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Topic: Seismic band

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Seismic band

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In the News (Tue 21 May 13)

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	Phase correcting seismic traces - Patent 4348749
		The output of the seismic data is then applied to the D filter which introduces the desired shot pulse to produce a signal which approximates the signal which would have been produced by a desired shot pulse interacting with the reflectivity of the earth in the absence of any distortion.
		In carrying out seismic prospecting, seismic traces or data are gathered in the field and thereafter processed to improve the quality of the data and to present the data in suitable form for use by geophysicists for determining the properties and structures of subterranean earth formations.
		In accordance with this invention a signal representing the minimum phase inverse of the signal pulse of the seismic energy applied to the earth in obtaining the seismic data is generated and is convolved with the signal pulse to obtain a signal representing a function g(t).
	www.freepatentsonline.com /4348749.html (4793 words)

	Attributes Revisited by M. Turhan Taner - Rock Solid Images
		Seismic Attributes are all the information obtained from seismic data, either by direct measurements or by logical or experience based reasoning.
		Since the seismic data does not contain any viable information at very low frequencies (due to band pass filtering in the field and during processing) these long wavelength trends cannot be utilized.
		The main hypothesis is ``Simple seismic wavelets are such that their amplitudes rise to a maximum at a rate proportional to their general spectral content and their phase increases continuously without any local reversal''.
	www.rocksolidimages.com /pdf/attrib_revisited.htm (12121 words)

	CVO Menu - Glossary of Earthquake and Related Terminology
		The amplitude of a seismic wave is the amount the ground moves as the wave passes by.
		Seismic waves are the vibrations from earthquakes that travel through the Earth; they are recorded on instruments called seismographs.
		tsunamis are seismic sea waves caused by earthquakes, submarine landslides, and, infrequently, by eruptions of island volcanoes.
	vulcan.wr.usgs.gov /Glossary/Seismicity/earthquake_terminology.html (2808 words)

	Merge Records
		J Mascis, Lou Barlow and Patrick "Murph" Murphy formed their now legendary band in 1984, in the sleepy college town of Amherst, MA, and went on to change the face of rock forever whether they actually ever intended to or not.
		laid the groundwork for a seismic shift in the underground rock scene.
		These first three albums, with their sonic wall of melodic bass, furious drums and stunning guitar wizardry, coupled with an almost laissez faire vocal delivery, became the sonic blueprint for what would become known as “alternative rock” over the next decade.
	www.mergerecords.com /band.php?band_id=103& (428 words)

	PERU - SOURCE MECHANISM OF THE EARTHQUAKE AND TSUNAMI OF OCTOBER 17, 1966 IN PERU - by Dr. George Pararas-Carayannis
		Lomnitz and Cabre' (1968), probably because of the sparcity of seismic data, were unable to determine a focal plane solution for this earthquake, and could not confirm this parallelism of the fault to the coast.
		The source mechanism of the tsunami generation associated with the earthquake of 17 October 1966 was indirectly inferred by studying the seismic and oceanic phenomena associated with this event.
		Seismic and water motion data indicated that the uplifted portion of the crustal block was on the continental side of the rift.
	www.drgeorgepc.com /Tsunami1966Peru.html (3476 words)

	MySpace.com - Seismic - Los Angeles, California - Rock / Funk / Jam Band - www.myspace.com/seismictheband
		But the seismicity of the band’s hometown is only the half of it.
		Seismic has also managed to turn the heads of some well-respected musicians who have joined the band onstage—Stanton Moore of Galactic, Jerry Joseph, Brian Jordan of Karl Denson's Tiny Universe, The Dirty Dozen Brass Band and Particle, to name a few.
		sad to hear you're dissolving the band, i really enjoyed the shows i was able to see, a couple in flagstaff, a few in tempe, and of course that trip to oak creek brewery from the verde hot springs one weekend when we caught the tail end of your set, all good memories.
	www.myspace.com /seismictheband (1021 words)

