Earthquakes Seismology IPA en sa z m l d i is the scientific study of earthquake s and the propagation of Linear elasticity Elastic wave elastic wave s through the Earth or through other planet like bodies. The field also includes studies of earthquake effects, such as tsunamis as well as diverse seismic source s such as volcanic, tectonic, oceanic, atmospheric, and artificial processes such as explosions ... major developments in the science of seismology include the 1857 Basilicata earthquake , 1906 San ... sources See also Reflection seismology Seismic waves produced by explosion s or vibrating controlled ... polarization and magnetotellurics . Controlled source seismology has been used to map salt dome s, faults ... to as forensic seismology . A major long term motivation for the global seismographic monitoring has ... ref Seismology and society Earthquake prediction main Earthquake prediction Forecasting a probable ... Observatory seismology an anniversary symposium on the occasion of the centennial of the University ... last van Eck editor3 first Torild title Earthquake Data in Engineering Seismology Predictive Models ... geology Forensic seismology Geophysical migration Helioseismology Incorporated Research Institutions for Seismology The IRIS Consortium Isoseismal map Seismic loading Seismic performance analysis ... ref harv cite book title Seismology and Plate Tectonics last1 Gubbins first1 David publisher Cambridge ... An overview volume 81B series International Handbook of Earthquake and Engineering Seismology year 2003 publisher International Association of Seismology & Physics of the Earth s Interior pages 1205 ......327.1214S ref harvid Schulte et al. 2010 cite book title Introduction to Seismology last1 Shearer ... ref harv cite book title An Introduction to Seismology, Earthquakes and Earth Structure last1 Stein .... Geophysics navbox Category Seismology Category Earthquake engineering ar be ... pl Sejsmologia pt Sismologia ro Seismologie ru simple Seismology sk Seizmol gia sl Seizmologija ... more details
Forensic seismology is the forensic use of the techniques of seismology to detect and study distant phenomena, particularly explosion s, including those of nuclear weapons . ref name RogersKoper cite web url http web.mst.edu rogersda umrcourses ge342 Forensic 20Seismology revised.pdf title Some Practical Applications of Forensic Seismology author J. David Rogers and Keith D. Koper accessdate 2011 09 09 ref Because of the efficiency with which seismic waves propagate through the Earth and the technical difficulties of decoupling explosions to diminish their seismic radiation, forensic seismology is a critical technique in the enforcement of bans on underground nuclear testing . ref cite web url https www.llnl.gov str Zucca.html title Forensic Seismology Supports CTBT author John J. Zucca publisher Lawrence Livermore National Laboratory date September 1998 accessdate 2011 09 09 ref In addition to nuclear explosions, the signatures of many other kinds of explosions can also be detected and analyzed by forensic seismology, ref name RogersKoper and even other phenomena such as ocean waves the global microseism , the movement of icebergs across the sea floor or in collision with other icebergs, or explosions within submarines. ref cite web url http www.cosmosmagazine.com features online 2604 forensic seismology title Forensic seismology date 5 March 2009 author Richard A. Lovett publisher COSMOS magazine ref ref cite web url http www.agiweb.org geotimes feb01 kursk.html title Sinking the Kursk publisher GeoTimes author Christina Reed date February 2001 accessdate 2011 09 09 ref Organizations with expertise in forensic seismology include AWE Blacknest , Los Alamos National Laboratory , Sandia National Laboratory , and Lawrence Livermore National Laboratory . References reflist See also Comprehensive Nuclear Test Ban Treaty Forensics stub Category Forensics Category Seismology Category Underground nuclear explosive tests Category Arms control ... more details
Slowness s is a quantity introduced in Seismology which is the Multiplicative inverse reciprocal of velocity . Thus travel time of a wave is nothing but the distance that the wave travels times the slowness of the medium in seismology, it refers to different layers of Earth exhibiting different Density densities Thus, Slowness 1 Velocity If we divide the path followed by the ray into N segments numbered i 1, 2 .. N the total travel time of the wave is si xi Therefore, the residual travel time is due to departures in slowness experienced by the wave along the raypath. References Reflist External links http bssa.geoscienceworld.org cgi content abstract 74 1 97 http books.google.co.uk books?id Kf8fyvRd280C&pg PA137&lpg PA137&dq slowness seismology&source bl&ots orBwDYU2YU&sig NNs9E1jza05awOlqOGyKwp52GDA&hl en&ei 4uJ8S6 hGoX20gT8uaTLBQ&sa X&oi book result&ct result&resnum 5&ved 0CBYQ6AEwBA v onepage&q slowness 20seismology&f false DEFAULTSORT Slowness Seismology Category Seismology ... more details
