David Wilson
David Wilson is the director of the Global Seismographic Network.
Science and Products
Filter Total Items: 48
Detection and characterization of pulses in broadband seismometers
Pulsing - caused either by mechanical or electrical glitches, or by microtilt local to a seismometer - can significantly compromise the long‐period noise performance of broadband seismometers. High‐fidelity long‐period recordings are needed for accurate calculation of quantities such as moment tensors, fault‐slip models, and normal‐mode measurements. Such pulses have long been recognized in accele
Authors
David C. Wilson, Adam T. Ringler, Charles R. Hutt
Repeatability of testing a small broadband sensor in the Albuquerque Seismological Laboratory Underground Vault
Variability in seismic instrumentation performance plays a fundamental role in our ability to carry out experiments in observational seismology. Many such experiments rely on the assumed performance of various seismic sensors as well as on methods to isolate the sensors from nonseismic noise sources. We look at the repeatability of estimating the self‐noise, midband sensitivity, and the relative o
Authors
Adam T. Ringler, Austin Holland, David C. Wilson
Characterizing local variability in long‐period horizontal tilt noise
Horizontal seismic data are dominated by atmospherically induced tilt noise at long periods (i.e., 30 s and greater). Tilt noise limits our ability to use horizontal data for sensitive seismological studies such as observing free earth modes. To better understand the local spatial variability of long‐period horizontal noise, we observe horizontal noise during quiet time periods in the Albuquerque
Authors
M.D. Rohde, Adam T. Ringler, Charles R. Hutt, David C. Wilson, Austin Holland, L.D Sandoval, Tyler Storm
Improvements in absolute seismometer sensitivity calibration using local earth gravity measurements
The ability to determine both absolute and relative seismic amplitudes is fundamentally limited by the accuracy and precision with which scientists are able to calibrate seismometer sensitivities and characterize their response. Currently, across the Global Seismic Network (GSN), errors in midband sensitivity exceed 3% at the 95% confidence interval and are the least‐constrained response parameter
Authors
Robert E. Anthony, Adam T. Ringler, David C. Wilson
Noise reduction in long‐period seismograms by way of array summing
Long‐period (>100 s period) seismic data can often be dominated by instrumental noise as well as local site noise. When multiple collocated sensors are installed at a single site, it is possible to improve the overall station noise levels by applying stacking methods to their traces. We look at the noise reduction in long‐period seismic data by applying the time–frequency phase‐weighted stacking
Authors
Adam T. Ringler, David C. Wilson, Tyler Storm, Benjamin T. Marshall, Charles R. Hutt, Austin Holland
Potential improvements in horizontal very broadband seismic data in the IRIS/USGS component of the Global Seismic Network
The Streckeisen STS‐1 has been the primary vault‐type seismometer used in the over‐150‐station Global Seismographic Network (GSN). This sensor has long been known for its outstanding vertical, very long‐period (e.g., >100 s period), and low‐noise performance, although the horizontal long‐period noise performance is less well known. The STS‐1 is a limited, important resource, because it is no long
Authors
Adam T. Ringler, J.M. Steim, T Zandt, Charles R. Hutt, David C. Wilson, Tyler Storm
Upgrade of the New China Digital Seismograph Network
No abstract available.
