4 research outputs found
Magmatism on rift flanks: insights from Ambient-Noise Phase-velocity in Afar region
No full textDuring the breakup of continents in magmatic settings, the extension of the rift valley is commonly assumed to initially occur by border faulting and progressively migrate in space and time towards the spreading axis. Magmatic processes near the rift flanks are commonly ignored. We present phase-velocity maps of the crust and uppermost mantle of the conjugate margins of the southern Red Sea (Afar and Yemen) using ambient noise tomography to constrain crustal modification during breakup. Our images show that the low seismic velocities characterize not only the upper crust beneath the axial volcanic systems, but also both upper and lower crust beneath the rift flanks where ongoing volcanism and hydrothermal activity occur at the surface. Magmatic modification of the crust beneath rift flanks likely occurs for a protracted period of time during the breakup process, and may persist through to early seafloor spreading
Training, Validation and Test Sets for paper 'A Little Data goes a Long Way: Automating Seismic Phase Arrival Picking at Nabro Volcano with Transfer Learning'
No full textTraining, Validation and Test Data for model presented in paper 'A Little Data Goes A Long Way: Automating Seismic Phase Arrival Picking at Nabro Volcano with Transfer Learning', submitted to Journal of Geophysical Research: Solid Earth.
Files:
- train_events_2498.h5 = training set of seismic waveforms (events with P-/S-wave labelled arrivals only, i.e., no noise waveforms)
- train_events_2498.pkl = event training set metadata (UTC P-/S-wave phase arrival times)
- train_noise_2498.h5 = training set of seismic waveforms (noise sections only, i.e., no event waveforms)
- train_noise_2498.pkl = noise training set metadata (UTC time for training noise waveforms)
- val_events.h5 = validation set of seismic waveforms (events with P-/S-wave labelled arrivals only, i.e., no noise waveforms)
- val_events.pkl = event validation set metadata (UTC P-/S-wave phase arrival times)
- val_noise.h5 = validation set of seismic waveforms (noise sections only, i.e., no event waveforms)
- val_noise.pkl = noise validation set metadata (UTC time for validation noise waveforms)
- test.h5 = test set of seismic waveforms (events and noise)
- test_events.pkl = event test set metadata (UTC P-/S-wave phase arrival times for test event waveforms)
- test_noise.pkl = noise test set metadata (UTC time for test noise waveforms)
Further details and code for reading and using these files can be found at the GitHub repo for this paper: https://github.com/sachalapins/U-GPDAll original seismic data from the Nabro Urgency Array are available through IRIS Data Services (http://service.iris.edu/fdnws/dataselect/1/). See http://www.fdsn.org/networks/detail/4H_2011/ for further details on data access and availability. The data were collected with funding from the Natural Environment Research Council (NERC) project NE/J012297/1 ("Mechanisms and implications of the 2011 eruption of Nabro volcano, Eritrea"). The UK seismic instruments and data management facilities were provided under loan number 976 by SEIS-UK at the University of Leicester. The facilities of SEIS-UK are supported by NERC under Agreement R8/H10/64. Author SL was supported by a GW4+ Doctoral Training Partnership studentship from the Natural Environment Research Council (NERC) [NE/L002434/1]. Author BG was funded by the Engineering and Physical Sciences Research Council (EPSRC) and the School of Earth Sciences at the University of Bristol. Author MJW was funded by UKRI GCRF EP/P028233/1 ("PREPARE") and NERC NE/R017956/1 ("EQUIPT4RISK"). Author JMK was funded by NERC grant NE/R018006/1. Author KVC was supported by the AXA Research Fund. We gratefully acknowledge support from the sponsors of the Bristol University Microseismicity ProjectS (BUMPS) and the NERC Centre for the Observation and Modelling of Earthquakes, volcanoes and Tectonics (COMET). We also gratefully acknowledge the cooperation we received from the Eritrean government, Southern and Northern Red Sea Administrations, local sub-zones and village administrations. We thank the Department of Mines, Ministry of Energy and Mines for their continued support throughout the project. Special thanks go to Zerai Berhe, Mebrahtu Fisseha, Michael Eyob, Ahmed Mohammed, Kibrom Nerayo, Asresehey Ogbatsien, Andemichael Solomon and Isaac Tuum. We thank Alem Kibreab for his vital help in facilitating the fieldwork
An interactive quantitative temporal physiological model of glucose passage and absorption through the gastrointestinal tract and subsequent modulation of insulin and glucagon secretion in humans
No full textAlignment of the CMS silicon strip tracker during stand-alone commissioning
No full textThis is the Pre-print version of the Article. The official published version of the paper can be accessed from the link below - Copyright @ 2009 IOPThe results of the CMS tracker alignment analysis are presented using the data from cosmic tracks, optical survey information, and the laser alignment system at the Tracker Integration Facility at CERN. During several months of operation in the spring and summer of 2007, about five million cosmic track events were collected with a partially active CMS Tracker. This allowed us to perform first alignment of the active silicon modules with the cosmic tracks using three different statistical approaches; validate the survey and laser alignment system performance; and test the stability of Tracker structures under various stresses and temperatures ranging from +15C to -15C. Comparison with simulation shows that the achieved alignment precision in the barrel part of the tracker leads to residual distributions similar to those obtained with a random misalignment of 50 (80) microns in the outer (inner) part of the barrel.This work has been supported by: the Austrian Federal Ministry of Science and Research; the Belgium Fonds de la Recherche Scientifique and Fonds voor Wetenschappelijk Onderzoek; the Academy of Finland and
Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules / CNRS, France; the Bundesministerium für Bildung und Forschung, Germany; the Istituto Nazionale di Fisica Nucleare, Italy; the Swiss Funding Agencies; the Science and Technology Facilities Council, UK; the US Department of Energy, and National Science Foundation. Individuals
have received support from the Marie-Curie IEF program (European Union) and the A. P. Sloan Foundation