Studies of lunar seismology have been and is planned to be used by scientists, engineers and artists for a number of purposes including Learning about the moon s and Earth s evolution Understanding Earth s seismology with comparative studies Gaining knowledge about tidal moonquakes or other origins of these forces since the moon is thought to have no tectonic plates Advancing the field of selenography the geography of the moon History Several seismograph seismographic measuring system s have already been installed on the moon and their data made available to scientists such as the those from the Apollo Lunar Surface Experiments Package . The existence of moonquakes was an unexpected discovery from seismometer s placed on the Moon by Apollo astronauts from 1969 through 1972. The instruments placed by the Apollo 12 , Apollo 14 14 , Apollo 15 15 and Apollo 16 16 missions were functional until they were switched off in 1977. ref http adsabs.harvard.edu abs 1981JGR....86.5061G Goins, N. R. et al, Lunar seismology The internal structure of the moon . Journal of Geophysical Research vol. 86 june 10, 1981 , pp. 5061 5074 abstract . doi 10.1029 JB086iB06p05061 Retrieved 2012 02 12. ref Moonquakes are not believed to be caused by tectonic plate movement as earthquakes are , but by tidal force s between Earth and the moon. ref http www.lpi.usra.edu lunar missions apollo apollo 15 experiments ps Apollo 15 Mission. Lunar and Planetary Institute Retrieved 2012 02 12. ref Further data hopes to clarify the origins and effects of the forces causing moonquakes. anchor Plans External links Future plans Scientists worldwide including researchers at Arizona State University , an institution responsible for aspects of several earth orbit and extraplanetary exploratory missions are proposing new seismographic experiments to be conducted on the moon. Scientists and engineers are working to design ... of the universe. References Reflist Category Lunar science Category Seismology ... more details
Coronal seismology is a technique of studying the plasma physics plasma of the Sun s corona with the use of magnetohydrodynamics magnetohydrodynamic MHD wave s and oscillation s. Magnetohydrodynamics studies the dynamics mechanics dynamics of electrical conduction electrically conducting fluid s in this case the fluid is the coronal plasma. Observed properties of the waves e.g. frequency period , wavelength , amplitude , temporal and spatial signatures Clarify date November 2009 , characteristic scenarios of the wave evolution Clarify date November 2009 , combined with a theoretical modelling of the wave phenomena dispersion relation s, evolutionary equations, etc. , reveal physical parameters of the corona which are not open to direct observations, such as the coronal magnetic field strength and Alfv n wave Alfv n velocity Alfv n velocity ref name Nakariakov2001 cite journal author Nakariakov ... issue 5429 ref Originally, the method of MHD coronal seismology was suggested by Y. Uchida in 1970 ref ... ref for global seismology standing waves and B. Roberts et al. in 1984 ref cite journal author ... 865 year 1984 doi 10.1086 161956 bibcode 1984ApJ...279..857R ref for local seismology propagating waves .... Philosophically, coronal seismology is similar to the Earth s seismology , helioseismology ... are used to probe a medium. Image Coronal seismology simple.png thumb A scheme of the method of MHD coronal seismology. The theoretical foundation of coronal seismology is the dispersion relation of MHD ... see solar prominence , and this list is continuously updated. Coronal seismology is one of the aims ... and plasma wave sensor, allowing unprecedented observations for coronal seismology. Conclusions The potential of coronal seismology in the estimation of the coronal magnetic field , density scale ... feature.asp?id 15F1&style feature Roberts, B., Nakariakov, V.M., Coronal seismology a new science ... research seismology Plasma diagnostics using MHD waves Category Sun Category Solar phenomena Category ... more details