	SEISMIC STRATIGRAPHY
		Seismic Unit I (0-46.7 mbsf) is acoustically semitransparent with some low-amplitude reflectors toward the base of the unit that onlap the irregularities of acoustic basement (Fig.
		Seismic Unit I has a drape geometry, indicated by uniform thickness of the unit in the central part of the basin and a bottom morphology that follows the irregularities of acoustic basement (Fig.
		The overall onlapping fill character of the seismic units drilled in the Palmer Deep basins suggests that the style of sedimentation was dominated by hemipelagic drape and by infilling of the basins with sediment gravity flows, probably from a local source.
	www-odp.tamu.edu /publications/178_IR/chap_07/ch7_ht11.htm (1846 words)

	ORFEUS Newsletter - June 2001 - vol. 3 - no. 1 - page 3
		In Figure 2 a view of Organyà seismic station (CORG), in the Pyrenees, is shown with the seismometer vault, the instrumental house, the solar cells and the VSAT antenna.
		Seismic data are timed at each remote site using a temperature compensated crystal oscillator phase locked to a GPS time code receiver.
		Seismic data and triggers are automatically processed by a Data Analysis Computer, which performs the automatic event detection, and determinates the hypocenter and the magnitude of the earthquake.
	www.orfeus-eu.org /newsletter/vol3no1/catalonianet.html (2364 words)

	Physical Reservoir Models: From Pictures to Properties
		This is illustrated by projecting a wireline log (white), and half a cycle of a seismic wave (fl), on a sequence of sand and shale layers (Figure 1).
		Seismic models have to be constrained by other data to limit the number of physical realizations.
		By color coding seismic sections, proportional to the length of the "fluid" arrow shown in Figure 3, it is now possible to differentiate fluid fill, and lithology effects (Verm and Hilterman, 1995).
	www.mines.edu /~mpeeters/Resmod.html (4066 words)

	SEP-80 -- TABLE OF CONTENTS
		The method estimates a traveltime that is valid in the seismic frequency band, not the usual high frequency approximation.
		Using realistic seismic acquisition parameters, we are able to successfully detect and monitor dynamic gascap expansion in the reservoir during the fluid-flow simulation of the oil production process.
		With increasing radial distance from the injector, an annulus of hot water is likely to be seismically transparent due to a weak (5%) decrease in Vp, but a larger radial annulus of hot oil may be visible due to a predicted 10-15% decrease in Vp.
	sep.stanford.edu /public/docs/sep80/toc_html/index.html (5049 words)

	MTU Volcanoes Page - Merapi Volcano
		Their broad-band seismic instrument showed the associated disturbance beginning on 22 November at 1007 and 32 seconds (radial-component data shown on figure 2).
		In other words, the initial displacement at the beginning of the seismic record is thought to correspond to the arrival of signals from the inception of the collapse.
		Thus, on the seismic records, amplitudes ultimately grew to 600 times as large as the initial signals.
	www.geo.mtu.edu /volcanoes/merapi/gvn/merapi.v20n02.html (595 words)

	Surface wave tomography in Southern California using seismic ambient noise
		Seismic noise data from 148 broadband seismic stations in Southern California were used to extract the surface wave arrival-times between all station pairs in the network in the frequency band 0.05-0.4 Hz.
		In this frequency band, ambient noise (originating from ocean microseisms) propagating over long distances is typically dominated by surface waves.
		The seismic data were then used in a simple, but densely sampled tomographic procedure to estimate the surface wave velocity structure for a region in Southern California.
	www.agu.org /cgi-bin/SFgate/SFgate?language=English&verbose=0&listenv=table&application=sm05&convert=&converthl=&refinequery=&formintern=&formextern=&transquery=au%3dgerstoft&_lines=&multiple=0&descriptor=%2fdata%2fepubs%2fwais%2findexes%2fsm05%2fsm05%7c1000%7c3037%7cSurface%20wave%20tomography%20in%20Southern%20California%20using%20seismic%20ambient%20noise%7cHTML%7clocalhost:0%7c%2fdata%2fepubs%2fwais%2findexes%2fsm05%2fsm05%7c6747759%206750796%20%2fdata2%2fepubs%2fwais%2fdata%2fsm05%2fsm05.txt (280 words)

	Seismic Study
		Navcon engineers were contracted to conduct a seismic study at a Rock Crusher / Recycling Facility and to assess the ground vibration impact into an adjacent residential community.
		Narrowband and 1/3 octave band spectra were recorded at the industrial facility as well as in the community.
		The graphic shows a 1/3 octave band groundborne vibration spectrum (in units of RMS particle velocity) along with a limit spectrum as recommended by ANSI.
	www.navcon.com /SeismicTest.htm (164 words)

