A5062932445- Seismic Waves and Analysis
- Earthquake Detection and Analysis
- Seismology and Earthquake Studies
- Underwater Acoustics Research
- Geophysical Methods and Applications
- earthquake and tectonic studies
- Seismic Imaging and Inversion Techniques
- Radioactive contamination and transfer
- Ionosphere and magnetosphere dynamics
- Meteorological Phenomena and Simulations
- Geophysics and Sensor Technology
- Geophysics and Gravity Measurements
- Radioactivity and Radon Measurements
- Methane Hydrates and Related Phenomena
- Nuclear and radioactivity studies
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Hydraulic Fracturing and Reservoir Analysis
- Geomagnetism and Paleomagnetism Studies
- Atmospheric Ozone and Climate
- High-pressure geophysics and materials
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Ultrasonics and Acoustic Wave Propagation
- Planetary Science and Exploration
Federal Institute for Geosciences and Natural Resources
2015-2024
A.M. Obukhov Institute of Atmospheric Physics
2022
Hannover Re (Germany)
2008-2018
CEA DAM Île-de-France
2009
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2009
Centre National de la Recherche Scientifique
2009
Ruhr University Bochum
2008
The 15 January 2022 climactic eruption of Hunga volcano, Tonga, produced an explosion in the atmosphere a size that has not been documented modern geophysical record. event generated broad range atmospheric waves observed globally by various ground-based and spaceborne instrumentation networks. Most prominent was surface-guided Lamb wave (≲0.01 hertz), which we propagating for four (plus three antipodal) passages around Earth over 6 days. As measured amplitudes, comparable to 1883 Krakatau...
The 15 January 2022 Hunga, Tonga, volcano's explosive eruption produced the most powerful blast recorded in last century, with an estimated equivalent TNT yield of 100–200 megatons. energy was propagated through atmosphere as various wave types. prominent a long-period (>2000 s) surface-guided Lamb comparable to that 1883 Krakatoa wave; both were clearly observed by pressure sensors (barometers) worldwide. Internal gravity, acoustic-gravity, and infrasound waves captured great detail entire...
Abstract On 15 February 2013, a large Earth‐impacting fireball disintegrated over the Ural Mountains. This extraordinary event is, together with 1908 Tunguska fireball, among most energetic events ever instrumentally recorded. It generated infrasound returns, after circling globe, at distances up to ~85,000 km, and was detected 20 infrasonic stations of global International Monitoring System (IMS). For first time since establishment IMS network, multiple arrivals involving waves that...
Abstract High‐resolution, ground‐based and independent observations including co‐located wind radiometer, lidar stations, infrasound instruments are used to evaluate the accuracy of general circulation models data‐constrained assimilation systems in middle atmosphere at northern hemisphere midlatitudes. Systematic comparisons between observations, European Centre for Medium‐Range Weather Forecasts (ECMWF) operational analyses recent Integrated Forecast System cycles 38r1 38r2, NASA's...
To monitor compliance with the Comprehensive Nuclear‐Test ban Treaty (CTBT), a dedicated International Monitoring System (IMS) is being deployed. Recent global scale observations recorded by this network confirm that its detection capability highly variable in space and time. Previous studies estimated radiated source energy from remote using empirical yield‐scaling relations which account for along‐path stratospheric winds. Although wind correction reduces variance explosive versus pressure...
Abstract We report on a multi-technique analysis using publicly available data for investigating the huge, accidental explosion that struck city of Beirut, Lebanon, August 4, 2020. Its devastating shock wave led to thousands injured with more than two hundred fatalities and caused immense damage buildings infrastructure. Our combined seismological, hydroacoustic, infrasonic radar remote sensing allows us characterize source as well estimate explosive yield. The latter is determined within...
Large earthquakes that occurred in the Sumatra region 2004 and 2005 generated acoustic waves recorded by Diego Garcia infrasound array. The Progressive Multi‐Channel Correlation (PMCC) analysis is performed to detect seismic signals associated with these events. study completed an inverse location procedure permitted reconstruction of source infrasonic waves. results show ground motion near epicenter vibrations nearby land masses efficiently produced infrasound. also reveals unique evidence...
A global‐scale analysis of detections made at all 36 currently operating International Monitoring System (IMS) infrasound arrays confirms that the primary factor controlling signal detectability is seasonal variability stratospheric zonal wind. At most arrays, ∼80% in 0.2‐ to 2‐Hz bandpass are associated with propagation downwind dominant wind direction. Previous IMS network performance models neglect time‐ and site‐dependent effects both meteorological ambient noise models. In this study...
A large explosion occurred at the Buncefield Oil Depot, United Kingdom, on 2005 December 11, as result of a spillage 300 tonnes petrol. The generated amplitude infrasonic signals that were recorded ranges up to 1400 km. We present an analysis data from across Central Europe using seven infrasound arrays, four which total 20 arrivals, and 49 seismometers, 89 air-to-ground coupled arrivals. Exceptionally high stratospheric winds time explosion, propagating east-southeast with speeds 130 m s−1,...