Image Seg y picture.gif thumb right 300px Seismic reflection data Reflection seismology or seismic reflection is a method of exploration geophysics that uses the principles of seismology to estimate the properties ... vibrator, commonly known by the trademark name Vibroseis. Reflection seismology is similar to sonar ... name SheriffGeldart Sheriff, R. E., Geldart, L. P., 1995 , 2nd Edition. Exploration Seismology. Cambridge ... seismology may be seen as a type of inverse problem . That is, given a set of data collected by experiment ... seismology, the experimental data are recorded seismograms, and the desired result is a model of the structure ..., the results obtained from reflection seismology are usually not unique more than one model adequately ... section date December 2010 Reflection seismology is used extensively in a number of fields and its .... 3D Seismic Imaging for Mineral Exploration. Commission on Controlled Source Seismology Deep Seismic ..., at depths of up to 100km. A method similar to reflection seismology which uses electromagnetic ... as Ground penetrating radar or GPR. Hydrocarbon exploration Reflection seismology, more commonly referred ... Exploration Seismology edition 2nd publisher Cambridge University Press isbn 0 521 46826 4 page 260 ... processes in seismic data processing Deconvolution Seismology deconvolution , common midpoint CMP stacking ... Cite book author Sheriff, R. E., Geldart, L. P. year 1995 title Exploration Seismology edition 2nd ... hydrocarbon indicator direct hydrocarbon indicators . Crustal studies The use of reflection seismology ... method in 1924. ref Sheriff, R. E., and Geldart, L. P., 1995, Exploration Seismology, Second Edition ... companies using reflection seismology in hydrocarbon exploration, hydrology , engineering studies ... seismic data using their own personnel and technology. Reflection seismology has also found applications ... important topics in reflection seismology. Most require some knowledge of mathematics, geology, and or physics ... to Petroleum Seismology publisher Society of Exploration Geophysicists isbn 1 56080 129 8 Cite ... more details
In reflection seismology , a flat spot is a seismic attribute anomaly that appears as a horizontal reflector cutting across the stratigraphy elsewhere present on the seismic image. ref name Gluyas Cite book author Gluyas, J., Swarbrick, R. year 2011 title Petroleum Geoscience edition 2nd publisher Blackwell Publishing isbn 978 0 632 03767 4 page 242 ref Its appearance can indicate the presence of hydrocarbons . Therefore it is known as a direct hydrocarbon indicator and is used by geophysicists in hydrocarbon exploration . Theory A flat spot can result from the increase in acoustic impedance when a gas filled porous rock with a lower acoustic impedance overlies a liquid filled porous rock with a higher acoustic impedance . It may stand out on a seismic image because it is flat and will contrast with surrounding dipping reflections. ref Cite book author Sheriff, R. E., Geldart, L. P. year 1995 title Exploration Seismology edition 2nd publisher Cambridge University Press isbn 0 521 46826 4 page 416 ref Caution There are a number of other possible reasons for there being a flat spot on a seismic image. It could be representative of a mineralogical change in the subsurface or an unresolved shallower multiple. Additionally, the interpretation of a flat spot should be attempted after depth conversion to confirm that the anomaly is actually flat. ref name Gluyas See also Bright spot Seismic attribute Reflection seismology References Reflist Category Seismology measurement Category Petroleum geology ... more details
Infobox government agency agency name Philippine Institute of Volcanology and Seismology nativename Suriang Pilipino ng Bulkanolohiya at Sesmolohiya nativename a nativename r logo Phivolcslogo.svg 200px logo width logo caption seal seal width seal caption formed September 17, 1982 preceding1 preceding2 dissolved superseding Volcanoes and Earthquakes jurisdiction headquarters C.P. Garcia Avenue, UP Diliman , Quezon City latd latm lats latNS longd longm longs longEW region code employees budget minister1 name minister1 pfo minister2 name minister2 pfo chief1 name Renato Solidum chief1 position Director chief2 name chief2 position parent agency Department of Science and Technology Philippines Department of Science and Technology child1 agency child2 agency website URL www.phivolcs.dost.gov.ph footnotes The Philippine Institute of Volcanology and Seismology lang fil Suriang Pilipino ng Bulkanolohiya