A5074094141- Seismic Waves and Analysis
- earthquake and tectonic studies
- Landslides and related hazards
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Earthquake Detection and Analysis
- Municipal Solid Waste Management
- Recycling and Waste Management Techniques
- Granular flow and fluidized beds
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Mineral Processing and Grinding
- Anomaly Detection Techniques and Applications
- Microplastics and Plastic Pollution
Beacon College
2024
Clarkson University
2024
Simon Fraser University
2023
Centre of Natural Hazards and Disaster Science
2019-2020
Uppsala University
2019-2020
Massey University
2015-2019
Pyroclastic density currents (PDCs) are the most lethal volcanic process on Earth. Forecasting their inundation area is essential to mitigate risk, but existing models limited by our poor understanding of dynamics. Here, we explore role evolving grain-size distribution in controlling runout common PDCs, known as block-and-ash flows (BAFs). Through a combination theory, analysis deposits and experiments natural mixtures, show that rapid changes transported BAFs result reduction pore volume...
Abstract A frequently applied amplitude source location (ASL) method is here calibrated and optimized by using active seismic sources located at the surface of a dry stream channel. The ASL produced discrepancies larger than 1.0 km laterally 500 m in depth independently determined velocity model, attenuation, site amplification factors (AFs). Sensitivity tests for input parameters show that attenuation have moderate influence on but are easy to constrain. AFs shown strongly location, their...
At approximately 09:36 UTC on 27 April 2016, a phreatic eruption occurred Whakaari Island (White Island) producing an sequence that contained multiple eruptive pulses determined to have over the first 30 min, with continuing tremor signal lasting ~ 2 h after pulsing sequence. To investigate dynamics, we used combination of cross-correlation and coherence methods acoustic data. estimate locations for pulses, seismic data were collected vent inferred through use amplitude source location...
Lahar monitoring on active volcanoes is challenging, and the ever changing environment leads to inconsistent results that hamper a warning systems ability characterize flow event properly. Therefore, more data, new methods, use of different sensors needs be tested, which could lead improvements in capabilities. Here, we present data from 3-component broadband seismometer video camera installed 3 m Lumbre channel Volcán de Colima, Mexico understand rheology differences within multiple lahar...
Abstract. Monitoring for mass flows on volcanoes can be challenging due to the ever-changing landscape along flow path, which drastically transform properties and dynamics of flow. These changes require need detection strategies risk assessments that are tailored not only between different but at distances paths as well. Being able understand how a event may in time space channel is utmost importance hazard management. While visual observations simple measuring devices past have shown...
ABSTRACT Here, all three components of the seismic signal are applied for use with amplitude source location (ASL) method to investigate if using yield more accurate results than just vertical component. Eight active events along a debris flow channel on Te Maari Volcano, New Zealand, used as known locations conduct test. Both coda-wave normalization (CWN) and horizontal-to-vertical (H/V) ratio methods calculate amplification factors station corrections. Average errors sources varied between...
Microplastic pollution is a growing concern worldwide, with rivers and their tributaries playing pivotal role in transporting distributing these particles throughout ecosystems. This study provides comprehensive analysis of microplastic Fishkill Creek, tributary the Hudson River, for two seasons (fall spring) valuable assistance K-12 students sample collection from three distinct sites, Sarah Taylor Park, Doug Phillips Hopewell Recreation Beach Fishkill, NY. The investigation encompassed...
<p>Here, we present data from lahars through the use of a 3-component broadband seismometer, accelerometer, and video camera installed 3 m Lumbre channel on Volcán de Colima, Mexico to understand rheology differences within multiple events, which occurred in late 2016. We used combination peak frequency content, directionality, analysis determine changes amongst events. Our findings show that different patterns each seismic component correspond differing rheologies...