Infrasound propagation paths through the atmosphere are controlled by temporally and spatially varying sound speed wind amplitudes. Because of complexity atmospheric acoustic it is often difficult to reconcile observed infrasonic arrivals with profiles predicted meteorological specifications. This paper provides analyses unexpected recorded in Europe north Africa from two series accidental munitions dump explosions, at ranges greater than 1000 km: explosions Gerdec, Albania, on 2008 March 15...
[1] The April–May 2010 summit eruption of Eyjafjallajökull, Iceland, was recorded by 14 atmospheric infrasound sensor arrays at ranges between 1,700 and 3,700 km, indicating that from modest-size eruptions can propagate for thousands kilometers in waveguides. Although variations both propagation conditions background noise levels the sensors generate fluctuations signal-to-noise ratios signal detectability, array processing techniques successfully discriminate volcanic ambient coherent...
Multiyear continuous infrasound monitoring with the global International Monitoring System (IMS) demonstrates that microbaroms, generated by nonlinear interaction of opposing oceanic surface waves, are globally observed at equatorial, middle, and high latitudes. Direction arrival microbarom signals systematically estimated all IMS stations. Using a cross‐bearing method, we perform monthly localization worldwide sources. At most stations, detections show clear seasonal trends, driven...
This paper reviews recent progress toward understanding the dynamics of middle atmosphere in framework Atmospheric Dynamics Research InfraStructure Europe (ARISE) initiative. The atmosphere, integrating stratosphere and mesosphere, is a crucial region which influences tropospheric weather climate. Enhancing requires improved measurement propagation breaking planetary gravity waves originating lowest levels atmosphere. Inter-comparison studies have shown large discrepancies between...
The ability of the International Monitoring System (IMS) infrasound network to detect atmospheric nuclear explosions and other signals interest is strongly dependent on station‐specific ambient noise. This noise includes both incoherent wind real coherent infrasonic waves. Previous models have not distinguished between components. We present a first attempt at statistically systematically characterizing recorded by IMS. perform broadband (0.01–5 Hz) array processing with IMS continuous...
The International Data Centre (IDC) in Vienna, Austria, is determining, as part of automatic processing, sensor noise levels for all seismic, hydroacoustic, and infrasound (SHI) stations the Monitoring System (IMS) operated by Provisional Technical Secretariat Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). Sensor being determined several times per day a power spectral density (PSD) using Welch overlapping method. Based on accumulated PSD statistics probability function (PDF)...
Abstract We experiment with a new method to search systematically through multiyear data from the International Monitoring System (IMS) infrasound network identify explosive volcanic eruption signals originating anywhere on Earth. Detecting, quantifying, and cataloging global occurrence of volcanism helps toward several goals in Earth sciences has direct applications hazard mitigation. combine signal association across multiple stations source location using brute‐force, grid‐search,...
Abstract The two major explosive phases of the 22–23 April 2015 eruption Calbuco volcano, Chile, produced powerful seismicity and infrasound. was recorded on seismo‐acoustic stations out to 1,540 km five (IS02, IS08, IS09, IS27, IS49) International Monitoring System (IMS) infrasound network at distances from 1,525 5,122 km. remote IMS provide an accurate explosion chronology consistent with regional local data previous studies lightning plume observations. We use detect locate signals using...
Research Article| July 13, 2016 Influence of Wind Turbines on Seismic Records the Gräfenberg Array Klaus Stammler; Stammler aFederal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655 Hannover, Germanyklaus.stammler@bgr.delars.ceranna@bgr.de Search other works by this author on: GSW Google Scholar Lars Ceranna Seismological Letters (2016) 87 (5): 1075–1081. https://doi.org/10.1785/0220160049 Article history first online: 14 Jul 2017 Cite View This Citation Add to...
Abstract The seismograms of earthquakes, which have closely spaced hypocenters, tend to be similar due the similarity Green’s functions characterizing source-receiver paths. Based on λ /4 criterion, it is frequently argued that earthquakes may represent repeated slip same patch a fault. Because phenomenological nature waveform similarity, such interpretations are strongly dependent seismic signal characteristics and way, defined. In this article, we use two-dimensional synthetic wave-field...
This paper demonstrates the usefulness of continuous infrasound monitoring on regional scales to advance development automated source location procedures, as well provide new insights into quantitative relationships between network detection capabilities and atmospheric specification. To achieve these goals, ground truth events in regions dense networks must be considered. The International Monitoring System (IMS) Comprehensive Nuclear‐Test Ban Treaty Organization (CTBTO), while currently...
Abstract. On 3 September 2017 official channels of the Democratic People's Republic Korea announced successful test a thermonuclear device. Only seconds to minutes after alleged nuclear explosion at Punggye-ri site in mountainous region country's northeast 03:30:02 (UTC), hundreds seismic stations distributed all around globe picked up strong and distinct signals associated with an explosion. Different seismological agencies reported body wave magnitudes well above 6.0, consequently...
Abstract The explosive fragmentation of the 2013 Chelyabinsk meteorite generated a large airburst with an equivalent yield 500 kT TNT. It is most energetic event recorded by infrasound component Comprehensive Nuclear‐Test‐Ban Treaty‐International Monitoring System (CTBT‐IMS), globally detected 20 out 42 operational stations. This study performs station‐by‐station estimation IMS detection capability to explain detections and nondetections from short long distances, using as global reference...