at Sesmolohiya , abbreviated as PHIVOLCS is a Philippines Philippine national institution dedicated to provide information on the activities of volcano es, earthquake s and tsunami s, as well as other specialized information and services primarily for the protection of life and property and in support of economic, productivity and sustainable development. It is one of the service agencies ... and Seismology or PHIVOLCS. NSTA, the umbrella department for PHIVOLCS and PAG ASA became ... of Volcanology and Seismology provides a classification system for the volcanoes of the country. ref ... view&id 57&Itemid 114 Philippine Institute of Volcanology and Seismology PHIVOLCS Active Volcano ... Institute of Volcanology and Seismology PHIVOLCS Potentially Active Volcano list http www.phivolcs.dost.gov.ph ... and Seismology PHIVOLCS Inactive Volcano list http www.phivolcs.dost.gov.ph index.php?option ... Institute Of Volcanology And Seismology Category Government of the Philippines Category Volcanoes of the Philippines nl Philippine Institute of Volcanology and Seismology tl Suriang Pilipino ng ... more details
barelinks date June 2011 Infobox company company name ESG Solutions company logo Image Esg solutions logo.gif 230px company type Private foundation 1993 location Kingston, Ontario Kingston , Ontario , Canada key people Ted Urbancic small Executive VP small , Cezar Trifu small Executive VP small , James Alexander small Executive VP small , Ken Arnold small chief executive officer CEO small area served Global industry List of oilfield service companies Oil services , Mine services products Microseismic instrumentation and Geophysics Geophysical services parent subsid homepage http www.esgsolutions.com www.esgsolutions.com intl yes ESG Solutions Engineering Seismology Group or ESG is a geophysical products and services company specializing in microseismic monitoring. ESG manufactures and installs microseismic instrumentation and performs microseismic data processing and interpretation services. It is headquartered in Kingston, Ontario Kingston , Ontario , Canada , with offices in Calgary , Houston , Denver , Amsterdam , Dubai , Beijing and Changsha . History ESG Solutions was founded in 1993 as Engineering Seismology Group Inc. The company performs microseismic monitoring services for the oil and gas, mining and geotechnical industries, but its roots lie in microseismic monitoring for the Canadian mining industry. The group was loosely formed out of the Engineering Seismology Lab at Queen s University in Kingston, Ontario Kingston , Ontario , Canada that was performing research on a form of seismology called microseismics, or passive seismic . Early History in the Mining Industry Microseismic science is the study of very small scale earthquake s that are induced by industrial processes such as mining or oil production. In the 1980s, many mines in northern Ontario were experiencing increased seismic activity, including a large rockburst which killed 4 miners in Greater Sudbury Sudbury in 1984. ref Greater Sudbury. Wikipedia. Online http en.wikipedia.org wiki Greater Sud ... more details
International Institute of Earthquake Engineering and Seismology IIEES is an international earthquake engineering and seismology institute based in Iran . It was established as a result of the 24th UNESCO General Conference Resolution DR 250 under Iranian government approval in 1989. It was founded as an independent institute within the Iran s Ministry of Science, Research and Technology. ref name IIEES cite web url http www.iiees.ac.ir English institute eng about.html title About Institute publisher International Institute of Earthquake Engineering and Seismology accessdate November 23, 2008 archiveurl http web.archive.org web 20080606002635 http www.iiees.ac.ir English institute eng about.html Bot retrieved archive archivedate June 6, 2008 ref On its establishment, the IIEES drew up a seismic code in an attempt to improve the infrastructural response to earthquakes and seismic activity in the country. Its primary objective is to reduce the risk of seismic activity on buildings and roads and provide mitigation measures both in Iran and the region. ref name IIEES The institute is responsible for much of the research and education in this field by conducting research and providing education and knowledge in Seismotectonics seismotectonic studies, seismology and earthquake engineering. ref name IIEES In addition conducts research and educates in risk management and generating possibilities for an effective earthquake response strategy. The IIEES is composed of the following research Centers Seismology, Geotechnical Earthquake Engineering, Earthquake engineering research Structural Earthquake Engineering , Risk Management National center for Earthquake Prediction, and Graduate School, Public Education and Information Division. ref name IIEES See also 2003 Bam earthquake Bahram Akasheh Earthquake Engineering Research Institute National Center for Research on Earthquake Engineering References reflist External links http www.iiees.ac.ir Official site Persian http www.iiees.ac.ir ... more details
