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Journal Article

Short‐Range Recordings of Shallow Underwater Explosions with Short‐Period and Broadband Seismometers in the Bay of Hyères, France Available to Purchase

Mickaël Bonnin, E. Diego Mercerat, Éric Beucler, Nathalie Favretto‐Cristini, Anne Deschamps, David Ambrois, Thierry Garlan
Published: 22 November 2022
Bulletin of the Seismological Society of America (2023) 113 (4): 1542–1560.
DOI: https://doi.org/10.1785/0120220141
...Mickaël Bonnin; E. Diego Mercerat; Éric Beucler; Nathalie Favretto‐Cristini; Anne Deschamps; David Ambrois; Thierry Garlan ABSTRACT This study presents the analysis of the seismic records of eight underwater explosions triggered by the French Navy Mine Warfare Office in December 2018 in the Bay...
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View PDF for article title, Short‐Range Recordings of Shallow <span class="search-highlight">Underwater</span> <span class="search-highlight">Explosions</span> with Short‐Period and Broadband Seismometers in the Bay of Hyères, France
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Journal Article

Seismic and Hydroacoustic Observations from Underwater Explosions off the East Coast of Florida Available to Purchase

Ross Heyburn, Stuart E. J. Nippress, David Bowers
Published: 16 October 2018
Bulletin of the Seismological Society of America (2018) 108 (6): 3612–3624.
DOI: https://doi.org/10.1785/0120180105
...Ross Heyburn; Stuart E. J. Nippress; David Bowers Abstract In this study, seismic and hydroacoustic signals from underwater explosions in 2001, 2008, and 2016 near Florida are analyzed. These 10,000 lb chemical explosions were detonated by the United States Navy to validate the ability of new...
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View PDF for article title, Seismic and Hydroacoustic Observations from <span class="search-highlight">Underwater</span> <span class="search-highlight">Explosions</span> off the East Coast of Florida
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Journal Article

T -Wave Detection of Two Underwater Explosions off Hawaii on 13 April 2000 Available to Purchase

Dominique Reymond, Olivier Hyvernaud, Jacques Talandier, Emile A. Okal
Published: 01 April 2003
Bulletin of the Seismological Society of America (2003) 93 (2): 804–816.
DOI: https://doi.org/10.1785/0120010296
...Dominique Reymond; Olivier Hyvernaud; Jacques Talandier; Emile A. Okal Abstract We studied two presumed underwater explosions, detonated on 13 April 2000 (approximate times 00:19 and 23:29 coordinated universal time), at a site located approximately 215 km southwest of Oahu, Hawaii, and detected...
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Journal Article

Discrimination of Earthquakes and Underwater Explosions Using Neural Networks Available to Purchase

Edoardo Del Pezzo, Anna Esposito, Flora Giudicepietro, Maria Marinaro, Marcello Martini, Silvia Scarpetta
Published: 01 February 2003
Bulletin of the Seismological Society of America (2003) 93 (1): 215–223.
DOI: https://doi.org/10.1785/0120020005
...Edoardo Del Pezzo; Anna Esposito; Flora Giudicepietro; Maria Marinaro; Marcello Martini; Silvia Scarpetta Abstract We report on the implementation of an automatic system able to discriminate between explosion-generated artificial seismic events and local earthquakes in the Phlegraean Fields (Italy...
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Journal Article

T phases from underwater explosions off the coast of Israel Available to Purchase

Avi Shapira
Published: 01 August 1981
Bulletin of the Seismological Society of America (1981) 71 (4): 1049–1059.
DOI: https://doi.org/10.1785/BSSA0710041049
...Avi Shapira abstract T phases from underwater explosions off the coast of Israel were recorded at three temporarily installed seismograph stations. The T waves propagated as sound waves through the water with a velocity of about 1.53 km/sec, possibly in the so-called SOFAR channel. Three phases...
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Journal Article

A study of compressional waves from shallow underwater explosions recorded on land Available to Purchase

Klaus Meyer
Published: 01 June 1976
Bulletin of the Seismological Society of America (1976) 66 (3): 1009–1011.
DOI: https://doi.org/10.1785/BSSA0660031009
... by underwater explosions , Seism. Inst., Uppsala, Report No. 2-75 , 21 pp. Meyer K. (1975) . Secondary pressure pulses from underwater explosions , Seism. Inst. Uppsala, Report No. 9-75 , 24 pp. LETTERS TO THE EDITOR 1009 A STUDY...
View PDF for article title, A study of compressional waves from shallow <span class="search-highlight">underwater</span> <span class="search-highlight">explosions</span> recorded on land
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Journal Article

