Loading Events

Past Events

Events Search and Views Navigation

Event Views Navigation

Past Events

December 2019

Underground Experiments and Picoseismicity: Understanding Rock Response by Studying Tiny Seismic Events

December 18, 2019 @ 11:00 am - 12:00 pm
Katrin Plekers

Dr. Katrin Plenkers What to Expect Picoseismicity allows to study the rock response in great detail, which is of importance in may large-scale experiments in underground laboratories addressing questions like earthquake nucleation, hydro-fracturing or nuclear waste disposal. Furthermore, picoseismi monitoring is used for structural health monitoring e.g. in mines. Picoseismicity corresponds to seismic events representing fractures on mm-, cm or dm scale (Magnitudes approx. -6 < M < 0). Seismic signals with frequencies from ~ 1000 Hz to ~150.000 Hz are…

Find out more »

Distributed Acoustic Sensing for Seismic Imaging and Reservoir Monitoring Applied to Carbon Capture and Storage Projects

December 19, 2019 @ 10:00 am - 11:00 pm

Julia Correa What to Expect In carbon geosequestration projects, there is an essential need for effective monitoring of the carbon dioxide storage over decades to ensure safe containment of the CO2 plume in the reservoir. However, current seismic monitoring techniques usually involve a combination of various seismic surveys acquired using a large array of seismic receivers and moveable sources to image the emplaced gas plume. The complexity of such surveys results in expensive operations that are, at times, unviable for carbon…

Find out more »

January 2020

Climate Brown Bag: Scaling Plant Physiology from the Leaf to Space

January 13 @ 12:00 pm - 1:00 pm

Troy Sehlin Magney What to Expect To characterize CO2 uptake by the terrestrial biosphere, an understanding of the spatial and temporal dynamics of photosynthesis is necessary. From remote sensing platforms, we have traditionally only been able to estimate plant photosynthesis based on canopy ‘greenness.’ Unfortunately, canopy ‘greenness’ doesn’t tell us about the fate of absorbed photons, i.e. just because a plant is green does not mean it is doing photosynthesis. Absorbed light by green plants generally has three fates: 1)…

Find out more »

Data Challenges in Analyzing Fault Slip Rates, Determining Drilling Targets for Gold Exploration and Understanding Lithospheric Subsidence in Antarctica

January 17 @ 9:00 am - 10:00 pm

Dr. Sumant Jha What to Expect Data is the backbone of any analysis. From using NASA’s space radar topographic mission data for analyzing landslide hazards to using data collected from scientific ships around Antarctica to determine the shape of the seafloor over the past 5 million years, I have used data in different formats to address different scientific questions. Geoscientific analysis invariably involves reading a given set of geologic/geophysical data to devise solutions for a particular problem. These data consist…

Find out more »

Geophysics and the Shale Revolution: The Anisotropy Connection

January 17 @ 10:30 am - 12:00 pm

Leon Thomsen University of Houston Delta Geophysics What to Expect This is a critical time in the history of the profession of exploration geophysics. Today the world is awash with copious supplies of oil, and so the price of oil is low, and hence many geophysical jobs have disappeared. For most of the past 40 years, the world feared the imminent exhaustion of its endowment of oil, but, in the last decade vast new deposits of oil have indeed been…

Find out more »

Environmental Monitoring and Modeling after the Fukushima NPP Accident: the Role of Catchment Science

January 22 @ 1:00 pm - 2:00 pm

Yuuichi Onda What to Expect Immediately after the fallout of Radiocesium by Fukushima Daiichi Nuclear Powerplant Accident, comprehensive environmental monitoring has been carried out in terrestrial areas. The methods and protocols were based on the studies carried out by catchment sciences, and numerous data are available on the runoff, sediment yield in 80-km radius from the FDNPP for now. We have installed 7 plot scale monitoring sites, paddy runoff sites, 4 headwater catchment sites including both surface and groundwater, and…

Find out more »

Get to Know Your PostDocs Seminar

January 23 @ 1:00 pm - 2:00 pm

Harrison Lisabeth Lab-scale seismology: insights into the pressure dependence of wave propagation in fractured rocks Patrick Sorensen Winter is coming: Snowmelt microbial ecology at high chemical and molecular resolution

Find out more »

Climate Brown Bag: Flexible Modeling of Spatial Extremes on Datasets with Many Locations

January 27 @ 11:00 am - 12:00 pm

Likun Zhang What to Expect Flexible spatial models that allow transitions between tail dependence classes have recently appeared in the literature. However, inference for these models is computationally prohibitive, even in moderate dimensions, due to the necessity of repeatedly evaluating the multivariate Gaussian distribution function. In this talk, we present a model that achieves truly high-dimensional inference for extremes of spatial processes, while retaining the desirable flexibility in the tail dependence structure, by modifying an established class of models based…

Find out more »

Climate Brown Bag: Machineries of Doubt – Climate, Cigarettes, Confusionnfusion

January 27 @ 12:00 pm - 1:00 pm

Dr. John Mashey What to Expect Climate science has generated clear results on humans: climate change, as clear as those by medical research on smoking: disease, but in both cases, progress has been impeded by well-organized doubt creation, often done by the same organizations or even same people. This talk examines the mechanisms, tactics, funding flows, people and organizations who do this, as well as signs of progress, such as the formation of the Climate Science Legal Defense Fund, books…

Find out more »

Groundwater Flow and Heat/Solute Transport in Multilayered Fractured Reservoirs

January 28 @ 3:00 pm - 4:30 pm

Quanlin Zhou What to Expect Simplified dual-continuum (e.g., dual-porosity, dual-permeability, and multiple interacting continua [MINC]) models have been extensively employed in numerical modeling of groundwater flow and heat/solute transport in fractured reservoirs that may or may not be bounded by aquitards. However, these models, with conceptual nature of dealing with fracture-matrix exchanges, have never been verified by exact solutions, and their uses often lead to incorrect results and misleading conclusions. In this talk, I will first present the unified-form equation…

Find out more »
+ Export Events