Authors
D. Anderson, J. Anderson, D. Ford, Lind S. Gee, G. Gyure, Charles R. Hutt, E. Kromer, B. Marshall, K. Persefield, Adam T. Ringler, M. Sharratt, Tyler Storm, David C. Wilson, D. Yang, Z. Zheng
Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma
The sharp increase in seismicity over a broad region of central Oklahoma has raised concerns regarding the source of the activity and its potential hazard to local communities and energy-industry infrastructure. Efforts to monitor and characterize the earthquake sequences in central Oklahoma are reviewed. Since early 2010, numerous organizations have deployed temporary portable seismic stations in
Authors
Daniel E. McNamara, Justin L. Rubinstein, Emma Myers, Gregory M. Smoczyk, Harley M. Benz, Robert Williams, Gavin P. Hayes, David C. Wilson, Robert B. Herrmann, Nicole D McMahon, R.C. Aster, E. Bergman, Austin Holland, Paul S. Earle
The data quality analyzer: a quality control program for seismic data
The U.S. Geological Survey's Albuquerque Seismological Laboratory (ASL) has several initiatives underway to enhance and track the quality of data produced from ASL seismic stations and to improve communication about data problems to the user community. The Data Quality Analyzer (DQA) is one such development and is designed to characterize seismic station data quality in a quantitative and automate
Authors
Adam T. Ringler, M.T. Hagerty, James F. Holland, A. Gonzales, Lind S. Gee, J.D. Edwards, David C. Wilson, Adam Baker
Small explosion from new vent at Kilauea’s summit
At 0258 Hawaii‐Aleutian Standard Time (HST) on 19 March 2008, a small explosion scattered altered and fresh lithic debris across a 40‐hectare area at the summit of Kilauea volcano. This explosion, the first recorded there since 1924, issued from a vent about 35 meters wide along the east wall of Halema'uma'u Crater. Ballistic fragments—the largest measuring nearly 1 meter across—were propelled upw
Authors
David C. Wilson, Tamar Elias, T. Orr, Matthew R. Patrick, Jeff Sutton, Don Swanson
Cyclic spattering, seismic tremor, and surface fluctuation within a perched lava channel, Kilauea Volcano
In late 2007, a perched lava channel, built up to 45 m above the preexisting surface, developed during the ongoing eruption near Pu‘u ‘Ō‘ō cone on Kīlauea Volcano’s east rift zone. The lava channel was segmented into four pools extending over a total of 1.4 km. From late October to mid-December, a cyclic behavior, consisting of steady lava level rise terminated by vigorous spattering and an abrupt
Authors
Matthew R. Patrick, Tim R. Orr, David C. Wilson, David C. Dow, R. Freeman
New episodes of volcanism at Kilauea Volcano, Hawaii
Mid‐2007 was a time of intense activity at Kilauea Volcano, Hawaii (see Figure 1). In June, the long‐lived Pu'u 'Ō'ō—Kupaianaha eruption, a dual‐vent system along the east rift zone (ERZ) that has been erupting since 1983 [Heliker et al., 2003], paused due to the outbreak of a new vent farther up the rift (see Figure 2). The Pu'u 'Ō'ō vent collapsed following that activity, and the resulting reorg
Authors
Michael P. Poland, Asta Miklius, Tim R. Orr, J. Sutton, Carl Thornber, David C. Wilson
Science and Products
Filter Total Items: 48
Detection and characterization of pulses in broadband seismometers
Pulsing - caused either by mechanical or electrical glitches, or by microtilt local to a seismometer - can significantly compromise the long‐period noise performance of broadband seismometers. High‐fidelity long‐period recordings are needed for accurate calculation of quantities such as moment tensors, fault‐slip models, and normal‐mode measurements. Such pulses have long been recognized in accele
Authors
David C. Wilson, Adam T. Ringler, Charles R. Hutt
Repeatability of testing a small broadband sensor in the Albuquerque Seismological Laboratory Underground Vault
Variability in seismic instrumentation performance plays a fundamental role in our ability to carry out experiments in observational seismology. Many such experiments rely on the assumed performance of various seismic sensors as well as on methods to isolate the sensors from nonseismic noise sources. We look at the repeatability of estimating the self‐noise, midband sensitivity, and the relative o
Authors
Adam T. Ringler, Austin Holland, David C. Wilson
Characterizing local variability in long‐period horizontal tilt noise
Horizontal seismic data are dominated by atmospherically induced tilt noise at long periods (i.e., 30 s and greater). Tilt noise limits our ability to use horizontal data for sensitive seismological studies such as observing free earth modes. To better understand the local spatial variability of long‐period horizontal noise, we observe horizontal noise during quiet time periods in the Albuquerque
Authors
M.D. Rohde, Adam T. Ringler, Charles R. Hutt, David C. Wilson, Austin Holland, L.D Sandoval, Tyler Storm
Improvements in absolute seismometer sensitivity calibration using local earth gravity measurements
The ability to determine both absolute and relative seismic amplitudes is fundamentally limited by the accuracy and precision with which scientists are able to calibrate seismometer sensitivities and characterize their response. Currently, across the Global Seismic Network (GSN), errors in midband sensitivity exceed 3% at the 95% confidence interval and are the least‐constrained response parameter
Authors
Robert E. Anthony, Adam T. Ringler, David C. Wilson
Noise reduction in long‐period seismograms by way of array summing
Long‐period (>100 s period) seismic data can often be dominated by instrumental noise as well as local site noise. When multiple collocated sensors are installed at a single site, it is possible to improve the overall station noise levels by applying stacking methods to their traces. We look at the noise reduction in long‐period seismic data by applying the time–frequency phase‐weighted stacking
Authors
Adam T. Ringler, David C. Wilson, Tyler Storm, Benjamin T. Marshall, Charles R. Hutt, Austin Holland
Potential improvements in horizontal very broadband seismic data in the IRIS/USGS component of the Global Seismic Network
The Streckeisen STS‐1 has been the primary vault‐type seismometer used in the over‐150‐station Global Seismographic Network (GSN). This sensor has long been known for its outstanding vertical, very long‐period (e.g., >100 s period), and low‐noise performance, although the horizontal long‐period noise performance is less well known. The STS‐1 is a limited, important resource, because it is no long
Authors
Adam T. Ringler, J.M. Steim, T Zandt, Charles R. Hutt, David C. Wilson, Tyler Storm
Upgrade of the New China Digital Seismograph Network
No abstract available.
