Publications
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Real-time forecasting of the April 11, 2012 Sumatra tsunami Real-time forecasting of the April 11, 2012 Sumatra tsunami
The April 11, 2012, magnitude 8.6 earthquake off the northern coast of Sumatra generated a tsunami that was recorded at sea-level stations as far as 4800 km from the epicenter and at four ocean bottom pressure sensors (DARTs) in the Indian Ocean. The governments of India, Indonesia, Sri Lanka, Thailand, and Maldives issued tsunami warnings for their coastlines. The United States' Pacific...
Authors
Dailin Wang, Nathan C. Becker, David Walsh, Gerard J. Fryer, Stuart A. Weinstein, Charles S. McCreery
Uncovering the nonadiabatic response of geosynchronous electrons to geomagnetic disturbance Uncovering the nonadiabatic response of geosynchronous electrons to geomagnetic disturbance
We describe an energy spectrum method for scaling electron integral flux, which is measured at a constant energy, to phase space density at a constant value of the first adiabatic invariant which removes much of the variation due to reversible adiabatic effects. Applying this method to nearly a solar cycle (1995 - 2006) of geosynchronous electron integral flux (E>2.0MeV) from the GOES...
Authors
Jennifer Gannon, Scot R. Elkington, Terrance G. Onsager
Directivity models produced for the Next Generation Attenuation West 2 (NGA-West 2) project Directivity models produced for the Next Generation Attenuation West 2 (NGA-West 2) project
Five new directivity models are being developed for the NGA-West 2 project. All are based on the NGA-West 2 data base, which is considerably expanded from the original NGA-West data base, containing about 3,000 more records from earthquakes having finite-fault rupture models. All of the new directivity models have parameters based on fault dimension in km, not normalized fault dimension...
Authors
Paul A. Spudich, Jennie Watson-Lamprey, Paul G. Somerville, Jeff Bayless, Shrey Shahi, Jack W. Baker, Badie Rowshandel, Brian Chiou
Design and implementation of a structural health monitoring and alerting system for hospital buildings in the United States Design and implementation of a structural health monitoring and alerting system for hospital buildings in the United States
This paper describes the current progress in the development of a structural health monitoring and alerting system to meet the needs of the U.S. Department of Veterans Affairs to monitor hospital buildings instrumented in high and very high seismic hazard regions in the U.S. The system, using the measured vibration data, is primarily designed for post-earthquake condition assessment of...
Authors
Hasan S. Ulusoy, Erol Kalkan, Jon Peter B. Fletcher, Paul A. Friberg, W. K. Leith, Krishna Banga
An Automated Cropland Classification Algorithm (ACCA) for Tajikistan by combining Landsat, MODIS, and secondary data An Automated Cropland Classification Algorithm (ACCA) for Tajikistan by combining Landsat, MODIS, and secondary data
The overarching goal of this research was to develop and demonstrate an automated Cropland Classification Algorithm (ACCA) that will rapidly, routinely, and accurately classify agricultural cropland extent, areas, and characteristics (e.g., irrigated vs. rainfed) over large areas such as a country or a region through combination of multi-sensor remote sensing and secondary data. In this...
Authors
Prasad S. Thenkabail, Zhuoting Wu
Use of expert judgment elicitation to estimate seismic vulnerability of selected building types Use of expert judgment elicitation to estimate seismic vulnerability of selected building types
Pooling engineering input on earthquake building vulnerability through an expert judgment elicitation process requires careful deliberation. This article provides an overview of expert judgment procedures including the Delphi approach and the Cooke performance-based method to estimate the seismic vulnerability of a building category.
Authors
K. S. Jaiswal, W. Aspinall, D. Perkins, D. Wald, K.A. Porter
Mauna Loa--history, hazards and risk of living with the world's largest volcano Mauna Loa--history, hazards and risk of living with the world's largest volcano
Mauna Loa on the Island Hawaiʻi is the world’s largest volcano. People residing on its flanks face many hazards that come with living on or near an active volcano, including lava flows, explosive eruptions, volcanic smog, damaging earthquakes, and local tsunami (giant seawaves). The County of Hawaiʻi (Island of Hawaiʻi) is the fastest growing County in the State of Hawaii. Its expanding...