	A comparison of the noise levels of various GGP stations
		Moreover the integration over a frequency band leads to the estimate of the mean power within this band, and the PSD is always representative of a physical phenomenon, particularly if it is aperiodic or transient.
		It is called the Seismic Noise Magnitude (SNM), a quantity that is based on a narrow window in the normal mode band between 200s and 600s.
		A comparison of the noise levels in the subseismic band and in the tidal bands of GGP stations has to be carried out in the future, leading to a selection of the quietest stations for optimal stacking in the search for the Slichter mode (Slichter, 1961).
	www.astro.oma.be /ICET/bim/text/rosat.htm (2539 words)

	The Gap Band
		The band's first gold album; note that this is in fact their fifth LP - the pre-Mercury work isn't reflected in the title numbers.
		This record signalled a seismic change in the funk landscape: Parliament/Funkadelic, Ohio Players, Rufus and Tower Of Power had split up; War and even Earth, Wind and Fire were losing steam; Kool and The Gang had gone pop; James Brown and Sly Stone were approaching self-parody.
		The band finally settled into its style, with dense arrangements (verging on lush in the slower numbers) mostly built on synth timbres (aided by unofficial fourth member Oliver Scott, who added keyboards and trombone, and wrote the instrumental "Where Are We Going?").
	www.warr.org /gapband.html (2738 words)

	A wide depth distribution of seismic tremors along the northern Cascadia margin : Nature
		Many occurred within or close to the strong seismic reflectors above the plate interface where local earthquakes are absent, suggesting that the seismogenic process for tremors is fluid-related.
		The observed depth range implies that tremors could be associated with the variation of stress field induced by a transient slip along the deeper portion of the Cascadia interface or, alternatively, that episodic slip is more diffuse than originally suggested.
		Seismic reflection imaging of two megathrust shear zones in the northern Cascadia subduction zone
	www.nature.com /doifinder/10.1038/nature03903 (297 words)

	Crustal structure of the transpressional Variscan orogen of SW Iberia: SW Iberia deep seismic reflection profile ...
		The seismic profile samples three major tectonic terranes: the South Portuguese Zone, the Ossa-Morena Zone, and the Central Iberian Zone, which were accreted in Late Paleozoic times.
		Late strike-slip movements through crustal wedges are apparent in the seismic image and have strongly modified the geometry of sutures.
		The upper crust appears to be decoupled from the lower crust all along the seismic line, but some deformation has been accommodated at deeper levels.
	www.agu.org /pubs/crossref/2003.../2002TC001479.shtml (510 words)

	Unsigned Artists
		We are a band formed from the Fifth layer of the bowels of Hell.
		We survived from the slithering skulls of the skeletons of the underworld.
		The band was started 6months ago, through Eastliegh college and it all took off from there really.
	www.unsignedbandweb.com /artists.html (314 words)

	CWP Seminar
		Seismic interferometry is a powerful tool in extracting the response of ground motion.
		A method for simulation of 4D seismic response is presented and applied to data from the Ula Field.
		We are currently studying the application of seismic interferometry by deconvolution to learn what information we can extract from a single active shot, placed at the top of the well.
	www.cwp.mines.edu /~cwp/seminarFall05.html (2502 words)

	Seismic Network in Metropolitan Taipei (Site not responding. Last check: )
		The purpose of this project is o install downhole and surface seismic stations to observe seismic activity of the target area.
		During this project, several downhole seismic stations which are located inside the Taipei basin will be build to provide high quality data to determine earthquake locations near the Shanchiao Fault and to determine the seismic pattern and its other source parameters.
		The low frequency seismic tremor will be analyzed to determine the possible fluid migration and its origin based on its spectra variation with respect to time.
	www.earth.sinica.edu.tw /~smdmc/cgs_taipei/04cgs_eintro.htm (387 words)

	Earth - Facts, Information, and Encyclopedia Reference article
		Two large areas of polar climates separated by two rather narrow temperate zones from a wide equatorial band of tropical to subtropical climates.
		Precipitation patterns vary widely, ranging from several metres of water per year to less than a millimetre.
		[2] (pdf) - density, pressure, gravity, P-wave and S-wave seismic wave velocities, and Poisson's ratio as a function of depth
	www.startsurfing.com /encyclopedia/e/a/r/Earth.html (2391 words)

