A Catalog of Regional Moment Tensors in Utah from 1998 to 2011

Whidden, Katherine M.; Pankow, K. L.

doi:10.1785/0220120046

Cited by 28 publications

(16 citation statements)

References 40 publications

(42 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also attempted to invert the waveforms for a full moment tensor with six degrees of freedom. We found an isotropic component accounting for 33% of the moment; however, the F test statistic for the isotropic component is significant at a confidence level of only 57%, much lower than the 95% value that is used to accept an apparent isotropic component as genuine (e.g., Whidden & Pankow, ).…”

Section: Absolute Earthquake Locations and Magnitudescontrasting

confidence: 69%

The 2017–2018 Maple Creek Earthquake Sequence in Yellowstone National Park, USA

Pang

Koper

Hale

et al. 2019

Geophysical Research Letters

View full text Add to dashboard Cite

We explore the detailed spatiotemporal evolution of 3,345 earthquakes that occurred near Maple Creek, Yellowstone, for the time period of 12 June 2017 to 13 March 2018. We generate high‐accuracy relocations and near source VP/VS ratios using 4.4 million P wave and S wave differential travel times derived from waveform cross correlation. The hypocenters can be subdivided geographically into two major subpopulations: a northern cluster with planar structures striking mainly NW‐SE and a southern cluster with planar structures striking mainly E‐W. We observe VP/VS ratios of 1.39–1.66 in the northern cluster and a steady ratio of 1.50 in the southern cluster, suggesting the presence of CO2‐filled cracks. We interpret the northern earthquake cluster primarily as long‐lived aftershocks of the 1959 Mw 7.2 Hebgen Lake earthquake but with some influence of magmatic fluids. We interpret the southern earthquake cluster as a more classic, swarm‐like sequence induced primarily by the migration of magmatic fluids.

show abstract

Section: Absolute Earthquake Locations and Magnitudescontrasting

confidence: 69%

The 2017–2018 Maple Creek Earthquake Sequence in Yellowstone National Park, USA

Pang

Koper

Hale

et al. 2019

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…We followed the approach of Ekström and Stark [], in which three‐component ground motion time histories are inverted for a time‐varying force parameterized as a sequence of 100 partially overlapping triangles of half‐width 1 s, which in total integrate to zero to satisfy zero motion before and after the slide. The Green's functions are calculated [ Herrmann , ] for a shallow source in the simple layered velocity model WUS [ Herrmann et al ., ], which Whidden and Pankow [] found to be suitable for moment tensor analysis in Utah. Figure a shows the results of the inversion for the landslide force history.…”

Section: Broadband Seismoacoustic Signalsmentioning

confidence: 99%

Dynamics of the Bingham Canyon rock avalanches (Utah, USA) resolved from topographic, seismic, and infrasound data

et al. 2017

View full text Add to dashboard Cite

The 2013 Bingham Canyon Mine rock avalanches represent one of the largest cumulative landslide events in recorded U.S. history and provide a unique opportunity to test remote analysis techniques for landslide characterization. Here we combine aerial photogrammetry surveying, topographic reconstruction, numerical runout modeling, and analysis of broadband seismic and infrasound data to extract salient details of the dynamics and evolution of the multiphase landslide event. Our results reveal a cumulative intact rock source volume of 52 Mm3, which mobilized in two main rock avalanche phases separated by 1.5 h. We estimate that the first rock avalanche had 1.5–2 times greater volume than the second. Each failure initiated by sliding along a gently dipping (21°), highly persistent basal fault before transitioning to a rock avalanche and spilling into the inner pit. The trajectory and duration of the two rock avalanches were reconstructed using runout modeling and independent force history inversion of intermediate‐period (10–50 s) seismic data. Intermediate‐ and shorter‐period (1–50 s) seismic data were sensitive to intervals of mass redirection and constrained finer details of the individual slide dynamics. Back projecting short‐period (0.2–1 s) seismic energy, we located the two rock avalanches within 2 and 4 km of the mine. Further analysis of infrasound and seismic data revealed that the cumulative event included an additional 11 smaller landslides (volumes ~104–105 m3) and that a trailing signal following the second rock avalanche may result from an air‐coupled Rayleigh wave. Our results demonstrate new and refined techniques for detailed remote characterization of the dynamics and evolution of large landslides.

show abstract

“…Systematic full moment tensor inversion of 44 seismic events that occurred in the Utah region during the period of 1998–2011 reinforced the dominant collapse nature of the 6 August 2007 seismic event [ Whidden and Pankow , ]. Although significantly isotropic, the observation of Love waves suggests that there was a small double‐couple component to the CCM event [ Ford et al ., ; Dreger et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Changes in mining‐induced seismicity before and after the 2007 Crandall Canyon Mine collapse

et al. 2014

View full text Add to dashboard Cite

On 6 August 2007, the Crandall Canyon Mine in central Utah experienced a major collapse that was recorded as an M w 4.1 seismic event. Application of waveform cross-correlation detection techniques to data recorded at permanent seismic stations located within~30 km of the mine has resulted in the discovery of 1494 previously unknown microseismic events related to the collapse. These events occurred between 26 July 2007 and 19 August 2007 and were detected with a magnitude threshold of completeness of 0.0, about 1.6 magnitude units smaller than the threshold associated with conventional techniques. Relative locations for the events were determined using a double-difference approach that incorporated absolute and differential arrival times. Absolute locations were determined using ground-truth reported in mine logbooks. Lineations apparent in the newly detected events have strikes similar to those of known vertical joints in the mine region, which may have played a role in the collapse. Prior to the collapse, seismicity occurred mostly in close proximity to active mining, though several distinct seismogenic hot spots within the mine were also apparent. In the 48 h before the collapse, changes in b value and event locations were observed. The collapse appears to have occurred when the migrating seismicity associated with direct mining activity intersected one of the areas identified as a seismic hot spot. Following the collapse, b values decreased and seismicity clustered farther to the east.

show abstract

A Catalog of Regional Moment Tensors in Utah from 1998 to 2011

Cited by 28 publications

References 40 publications

The 2017–2018 Maple Creek Earthquake Sequence in Yellowstone National Park, USA

The 2017–2018 Maple Creek Earthquake Sequence in Yellowstone National Park, USA

Dynamics of the Bingham Canyon rock avalanches (Utah, USA) resolved from topographic, seismic, and infrasound data

Changes in mining‐induced seismicity before and after the 2007 Crandall Canyon Mine collapse

Contact Info

Product

Resources

About