POLARIS is an underground experiment to observe seismic signals at depth in very hard rock. It is one of the current projects at SNOLAB in Canada ref http snolab2006.snolab.ca talks pups1.ppt SNOLAB presentation ref . References reflist DEFAULTSORT Polaris Category Geology Geology stub ... more details
Baya is an inactive volcano in Ganassi municipality, Lanao del Sur province, Philippines . Philippine Institute of Volcanology and Seismology Phivolcs lists Baya as Inactive . ref http volcano.phivolcs.dost.gov.ph VolInactive.htm Philippines Institute of Volcanology and Seismology Phivolcs List of Inactive Volcanoes ref References reflist See also Inactive volcanoes of the Philippines List of volcanoes in the Philippines Pacific ring of fire Volcano Lanao del Sur Northern Mindanao coord missing Philippines Category Volcanoes of Mindanao Category Inactive volcanoes of the Philippines ... more details
Orphan date December 2010 File Geysers on Mars.jpg thumb Artist concept showing Geysers on Mars A Sand Geyser or Sand Fountain is a Geology geologic phenomena which occurs in association with earthquake s and other Seismology seismic events . ref http www.postandcourier.com news 2007 jun 12 old sand geyser shows quakes part life here ref ref http findarticles.com p articles mi m1200 is 2 166 ai n6137871 ref References references DEFAULTSORT Sand Geyser Category Seismology and earthquake terminology geology stub ... more details
PGV may refer to Strong ground motion Peak Ground Velocity in seismology Pitt Greenville Airport PhpGedView , web based genealogy software disambig Long comment to avoid being listed on short pages it PGV ... more details
Reynir B dvarsson is an Iceland ic seismologist working at Uppsala University in Sweden. B dvarsson is responsible for the Swedish National Seismology Network. External http www.geo.uu.se Default.aspx?pageid 1&lan 0 Seismology Institute Uppsala University http www.geofys.uu.se snsn Swedish National Seismology Net Homepage Persondata Metadata see Wikipedia Persondata . NAME Bodvarsson, Reynir ALTERNATIVE NAMES Reynir Eyvindur B varsson SHORT DESCRIPTION DATE OF BIRTH 02.12.1950 PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Bodvarsson, Reynir Category Living people Category Year of birth missing living people Category Uppsala University faculty Category Seismologists Category Icelandic scientists Category Icelandic expatriates in Sweden Iceland bio stub sv Reynir B varsson ... more details
A sonogram may refer to the following A diagnostic medical image created using ultrasound echo sonographic equipment, see medical ultrasonography An image that shows how a signal varies with time, also known as a spectrogram , used to identify phonetic sounds, to analyse the cries of animals, and in the fields of music, sonar radar, speech processing and seismology. S.O.N.O.G.R.A.M. , an album by One Be Lo disambig ... more details
Orphan date November 2006 In reflection seismology , stacking velocity is the value of velocity obtained from the best fit hyperbola analysis. References http www.glossary.oilfield.slb.com Display.cfm?Term stacking 20velocity Schlumberger Oilfield Glossary DEFAULTSORT Stacking Velocity Category Geology Geology stub ... more details
Cleanup date September 2009 The following articles relate to the volcanos of the Philippines Erupting volcanoes in the Philippines Active volcanoes in the Philippines Potentially active volcanoes in the Philippines Inactive volcanoes in the Philippines Philippine Institute of Volcanology and Seismology DEFAULTSORT Volcanoes In The Philippines Category Volcanoes of the Philippines Volcanology stub ... more details
