A5068314003- earthquake and tectonic studies
- Geophysics and Gravity Measurements
- Geological and Geochemical Analysis
- Survey Methodology and Nonresponse
- Geological and Geophysical Studies
- Landslides and related hazards
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geochemistry and Geologic Mapping
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Geological and Tectonic Studies in Latin America
- Vaccine Coverage and Hesitancy
- Data-Driven Disease Surveillance
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- CO2 Sequestration and Geologic Interactions
- Seismology and Earthquake Studies
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- Cryospheric studies and observations
- Geological and Geophysical Studies Worldwide
- Geophysical and Geoelectrical Methods
- Rock Mechanics and Modeling
United States Geological Survey
2014-2024
Sapienza University of Rome
2015-2024
Ames Research Center
2020-2022
Pacific Island Ecosystems Research Center
2022
Cascades Volcano Observatory
2019-2021
Terra
2015-2017
Counseling Center
2016
Volcano Science Center
2012-2015
Abt Global (United States)
1999-2012
Tecnologia Energia Ambiente Materiali (Italy)
2012
Abstract Calderas are collapse structures related to the emptying of magmatic reservoirs, often associated with large eruptions from long-lived systems. Understanding how magma is transferred a reservoir surface before major challenge. Here we exploit historical, archaeological and geological record Campi Flegrei caldera estimate deformation preceding Monte Nuovo eruption investigate shallow transfer. Our data suggest progressive accumulation ~1251 1536 in 4.6 ± 0.9 km deep source below...
Objective. To examine the attitudes, beliefs, and behaviors of parents whose children were underimmunized with respect to ≥2 vaccines that have recently received negative attention, compared fully immunized recommended vaccines. Design. Case-control study. Setting. A sample households participated in National Immunization Survey recontacted 2001. Main Outcome Measure. Vaccination status was assessed. Case subjects 3 (diphtheria-tetanus-pertussis or diphtheria-tetanus-acellular pertussis,...
We model the location, geometry and density of source recent geological unrest at Campi Flegrei caldera (Italy) by inverting levelling, trilateration gravity measurements collected between 1980 1995. The best fitting for 1980–84 inflation is a horizontal penny‐shaped crack with 142 to 1115 kg/m 3 . deflation period (1990–95) vertical spheroid 902 1015 These results exclude intrusion magma, indicate migration fluid from hydrothermal system as cause ground deformation consequent unrest.
We use GPS measurements and block modeling to investigate the present‐day deformation of Adriatic region, whose kinematics within Nubia‐Eurasia plate boundary zone is not well constrained remains controversial. Block allows us compute rigid‐plate angular velocities while accounting for elastic strain accumulation along block‐bounding faults. Results suggest that a microplate (Adria) southern with Nubia Aegean domain may be located Apulia Escarpment Kefallinia fault. Geodetic data alone...
Valid and reliable public health data are becoming more difficult to obtain through random-digit dial (RDD) telephone surveys. As a result, researchers evaluating different survey designs (i.e., sampling frame mode combinations) as complements or alternatives RDD. Traditionally, mail surveys of the general have been limited due lack complete households. Recent advances in electronic record keeping, however, allowed develop sample from addresses (e.g., U.S. Postal Service Delivery Sequence...
A survey sample may cover segments of the target population in proportions that do not match those itself.The differences arise, for example, from sampling fluctuations, nonresponse, or because design was able to entire population.In such situations one can often improve relation between and by adjusting weights cases so marginal totals adjusted on specified characteristics, referred as control variables, agree with corresponding population.This operation is known raking ratio estimation...
Noncoverage rates in U.S. landline-based telephone samples due to cell phone only households (i.e., with no landline but accessible by phone) and the corresponding potential for bias estimates from surveys that sample frames are growing issues. Building on some of few published studies focus this problem, a study was conducted three states (Georgia, New Mexico, Pennsylvania) as part Behavioral Risk Factor Surveillance System (BRFSS), world's largest ongoing public health survey, evaluate...
To meet challenges arising from increasing rates of noncoverage in US landline-based telephone samples due to cell-phone-only households, the Behavioral Risk Factor Surveillance System (BRFSS) expanded a traditional random digit dialing survey dual-frame landline and cell phone numbers. In 2008, adults with phones only was conducted parallel an ongoing health 18 states. The authors used optimal approach allocate into strata new weighting state-level samples. They developed logistic models...
Abstract In the last four decades, Campi Flegrei caldera has been world’s most active characterized by intense unrest episodes involving huge ground deformation and seismicity, but, at time of writing, not culminated in an eruption. We present a careful review, with new analyses interpretation, all data recent research results. deal three main problems: tentative reconstruction substructure; modelling to shed light on possible pre-eruptive scenarios; probabilistic estimation hazards from...
Time-dependent gravimetric measurements can detect subsurface processes long before magma flow leads to earthquakes or other eruption precursors. The ability of gravity mass is greatly enhanced if are analyzed and modeled with ground-deformation data. Obtaining the maximum information from microgravity studies requires careful evaluation layout network benchmarks, environmental signal, coupling between changes crustal deformation. When in system under study fast (hours weeks), as...
