Searched for: subject%3A%22infrasound%22
(1 - 20 of 21)

Pages

document
den Ouden, O.F.C. (author)
doctoral thesis 2022
document
den Ouden, O.F.C. (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Evers, L.G. (author)
The ambient infrasonic noise field is complex due to the interference of spatially distributed infrasound sources. Microbaroms are one of the most dominant omnipresent infrasonic sources within this wavefield. These microbaroms are generated by nonlinear ocean surface wave interactions, and have a characteristic and continuous signature...
journal article 2022
document
Evers, L.G. (author), Smets, P.S.M. (author), Assink, J. D. (author), Shani-Kadmiel, Shahar (author), Kondo, K. (author), Sugiyama, S. (author)
A period of 18 years of infrasonic recordings was analyzed from a microbarometer array (I18DK) in northwestern Greenland, near Qaanaaq. A huge number of infrasonic detections, over 700,000, have been made in I18DKs soundscape during the Arctic summers. Simultaneously identified were both calving events from marine-terminating glaciers and...
journal article 2022
document
Shani-Kadmiel, Shahar (author), Averbuch, G. (author), Smets, P.S.M. (author), Assink, Jelle (author), Evers, L.G. (author)
In the days following the January 12, 2010 M<sub>w</sub> 7 Haiti earthquake the shaking intensity near the epicenter was overestimated and the spatial extent of the potentially damaging shaking was underestimated. This was due to the lack of seismometers in the near-source region at the time of the earthquake. Besides seismic waves,...
journal article 2021
document
Averbuch, G. (author)
The study of seismo-acoustic events is by no means new. Observations of earthquake-induced infrasound signals are dated back to the 1950s. However, the relative recent deployment of the International Monitoring System (IMS) by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) provided world coverage for such signals. The continuous...
doctoral thesis 2020
document
Averbuch, G. (author), Ben-Horin, Yochai (author), Smets, P.S.M. (author), Evers, L.G. (author)
Measurements of seismo-acoustic events by collocated seismic and infrasound arrays allow for studying the two wavefields that were produced by the same event. However, some of the scientific and technical constraints on the building of the two technologies are different and may be contradicting. For the case of a new station, an optimal design...
journal article 2019
document
Smink, M.M.E. (author), Assink, Jelle D. (author), Bosveld, Fred C. (author), Smets, P.S.M. (author), Evers, L.G. (author)
The Royal Netherlands Meteorological Institute (KNMI) operates a three-dimensional microbarometer array at the Cabauw Experimental Site for Atmospheric Research observatory. The array consists of five microbarometers on a meteorological tower up to an altitude of 200 m. Ten ground-based microbarometers surround the tower with an array aperture...
journal article 2019
document
Smets, P.S.M. (author)
Infrasound is low-frequency inaudible sound (&lt; 20Hz), used as a waveform verification technique for the Comprehensive Nuclear-Test-Ban Treaty (CTBT). In this thesis, it is shown that infrasound can provide useful additional upper atmospheric observations in a region where data coverage is sparse; beyond the middle stratosphere direct...
doctoral thesis 2018
document
Shani-Kadmiel, Shahar (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Evers, L.G. (author)
In this study we analyze infrasound signals from three earthquakes in central Italy. The M<sub>w</sub> 6.0 Amatrice, M<sub>w</sub> 5.9 Visso, and M<sub>w</sub> 6.5 Norcia earthquakes generated significant epicentral ground motions that couple to the atmosphere and produce infrasonic waves. Epicentral seismic and infrasonic signals are...
journal article 2018
document
Blanc, E (author), Ceranna, L. (author), Hauchecorne, A (author), Charlton-Perez, A (author), Marchetti, E. (author), Evers, L.G. (author), Kvaerna, T (author), Lastovicka, J. (author), Eliasson, L. (author), Crosby, N. B. (author), Blanc-Benon, P. (author), le Pichon, A (author), Brachet, N (author), Pilger, C (author), Keckhut, P (author), Assink, J. D. (author), Smets, P.S.M. (author), Lee, C. F. (author), Kero, J. (author), Sindelarova, T. (author), Kämpfer, N. (author), Rüfenacht, R. (author), Farges, T. (author), Millet, C. (author), Näsholm, S. P. (author), Gibbons, S. J. (author), Espy, P. J. (author), Hibbins, R. E. (author), Heinrich, P (author), Ripepe, M (author), Khaykin, S. (author), Mze, N. (author), Chum, J. (author)
This paper reviews recent progress toward understanding the dynamics of the middle atmosphere in the framework of the Atmospheric Dynamics Research InfraStructure in Europe (ARISE) initiative. The middle atmosphere, integrating the stratosphere and mesosphere, is a crucial region which influences tropospheric weather and climate. Enhancing...
