A5024737159- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Geological and Tectonic Studies in Latin America
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Atmospheric Ozone and Climate
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Spaceflight effects on biology
- Disaster Management and Resilience
- Botany and Geology in Latin America and Caribbean
- Geochemistry and Geologic Mapping
- Flood Risk Assessment and Management
- Data-Driven Disease Surveillance
- Atmospheric chemistry and aerosols
- Reservoir Engineering and Simulation Methods
- Geophysics and Sensor Technology
- bioluminescence and chemiluminescence research
- Air Quality Monitoring and Forecasting
Instituto Nicaragüense de Estudios Territoriales
2009-2024
Universidad Politécnica de Madrid
2010
Institute of Air Handling and Refrigeration
1996
University of Potsdam
1992
We present the first regional surface velocity field for Central America, showing crustal response to interaction of Cocos and Caribbean plates. Elastic half‐space models interseismic strain accumulation on dipping subduction plate boundary fit GPS data well show offshore beneath Nicoya Osa peninsulas in Costa Rica but not Nicaragua. Since large zone earthquakes occur Nicaragua, we suggest that locking Nicaragua some other parts America occurs is mainly shallow, <20 km depth, too far be...
Abstract A catastrophic lahar began on 30 October 1998, as hurricane precipitation triggered a small flank collapse of Casita volcano, complex and probably dormant stratovolcano. The initial rockslide‐debris avalanche evolved the to yield watery debris flood with sediment concentration less than 60 per cent by volume at base volcano. Within 2·5 km, however, flow entrained (bulked) enough transform entirely flow. flow, 6 km downstream 1·2 wide 3 m deep, killed 2500 people, nearly entire...
Attenuation structure in the Central American subduction zone was imaged using local events recorded by Tomography Under Costa Rica and Nicaragua array, a 20‐month‐long deployment (July 2004 until March 2006) of 48 seismometers that spanned fore‐arc, arc, back‐arc regions Rica. P S waveforms were inverted separately for corner frequency moment each event path‐averaged attenuation operator ( t *) event‐station pair, assuming is slightly frequency‐dependent (∝ = 0.27). Then, tomographic...
The Central American subduction zone exhibits large variations in geochemistry, downgoing plate roughness and dip, volcano locations over a short distance along the arc. Results from joint inversions for Vp , / Vs hypocenters Tomography Under Costa Rica Nicaragua (TUCAN) experiment give insight into its geometry structure. In both Nicaragua, intermediate‐depth seismic is single layer no more than 10 to 20 km thick. Tomographic images show that throughout slowest mantle P wave velocities...
Research Article| October 01, 1998 1995 eruptions of Cerro Negro volcano, Nicaragua, and risk assessment for future Brittain E. Hill; Hill 1Center Nuclear Waste Regulatory Analyses, 6220 Culebra Road, San Antonio, Texas 78238-5166 Search other works by this author on: GSW Google Scholar Charles B. Connor; Connor Mark S. Jarzemba; Jarzemba Peter C. La Femina; Femina M. Navarro; Navarro 2Instituto Nicaragüense de Estudios Territoriales, Apartado 2110, Managua, Nicaragua W. Strauch GSA Bulletin...
Seismic wide-angle measurements across the Pacific margin of Nicaragua were carried out using ocean bottom hydrophones and land stations recording marine airgun shots. The structure P-wave velocity subducting Cocos overriding Caribbean Plates determined by modelling data further constrained coincident seismic reflection, borehole gravity data.
Oblique subduction at a high rate of convergence along much the Middle America Trench results in northwest-directed trench-parallel block motion. Accommodation this motion northwest-striking dextral strike-slip faults has been postulated; however, Nicaragua such are not well developed. We suggest instead that is accommodated by bookshelf faulting includes northeast-striking left-lateral faults. present earthquake epicenter and focal mechanism data mapped fracture fault consistent with model....
Subduction alters continents several ways, including accretion, magmatic addition, mantle wedge serpentinization, and crustal differentiation. These changes affect seismic velocities, so characterizing upper plate crust establishes a baseline for composition continental growth. Teleseismic P PP arrivals from temporary deployment of broadband seismometers in Central America have been used to estimate thickness Vp/Vs ratio receiver functions image across the active arc. Crustal ranges 25 44 km...
We present new shear wave splitting data from local events in Costa Rica and Nicaragua recorded by the temporary (July 2004 to March 2006) 48‐station TUCAN broadband seismic array. Observed fast polarization directions fore arc, back arc range arc‐parallel arc‐normal over very short distances (<5 km when plotted at raypath midpoints) making direct interpretation of individual measurements terms flow tenuous, even considering variations relationship between lattice‐preferred orientation...
SKS and SKKS splitting observations are used to constrain the pattern of mantle flow in Central American subduction zone beneath Costa Rica Nicaragua. After removing effects shallow wedge anisotropy on SK ( K ) S waveforms, a best fitting model Cocos Plate deeper is determined. Fast polarization directions symmetry axis orientations both regions (as well as wedge) dominated by roughly arc‐parallel azimuths and, therefore, not consistent with sublithospheric entrained subducting or simple...
Remarkable evidence of coupling between tectonic and magmatic events emerges from investigation three earthquakes, aftershock sequences eruption Cerro Negro volcano, Nicaragua in 1999. Here, we explain this through static stress changes following Mw 5.2 earthquakes. We use focal mechanism solutions to estimate fault system geometry magnitude slip these events, which are then used calculate the change minimum horizontal principal (σ 3 ) for region Coulomb failure on optimally oriented planes....
Abstract Many of Earth's volcanoes experience well‐defined states “quiescence” and “unrest,” with unrest occasionally culminating in eruption. Some volcanoes, however, an unusually protracted (i.e., decades‐long) period noneruptive are thus categorized as “persistently restless volcanoes” (PRVs). The processes that drive persistently volcanism poorly understood, our knowledge PRVs is currently based on a small number case studies. Here we examine multidisciplinary observations the 2015...
Gas and particulate matter (PM) emissions from Masaya volcano, Nicaragua, cause substantial regional volcanic air pollution (VAP). We evaluate the suitability of low-cost SO2 PM sensors for a continuous air-quality network. The network was deployed six months in five populated areas (4-16 km crater). failed recorded erroneous values on multiple occasions, likely due to corrosion, requiring significant maintenance commitment. were found be robust but data required correction humidity....
An international team of researchers is hoping to pin down the origin and determine effects 6 years continued unrest at Nicaragua's Masaya volcano. With country's capital, Managua, close by, several million people are risk if a large, explosive eruption were occur. distinctive not only for its basaltic eruptions past, but also postcaldera activity. Combined geophysical geochemical surveys improving understanding volcanic activity there, new techniques providing exciting inroads into...
Over the past decade, remote sensing has been used increasingly in study of active volcanoes and their associated hazards. Ground‐based techniques, such as those aimed at analysis volcanic gases or fumarole temperatures, are now part routine monitoring operations with additional satellite‐based methods. It is likely that use systems will be most beneficial for volcano developing country regions areas. In situations, an operational real‐time satellite system could provide rapid assessment...
We use measurements at 35 GPS stations in northern Central America and 25 seismometers teleseismic distances to estimate the distribution of slip, source time function Coulomb stress changes Mw = 7.3 2009 May 28, Swan Islands fault earthquake. This event, largest region for several decades, ruptured offshore continuation seismically hazardous Motagua Guatemala, site destructive Ms 7.5 earthquake 1976. Measured offsets range from 308 millimetres a campaign Honduras 6 five continuous sites El...