Precise relative gravity measurements conducted in Long Valley (California) 1982 and 1998 reveal a decrease of as much -107 +/- 6 microgals (1 microgal = 10(-8) meters per square second) centered on the uplifting resurgent dome. A positive residual change up to 64 15 was found after correcting for effects uplift water table fluctuations. Assuming point source intrusion, density intruding material is 2.7 x 10(3) 4.1 kilograms cubic meter at 95 percent confidence. The results require intrusion...
Journal Article An Evaluation of Respondent Selection Methods for Household Mail Surveys Get access Michael P. Battaglia, Battaglia Address correspondence to Battaglia; e-mail: mike_battaglia@abtassoc.com. Search other works by this author on: Oxford Academic Google Scholar W. Link, Link Martin R. Frankel, Frankel Larry Osborn, Osborn Ali H. Mokdad Public Opinion Quarterly, Volume 72, Issue 3, Fall 2008, Pages 459–469, https://doi.org/10.1093/poq/nfn026 Published: 21 August 2008
The goal of this study was to determine the needs ALS family caregivers. Utilizing a qualitative and quantitative mixed methodology known as Concept Mapping (CM), individual interviews with caregivers patients (n =19) identified 109 needs. were sorted rated by 12 caregivers, then analyzed using multidimensional scaling cluster analysis. In addition, completed SF-8 QoL measure. analysis resulted in four-cluster map, representing trajectory caregivers' needs: Stage 1: Early Coping Adjustment;...
Research Article| January 01, 2009 Uplift and magma intrusion at Long Valley caldera from InSAR gravity measurements Pietro Tizzani; Tizzani 1Consiglio Nazionale delle Ricerche (CNR) Istituto per il Rilevamento Elettromagnetico dell'Ambiente, Via Diocleziano 324, 80124 Naples, Italy, di Geofisica e Vulcanologia–Osservatorio Vesuviano, Italy Search for other works by this author on: GSW Google Scholar Maurizio Battaglia; Battaglia 2Department of Earth Sciences, University Rome "La Sapienza,"...
Abstract Analysis of microgravity and surface displacement data collected at the summit Kīlauea Volcano, Hawaii (USA), between December 2009 November 2012 suggests a net mass accumulation ~1.5 km depth beneath northeast margin Halema‘uma‘u Crater, within Caldera. Although residual gravity increases decreases are accompanied by periods uplift subsidence surface, respectively, volume change inferred from modeling interferometric synthetic aperture radar deformation can account for only small...
1) To determine the proportion of preschool children receiving immunizations from providers enrolled in Vaccines for Children (VFC) program; 2) to assess whether their immunization serve as medical home primary care; and 3) examine relationship between various provider characteristics status.Two-phase national survey consisting parent interviews verified by record check.A total 78 areas (50 states, District Columbia, 27 urban areas).Noninstitutionalized 19 35 months age 1997.None.VFC...
Research Article| December 01, 2010 Shallow magma accumulation at Kīlauea Volcano, Hawai'i, revealed by microgravity surveys Daniel J. Johnson; Johnson * *Deceased Search for other works this author on: GSW Google Scholar Albert A. Eggers; Eggers 1Geology Department, University of Puget Sound, Tacoma, Washington 98416, USA Marco Bagnardi; Bagnardi † 2Department Earth Sciences, Sapienza, Rome, Italy †Current address: Rosenstiel School Marine and Atmospheric Science, Miami, Florida 33149, USA....
We use site velocities from continuous GPS (CGPS) observations and kinematic modeling to investigate the active tectonics of Friuli/NW Slovenia area. Data 42 CGPS stations around Adriatic indicate an oblique collision, with southern Friuli moving NNW toward northern at relative speed 1.6 2.2 mm/a. using 3DMove, a three‐dimensional model tool. The consists one indenter‐shaped fault plane that approximates plate boundary. Using “fault‐parallel flow” deformation algorithm, we move hanging wall...
Abstract We studied the Yellowstone caldera geological unrest between 1977 and 2010 by investigating temporal changes in differential Interferometric Synthetic Aperture Radar (InSAR), precise spirit leveling gravity measurements. The analysis of 1992–2010 displacement time series, retrieved applying SBAS InSAR technique, allowed identification three areas deformation: (i) Mallard Lake (ML) Sour Creek (SC) resurgent domes, (ii) a region close to Northern Caldera Rim (NCR), (iii) eastern Snake...
Eruptions of Sinabung volcano, Indonesia have been ongoing since 2013. Since that time, the character eruptions has changed, from phreatic to phreatomagmatic magmatic explosive eruptions, and production a lava dome collapsed subsequent thick flow slowly ceased be active, later, new dome. As eruption progressed, event trees were constructed forecast eruptive behavior six times, with windows ranged 2 weeks 1 year: November 7–10, December 12–14, 27, 2013; January 9–10, May 13, October 7, 2014....