Deconvolution of refraction seismograms from large underwater explosions Available to Purchase

R. E. White, R. F. Mereu
Journal: Geophysics
Published: 01 June 1972
Geophysics (1972) 37 (3): 431–444.
DOI: https://doi.org/10.1190/1.1440269
...R. E. White; R. F. Mereu Abstract The P-wave spectra of seismograms from large underwater explosions are frequently dominated by reverberations. When this is so, a simple reverberation model similar to that of Backus (1959) gives a good approximation to the source spectrum. The basic wavelet...
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Journal Article

Emission by underwater explosions Available to Purchase

M. Lavergne
Journal: Geophysics
Published: 01 June 1970
Geophysics (1970) 35 (3): 419–435.
DOI: https://doi.org/10.1190/1.1440104
...M. Lavergne Abstract Theoretical and experimental investigations of the seismic effects of underwater explosions of dynamite charges are described. We investigate the acoustic efficiency in a broad frequency band and in the seismic frequency band, the partition of energy between the shock wave...
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Journal Article

Modeling of seismic signals from large underwater explosions to predict the spectra and covariance functions Available to Purchase

R. Plutchok, P. Broome
Published: 01 June 1969
Bulletin of the Seismological Society of America (1969) 59 (3): 1137–1147.
DOI: https://doi.org/10.1785/BSSA0590031137
...R. Plutchok; P. Broome abstract A model is presented which makes it possible to accurately predict the power spectrum and the covariance function of seismic signals generated by large under-water shots. It is shown by comparison of predicted and measured data for several large underwater explosions...
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Journal Article

Teleseismic signals calculated for underground, underwater, and atmospheric explosions Available to Purchase

E. W. Carpenter
Journal: Geophysics
Published: 01 February 1967
Geophysics (1967) 32 (1): 17–32.
DOI: https://doi.org/10.1190/1.1439854
... spreading), nonelastic effects, and the influence of the recording system. Source functions appropriate to atmospheric explosions, underwater explosions, and underground explosions in a variety of rock types are derived. The effects of elastic and nonelastic behavior are combined to define a standard...
View PDF for article title, Teleseismic signals calculated for underground, <span class="search-highlight">underwater</span>, and atmospheric <span class="search-highlight">explosions</span>
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Journal Article

Identification of presumed shallow underwater chemical explosions using land-based regional arrays Available to Purchase

Douglas R. Baumgardt, Zoltan Der
Published: 01 April 1998
Bulletin of the Seismological Society of America (1998) 88 (2): 581–595.
DOI: https://doi.org/10.1785/BSSA0880020581
...-2211, 29 August 1991 , ENSCO, Inc. , Springfield, Virginia . Cole R. H. (1948) . Underwater Explosions , Princeton U Press , Princeton, New Jersey . Der Z...
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Journal Article

TRANSPACIFIC DETECTION OF MYOJIN VOLCANIC EXPLOSIONS BY UNDERWATER SOUND Available to Purchase

R. S DIETZ, M. J SHEEHY
Journal: GSA Bulletin
Published: 01 October 1954
GSA Bulletin (1954) 65 (10): 941–956.
DOI: https://doi.org/10.1130/0016-7606(1954)65[941:TDOMVE]2.0.CO;2
... the highest, and the only subaerially exposed, portion of the caldera rim. A series of great explosions accompanied the extrusion of augite-hypersthene dacite. Since 26 September, when the main series of explosions ended, there has been only sporadic activity. Because of its remoteness, only a few visual...
View PDF for article title, TRANSPACIFIC DETECTION OF MYOJIN VOLCANIC <span class="search-highlight">EXPLOSIONS</span> BY <span class="search-highlight">UNDERWATER</span> SOUND
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Peak water pressure versus distance for underwater explosions of TNT in ocean waters and measurements of the Dead Sea shots.

Peak water pressure versus distance for underwater explosions of TNT in oce... Available to Purchase

Published: 01 March 2001
Figure 7. Peak water pressure versus distance for underwater explosions of TNT in ocean waters and measurements of the Dead Sea shots.
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Location map of the underwater explosion estimated by (a) a stack of just the hydroacoustic arrival and (b) a combined P, S, and hydroacoustic stack. Brighter colors indicate regions with higher stacking power, with maximum marked by a green point with the yellow point marking the catalog location estimated by the Royal Observatory of Belgium using surface seismic stations. (c) A time snapshot of the grid of stacked traces at 1 min after the estimated explosion. The green point is the inverted source location from panel (b). (d) Modeled travel times of the P, S, and hydroacoustic arrivals using the catalog location (dashed lines) and our new estimate (solid line). The color version of this figure is available only in the electronic edition.