journal article 2018
document
Selais, Y.A.Y. (author)
Atmospheric ambient noise (microbaroms) as well as crustal ambient noise (microseisms) both generated form non-linear interactions between ocean waves have been observed on co- located arrays to analyse the atmosphere and the source mechanism. Data has been provided by NORSAR for the month of January to make this analysis. Beamforming and Fisher...
master thesis 2016
document
Smets, P.S.M. (author), Assink, J. D. (author), Le Pichon, A. (author), Evers, L.G. (author)
Accurate prediction of Sudden Stratospheric Warming (SSW) events is important for the performance of numerical weather prediction due to significant stratosphere-Troposphere coupling. In this study, for the first time middle atmospheric numerical weather forecasts are evaluated using infrasound. A year of near-continuous infrasound from the...
journal article 2016
document
Assink, J. D. (author), Averbuch, G. (author), Smets, P.S.M. (author), Evers, L.G. (author)
The underground nuclear tests by the Democratic People's Republic of Korea (DPRK) generated atmospheric infrasound both in 2013 and 2016. Clear detections were made in the Russian Federation (I45RU) and Japan (I30JP) in 2013 at stations from the International Monitoring System. Both tropospheric and stratospheric refractions arrived at the...
journal article 2016
document
Smets, P.S.M. (author), Evers, L.G. (author)
A method is presented to study the life cycle of a SSW using infrasonic ambient noise observations. The potential of infrasound is shown to provide the missing observations required by numerical weather prediction to better resolve the upper atmosphere. The 2009 major SSW is reanalyzed using the Evers and Siegmund (2009) data set. Microbarom...
journal article 2014
document
Evers, L.G. (author), Brown, D. (author), Heaney, K.D. (author), Assink, J.D. (author), Smets, P.S.M. (author), Snellen, M. (author)
Atmospheric low-frequency sound, i.e., infrasound, from underwater events has not been considered thus far, due to the high impedance contrast of the water-air interface making it almost fully reflective. Here we report for the first time on atmospheric infrasound from a large underwater earthquake (Mw 8.1) near the Macquarie Ridge, which was...
journal article 2014
document
Assink, J.D. (author), Waxler, R. (author), Smets, P.S.M. (author), Evers, L.G. (author)
In January 2011, the state of the polar vortex in the midlatitudes changed significantly due to a minor sudden stratospheric warming event. As a result, a bidirectional duct for infrasound propagation developed in the middle atmosphere that persisted for 2 weeks. The ducts were due to two zonal wind jets, one between 30 and 50 km and the other...
journal article 2014
document
Garcia, R.F. (author), Bruinsma, S. (author), Lognonné, P. (author), Doornbos, E.N. (author), Cachoux, F. (author)
The first in situ sounding of a post-seismic infrasound wavefront is presented, using data from the GOCE mission. The atmospheric infrasounds following the great Tohoku earthquake (on 11 March 2011) induce variations of air density and vertical acceleration of the GOCE platform. These signals are detected at two positions along the GOCE orbit...
journal article 2013
document
Evers, L.G. (author), Van Geyt, A.R.J. (author), Smets, P. (author), Fricke, J.T. (author)
Long-range infrasound propagation strongly depends on the state of the stratosphere. Infrasound can be efficiently ducted between the Earth's surface and the stratopause under a favorable wind and temperature structure between 40 and 50 km altitude. Understanding infrasound propagation under variable stratospheric conditions is of importance for...
journal article 2012
document
Briels, S.A. (author)
By recording infrasound signals one is able to listen to the sound of highly energetic events such as volcanoes, meteorites and the supersonic flight of aircraft, even if these occur hundreds of kilometres away. Recordings of infrasound signals are made using infrasound arrays, which can determine the incoming direction of the signals. In this...
master thesis 2010
document
Evers, L.G. (author), Siegmund, P. (author)
The study of infrasound is experiencing a renaissance since it was chosen as a verification technique for the Comprehensive Nuclear-Test-Ban Treaty. The success of the verification technique strongly depends on knowledge of upper atmospheric processes. The ability of infrasound to probe the upper atmosphere starts to be exploited, taking the...
journal article 2009
Searched for: subject%3A%22infrasound%22
(1 - 20 of 21)

Pages