	Paper Articles - The Island (Site not responding. Last check: )
		It is a fact that the seismic monitoring station at Pallekele was the only station operational in the country during the recent calamity.
		The data from seismic station located on land should be combined with data from oceanic stations to accurately and effectively predict tsunamis.
		The seismic monitoring equipment available at the University of Peradeniya with peripherals at other national universities needs to be operationalized properly as a national network.
	www.gissl.lk /paper_articles_tsunami/article_3.htm (1219 words)

	Welcome to Department of Science and Technology, Govt. of India ::
		Seismicity programme is a research driven programme with a long prospective to provide a fillip to the science of seismology.
		The Seismicity Programme has been evolved with a view to understand the earthquake processes/mechanism related to the Indian Lithosphere, their recurrence interval and their manifestation on the surface towards developing knowledge and techniques for hazard mitigation.
		Seismic Microzonation is the process of estimating the likely seismic hazard on the surface of the earth due to a future scenario earthquake.
	dst.gov.in /scientific-programme/ser-seismicity.htm (2465 words)

	Erebus Volcano Seismic Tremor
		After twenty years of seismic observations on Mt. Erebus, tremor activity became conspicuous in the volcano on June 2000.
		Large numbers of tremor episodes with frequencies smaller than 0.5 Hz are likely related to the increment of broad band seismic stations operating since January 2003.
		The audio is a vertical seismogram, with a sampling rate of 40 samples per second, sped up 100 times to transpose the very slow seismic frequencies into the audible frequency band.
	www.ees.nmt.edu /Geop/mevo/seismic/tremor_obsolete.html (872 words)

	NETLANDER Scientific Payload
		It has "broad band" sensors and "short period" sensors as well as a few annex sensors (temperature, pressure, inclination).
		It should enable to determine the level and the distribution of Mars seismic activity and to supply information about its internal structure.
		Indeed, this experiment is based on the doppler measurements between the NetLander surface module and the relay satellite using the UHF telecomunication link and a pure carrier S band.
	smsc.cnes.fr /NETLANDER/GP_cu_scie.htm (776 words)

	Seismic Network Could Improve Disaster Response
		The IRIS GSN stations continuously record seismic data from very broad band seismometers at 20 samples per second, and to provide for high-frequency (40 sps) and strong-motion (1 and 100 sps) sensors where scientifically warranted.
		The quick response of the Global Seismographic Network to the 26 December 2004 Sumatra- Andaman earthquake offers clear opportunities to reduce the amount of time before an emergency response and assistance could be dispatched to a similarly afflicted area in the future.
		The researchers predict that because of its unparalleled detail, data from the Global Seismographic Network is expected to drive new scientific discoveries in the future, ranging from a better understanding of the preliminary conditions prior to a fault rupture, to honing tsunami and flood models.
	www.spacedaily.com /news/disaster-management-05k.html (681 words)

	Satellite Images for Oil Exploration and Production \| Satellite Imaging Corp
		Through geological and geophysical seismic interpretation and use of orthorectified satellite images, it provides insight on the selection of areas to plan 2D or 3D seismic surveys for an exploration drilling program as well as aiding in the process of environmental and operational safety hazards to minimize the HSE risks.
		By selecting good source offset locations, seismic data quality can improve and by selecting good access to seismic lines, environmental impact and safety risks are minimized.
		Using advanced satellite imaging sensors, color balancing techniques, and the correct band combinations, we produce specialized images per client requirements, optimized for the identification of specified terrain and geological features.
	www.satimagingcorp.com /svc/exploration.html (1079 words)

	The Southern Ontario Seismic Network
		The Southern Ontario Seismic Network (SOSN) is part of the Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity (POLARIS) Consortium.
		It has been in operation since 1991 with the purpose of obtaining information on the seismicity and seismic hazards of a region of Southern Ontario in which a number of nuclear power stations located.
		Although this region is not as seismically active as other areas of Eastern Canada such as the St. Lawrence Valley, it still has experienced numerous small earthquakes in the past.
	www.gp.uwo.ca (500 words)

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