Authors
Frank A. Trusdell
Trimming the UCERF2 hazard logic tree Trimming the UCERF2 hazard logic tree
The Uniform California Earthquake Rupture Forecast 2 (UCERF2) is a fully time‐dependent earthquake rupture forecast developed with sponsorship of the California Earthquake Authority (Working Group on California Earthquake Probabilities [WGCEP], 2007; Field et al., 2009). UCERF2 contains 480 logic‐tree branches reflecting choices among nine modeling uncertainties in the earthquake rate...
Authors
Keith A. Porter, Edward H. Field, Kevin Milner
The ChemCam Instrument Suite on the Mars Science Laboratory (MSL) Rover: Science objectives and mast unit description The ChemCam Instrument Suite on the Mars Science Laboratory (MSL) Rover: Science objectives and mast unit description
ChemCam is a remote sensing instrument suite on board the "Curiosity" rover (NASA) that uses Laser-Induced Breakdown Spectroscopy (LIBS) to provide the elemental composition of soils and rocks at the surface of Mars from a distance of 1.3 to 7 m, and a telescopic imager to return high resolution context and micro-images at distances greater than 1.16 m. We describe five analytical...
Authors
S. Maurice, R. C. Wiens, M. Saccoccio, B. Barraclough, O. Gasnault, O. Forni, N. Mangold, D. Baratoux, S. Bender, G. Berger, J. Bernardin, M. Berthe, N. Bridges, D. Blaney, M. Bouye, P. Cais, B. Clark, S. Clegg, A. Cousin, D. Cremers, A. Cros, L. DeFlores, C. Derycke, B. Dingler, G. Dromart, B. Dubois, M. Dupieux, E. Durand, L. d’Uston, C. Fabre, B. Faure, A. Gaboriaud, T. Gharsa, Kenneth E. Herkenhoff, E. Kan, L. Kirkland, D. Kouach, J.-L. Lacour, Y. Langevin, J. Lasue, S. Le Mouélic, M. Lescure, E. Lewin, D. Limonadi, G. Manhes, P. Mauchien, C. McKay, P.-Y. Meslin, Y. Michel, E. Miller, Horton E. Newsom, G. Orttner, A. Paillet, L. Pares, Y. Parot, R. Pérez, P. Pinet, F. Poitrasson, B. Quertier, B. Salle, Christophe Sotin, V. Sautter, H. Seran, J.J. Simmonds, J.-B. Sirven, R. Stiglich, N. Striebig, J.-J. Thocaven, M.J. Toplis, D. Vaniman
Problem of the Love‐Gannon relation between the asymmetric disturbance field and Dst Problem of the Love‐Gannon relation between the asymmetric disturbance field and Dst
Love and Gannon (2009) discovered that statistically, over a fifty year period the difference in the dawn and dusk disturbance‐field H component at low latitudes (hourly averaged) is linearly proportional to Dst. If the difference is designated by δDD in units of nT/RE, then the Love‐Gannon (L‐G) relation is δDD = −0.2 Dst. At any time departures from the relation can be large...
Authors
G. L. Siscoe, Jeffrey J. Love, J.L. Gannon
Estimating rate uncertainty with maximum likelihood: differences between power-law and flicker–random-walk models Estimating rate uncertainty with maximum likelihood: differences between power-law and flicker–random-walk models
Recent studies have documented that global positioning system (GPS) time series of position estimates have temporal correlations which have been modeled as a combination of power-law and white noise processes. When estimating quantities such as a constant rate from GPS time series data, the estimated uncertainties on these quantities are more realistic when using a noise model that...
Authors
John O. Langbein
Large-area landslide detection and monitoring with ALOS/PALSAR imagery data over Northern California and Southern Oregon, USA Large-area landslide detection and monitoring with ALOS/PALSAR imagery data over Northern California and Southern Oregon, USA
Multi-temporal ALOS/PALSAR images are used to automatically investigate landslide activity over an area of ~ 200 km by ~ 350 km in northern California and southern Oregon. Interferometric synthetic aperture radar (InSAR) deformation images, InSAR coherence maps, SAR backscattering intensity images, and a DEM gradient map are combined to detect active landslides by setting individual...
Authors
Chaoying Zhao, Zhong Lu, Qin Zhang, Juan de la Fuente