for the island in Indonesia Buton Butung is an inactive volcano , elevation 684 metres above mean sea level ASL , located at 7.75 N, 125.083 E, in Maramag, Bukidnon Maramag Municipality, Bukidnon Philippine Province Province , island of Mindanao , in the Philippines . The Philippine Institute of Volcanology and Seismology Phivolcs lists Butung as Inactive . ref http volcano.phivolcs.dost.gov.ph VolInactive.htm Philippine Institute of Volcanology and Seismology Phivolcs List of Inactive Volcanoes ref References reflist See also Inactive volcanos in the Philippines Volcanos in the Philippines Pacific ring of fire Volcano Bukidnon Northern Mindanao Mindanao coord 7.75 N 125.083 E Category Volcanoes of Mindanao Category Inactive volcanoes of the Philippines ... more details
A characteristic earthquake is a repeating, large earthquake that occurs more frequently than local Seismology seismic monitoring would suggest. http www.earth.northwestern.edu people seth research eqrec.html Characteristic earthquakes are usually defined from paleoseismology observations. This has important implications for seismic hazard calculations and earthquake insurance rates . Basically, it implies that there is a section of a Fault geology fault that has very little observed seismicity, but is a high hazard because the paleoseismic studies show a regular pattern of large earthquakes. References Reflist Unreferenced date January 2010 Category Seismology geophysics stub ja ... more details
Multiple issues orphan October 2011 expert May 2011 unreferenced May 2011 null date May 2011 SKS waves seismology are a type of Seismic wave waves that initially travel as S waves shear wave s through Earth s outer core , and then arrive again as S waves. However, because S waves cannot travel through the liquid outer core, they transform into P wave s, and when they leave the outer core, they return to their initial form. However, for the time in which it is traveling through the outer core, the wave is called K wave K , hence the name SKS. Category Seismology ... more details
File Reflection at an interface.png thumb Diagram showing the mode conversions that occur when a P wave reflects off an interface at non normal incidence In geophysics , Knott s equations were the first equations to describe the amplitudes of reflected and refracted waves generated at non normal incidence upon an interface. ref name SheriffGeldart Sheriff, R. E., Geldart, L. P., 1995 , 2nd Edition. Exploration Seismology. Cambridge University Press. ref They were derived in 1899 by the British geophysicist Cargill Gilston Knott using displacement potential functions and describe the same phenomenon that the Zoeppritz equations describe in terms of amplitude displacements. References reflist Category Seismology measurement Category Petroleum geology ... more details
orphan date April 2010 refimprove date April 2010 In seismology , a seismic trace refers to the recorded curve from a single seismometer seismograph when measuring ground movement. The name comes from the curve plotted by a seismograph as the paper roll rotated and the needle left a trace from which information about the subsurface could be extracted. Today s instruments record the data digitally and the word trace has come to mean the digital curve. Complex seismic trace The recorded seismic trace is considered the real number real part of the complex number complex trace. By phase shifting the recorded trace by 90 degrees, we can obtain the imaginary number imaginary part of the complex trace. The complex seismic trace is a complex function whose real and imaginary part are the previously mentioned ref name Barnes cite journal last Barnes first A.E. year 2007 title A tutorial on complex seismic trace analysis journal Geophysics volume 72 pages W33 W43 ref . From the complex trace, one can now define seismic attribute s such as the complex amplitude, phase, instantaneous phase and instantaneous frequency. References Reflist Category Seismology measurement Category Seismology ... more details
Unreferenced stub auto yes date December 2009 Orphan date February 2009 A teleseism is the tremor caused by an earthquake that is very far away, often picked up only by seismometer s that are in low background noise locations. Generally, a tremor from a Richter magnitude scale magnitude 5.3 earthquake can be seen anywhere in the world with modern seismic instruments. Category Seismology and earthquake terminology Geophysics stub ... more details
Body wave may refer to one of the following Body wave seismology , a type of seismic wave s Body wave dance move Body wave hair style Body wave locomotion Body Wave novel , a 2003 novel by Nancy J. Cohen Nancy Cohen Body Wave Inversion Bench , exercise equipment Body Waves , a 1992 comedy film disambig ... more details
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