Authors
D. Anderson, J. Anderson, D. Ford, Lind S. Gee, G. Gyure, Charles R. Hutt, E. Kromer, B. Marshall, K. Persefield, Adam T. Ringler, M. Sharratt, Tyler Storm, David C. Wilson, D. Yang, Z. Zheng
Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma
The sharp increase in seismicity over a broad region of central Oklahoma has raised concerns regarding the source of the activity and its potential hazard to local communities and energy-industry infrastructure. Efforts to monitor and characterize the earthquake sequences in central Oklahoma are reviewed. Since early 2010, numerous organizations have deployed temporary portable seismic stations in
Authors
Daniel E. McNamara, Justin L. Rubinstein, Emma Myers, Gregory M. Smoczyk, Harley M. Benz, Robert Williams, Gavin P. Hayes, David C. Wilson, Robert B. Herrmann, Nicole D McMahon, R.C. Aster, E. Bergman, Austin Holland, Paul S. Earle
The data quality analyzer: a quality control program for seismic data
The U.S. Geological Survey's Albuquerque Seismological Laboratory (ASL) has several initiatives underway to enhance and track the quality of data produced from ASL seismic stations and to improve communication about data problems to the user community. The Data Quality Analyzer (DQA) is one such development and is designed to characterize seismic station data quality in a quantitative and automate
Authors
Adam T. Ringler, M.T. Hagerty, James F. Holland, A. Gonzales, Lind S. Gee, J.D. Edwards, David C. Wilson, Adam Baker
Small explosion from new vent at Kilauea’s summit
At 0258 Hawaii‐Aleutian Standard Time (HST) on 19 March 2008, a small explosion scattered altered and fresh lithic debris across a 40‐hectare area at the summit of Kilauea volcano. This explosion, the first recorded there since 1924, issued from a vent about 35 meters wide along the east wall of Halema'uma'u Crater. Ballistic fragments—the largest measuring nearly 1 meter across—were propelled upw
Authors
David C. Wilson, Tamar Elias, T. Orr, Matthew R. Patrick, Jeff Sutton, Don Swanson
Cyclic spattering, seismic tremor, and surface fluctuation within a perched lava channel, Kilauea Volcano
In late 2007, a perched lava channel, built up to 45 m above the preexisting surface, developed during the ongoing eruption near Pu‘u ‘Ō‘ō cone on Kīlauea Volcano’s east rift zone. The lava channel was segmented into four pools extending over a total of 1.4 km. From late October to mid-December, a cyclic behavior, consisting of steady lava level rise terminated by vigorous spattering and an abrupt
Authors
Matthew R. Patrick, Tim R. Orr, David C. Wilson, David C. Dow, R. Freeman
New episodes of volcanism at Kilauea Volcano, Hawaii
Mid‐2007 was a time of intense activity at Kilauea Volcano, Hawaii (see Figure 1). In June, the long‐lived Pu'u 'Ō'ō—Kupaianaha eruption, a dual‐vent system along the east rift zone (ERZ) that has been erupting since 1983 [Heliker et al., 2003], paused due to the outbreak of a new vent farther up the rift (see Figure 2). The Pu'u 'Ō'ō vent collapsed following that activity, and the resulting reorg
Authors
Michael P. Poland, Asta Miklius, Tim R. Orr, J. Sutton, Carl Thornber, David C. Wilson