Location map of the underwater explosion estimated by (a) a stack of just t... Available to Purchase

Published: 15 January 2025
Figure 9. Location map of the underwater explosion estimated by (a) a stack of just the hydroacoustic arrival and (b) a combined P , S , and hydroacoustic stack. Brighter colors indicate regions with higher stacking power, with maximum marked by a green point with the yellow point marking
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An Mw 1.1 event generated by a commercial underwater explosion (1375 kg) was registered on the Vancouver (British Columbia, Canada) urban network (triangles) on 23 February 2006. Voronoi polygon intersections up to order 4 are shown for the first four stations (circles), which detected the event in the order indicated. The hatched area is the ordered, fourth order Voronoi polygon associated with the arrival order. The actual blast site is shown with a star and is located close to the southern most vertex of the final (hatched) polygon.

An M w  1.1 event generated by a commercial underwater explosion (1375 kg... Available to Purchase

Published: 01 June 2009
Figure 3. An M w  1.1 event generated by a commercial underwater explosion (1375 kg) was registered on the Vancouver (British Columbia, Canada) urban network (triangles) on 23 February 2006. Voronoi polygon intersections up to order 4 are shown for the first four stations (circles), which
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▴ Recordings of an underwater explosion set off by a fisherman that occurred on 7 May 2008 in Pozzuoli Bay and was recorded by CUMAS (station code CFSB) from the hydrophone (top) and by the three-component seismometer.

▴ Recordings of an underwater explosion set off by a fisherman that occurre... Available to Purchase

Published: 01 March 2009
Figure 8. ▴ Recordings of an underwater explosion set off by a fisherman that occurred on 7 May 2008 in Pozzuoli Bay and was recorded by CUMAS (station code CFSB) from the hydrophone (top) and by the three-component seismometer.
Journal Article

Ocean Space Surveillance and Real‐Time Event Characterization Using Distributed Acoustic Sensing on Submarine Networks Available to Purchase

Alan F. Baird, Jan Petter Morten, Volker Oye, Steinar Bjørnstad
Published: 15 January 2025
Seismological Research Letters (2025) 96 (2A): 691–705.
DOI: https://doi.org/10.1785/0220240360
...Figure 9. Location map of the underwater explosion estimated by (a) a stack of just the hydroacoustic arrival and (b) a combined P , S , and hydroacoustic stack. Brighter colors indicate regions with higher stacking power, with maximum marked by a green point with the yellow point marking...
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(a) Strain recording of an underwater controlled explosion. (b) Spectrogram for observed underwater explosion records at position 24.5 km. The waveform at the arrival of the hydroacoustic wave, in the time interval 12:45:50–12:46:00 in the plot, has a leading low‐frequency component (below 20 Hz) before the arrival of the main energy at a higher frequency. (c) Frequency–wavenumber power spectrum of the seaward propagating energy for the white color cable segment in Figure 1a for the underwater explosion. The yellow dashed lines are plotted along contours of constant apparent velocity. The color version of this figure is available only in the electronic edition.

(a) Strain recording of an underwater controlled explosion. (b) Spectrogram... Available to Purchase

Published: 15 January 2025
Figure 3. (a) Strain recording of an underwater controlled explosion. (b) Spectrogram for observed underwater explosion records at position 24.5 km. The waveform at the arrival of the hydroacoustic wave, in the time interval 12:45:50–12:46:00 in the plot, has a leading low‐frequency component
Journal Article

The 26 September 2022 Nord Stream Events: Insights from Nearby Seismic Events Open Access

Ross Heyburn, David N. Green, Alexandra Nippress, Neil D. Selby
Published: 03 January 2024
The Seismic Record (2024) 4 (1): 1–10.
DOI: https://doi.org/10.1785/0320230047
... and infrasound signals from these two events and compare the seismic signals with those from other nearby seismic events such as underwater explosions and presumed earthquakes. Arrival times of seismic signals from the events on 26 September 2022 are used to show that the epicenters for both the events...
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Regional seismic waveform discriminants and case-based event identification using regional arrays Available to Purchase

Douglas R. Baumgardt, Gregory B. Young
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6B): 1874–1892.
DOI: https://doi.org/10.1785/BSSA08006B1874
... modulations indicative of ripple-firing. These include a number of offshore events, which appear to be underwater explosions. The modulations for the offshore events may have been caused by bubble pulse interference effects and/or underwater reverberations. Amplitude ratios of Pn/Sn and Pn/Lg , measured off...
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