981)

P. C. Leary P. E. Malin Richard Strelitz Thomas L. Henyey

Water levels in the Los Angeles Aqueduct in southern California fluctuate in a manner that are not easily attributable to normal aqueduct operations. Simple hydraulics suggests that large scale earth tilt can register as water level anomalies with a sensitivity of about .01 ft/microradian. Two aqueduct anomalies which coincide spatially and temporally with independently observed deformational phenomena are used to explore this suggestion.

Aqueduct

Tiltmeter

Hydraulics

10.1029/gl008i003p00225

Cite

Citations (6)

Integral transforms, data compression, and automatic analysis of seismic sections

IEEE Transactions on Geoscience and Remote Sensing (1990)

Richard Strelitz Y. Keshet

It is shown that seismic sections contain 10/sup 5/ times more data than is needed to fully describe a completely interpreted section. Three ways of reducing the size of a data set are suggested: mapping into subsets of smaller dimension; normalization providing a reduction factor of four or more; and conversion into zero crossings, further reducing the data by a factor of 20. If combined, these methods can reduce the data set by a factor of 100 or more and may also improve the S/N (signal/noise) of the data and their effective dynamic range. In implementing these methods, two families of transforms that are designed to extract the information from the data (integral and morphological transforms) are introduced. Interpretation by visual inspection is more of a pattern classification rather than quantified analysis of the data. Ways to identify such patterns using clustering algorithms are suggested.< >

Normalization

Data Reduction

Data set

10.1109/36.62614

Cite

Citations (4)

Visualization and Analysis of Eddies in a Global Ocean Simulation

Computer Graphics Forum (2011)

Sean Williams Matthew Hecht Mark Petersen Richard Strelitz Mathew Maltrud

Abstract We present analysis and visualization of flow data from a high‐resolution simulation of the dynamical behavior of the global ocean. Of particular scientific interest are coherent vortical features called mesoscale eddies. We first extract high‐vorticity features using a metric from the oceanography community called the Okubo‐Weiss parameter. We then use a new circularity criterion to differentiate eddies from other non‐eddy features like meanders in strong background currents. From these data, we generate visualizations showing the three‐dimensional structure and distribution of ocean eddies. Additionally, the characteristics of each eddy are recorded to form an eddy census that can be used to investigate correlations among variables such as eddy thickness, depth, and location. From these analyses, we gain insight into the role eddies play in large‐scale ocean circulation.

Eddy

10.1111/j.1467-8659.2011.01948.x

Cite

Citations (48)

Stress Amplification by Weak Inclusions and the Source of Deep Moonquakes

LPI (1979)

Richard Strelitz

Source

Cite

Citations (0)

The Interpretation of Moment Tensor Inversions

Springer eBooks (1981)

Richard Strelitz

Seismogram

Generality

10.1007/978-94-009-8531-5_11

Cite

Citations (2)

Moment tensor inversions and source models

Geophysical Journal International (1978)

Richard Strelitz

The use of a moment tensor formulation in source mechanism inversions is becoming more widespread. However, this method does not yield results that correspond to a double-couple source, which is still the preferred source model. This is because the double couple is characterized by extra constraints on the general symmetric moment tensor. A method is presented of imposing these non-linear constraints while retaining the linear nature of the inversion. An application of this result shows (1) that the double-couple model fits the body-wave data as well as more general models if one explicitly considers the fewer number of free parameters in the double couple and (2) that the principal axes of the moment tensor of the unconstrained model do not necessarily correspond to the P and T axes of the double couple.

Moment tensor

10.1111/j.1365-246x.1978.tb04236.x

Cite

Citations (58)

The Source of Deep Moonquakes

Eos (1979)

Richard Strelitz

Source

Cite

Citations (0)

Seismic return motion — Comments

Physics of The Earth and Planetary Interiors (1977)

Richard Strelitz

10.1016/0031-9201(77)90170-4

Cite

Citations (1)

The September 5, 1970 Sea of Okhotsk Earthquake: A multiple event with evidence of triggering

Geophysical Research Letters (1975)

Richard Strelitz

The September 5, 1970 Sea of Okhotsk earthquake consisted of two possibly causally related but dissimilar events: a small (Mag 4.5) event at the hypocenter given by the International Seismologic Centre (52.28 N, 151.49 E, 560 km) followed 5.16±.06 seconds later by a larger (Mag 5.7) event almost at the same epicenter but 23.0±1 km deeper. The fault planes and the principal stress axes of the two events are significantly different; furthermore, the second event does not lie on either of the nodal planes of the first event. We interpret this as a possible triggering of the second event by the smaller first event and not as a change in direction of rupture propagation during a single continuous faulting episode.

Hypocenter

Epicenter

Fault plane

10.1029/gl002i004p00124

Cite

Citations (22)

Choosing the ‘best’ double couple from a moment-tensor inversion

Geophysical Journal International (1989)

Richard Strelitz

General moment-tensor solutions contain double couples, compensated linear vector dipoles (CLVD's) and isotropic sources. Since double-couple solutions are considered to be standard, it is important to find the best double-couple solution that is consistent with the original solution. It is proved that for a number of reasonable measures of fit, the best double couple is the one formed by removing a CLVD source with a magnitude of the intermediate non-zero eigenvalue. It is also shown that mixtures of double couple and CLVD's may result from near-source changes in rigidity.

Moment tensor

Rigidity (electromagnetism)

10.1111/j.1365-246x.1989.tb02060.x

Cite

Citations (16)