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VAN Method
The VAN method – named after P. Varotsos, K. Alexopoulos anK. Nomicos authors of the 1981 papers describing it – measures low frequency electric signals, termed "seismic electric signals" (SES), by which Varotsos and several colleagues claimed to have successfully predicted earthquakes in Greece. Both the method itself and the manner by which successful predictions were claimed have been severely criticized. Supporters of VAN have responded to the criticism but the critics have not retracted their views.twenty articles in a special issue of Geophysical Research Letterstable of contents Since 2001, the VAN group has introduced a concept they call "natural time", applied to the analysis of their precursors. Initially it is applied on SES to distinguish them from noise and relate them to a possible impending earthquake. In case of verification (classification as "SES activity"), natural time analysis is additionally applied to the general subsequent seismicity of the area associ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panayotis Varotsos
Panayiotis Varotsos (; born November 28, 1947 in Patras) is a Greek physicist and former professor in the Department of Physics of the University of Athens, notable for his VAN method to predict earthquakes. His group claims the ability to identify electromagnetic signals that are precursors to earthquakes. They suggest the precursors are generated by electricity from piezo-stimulated effects in rocks being stressed just prior to the earthquake rupture. Onassis Foundation Laureate for the Environment (1995). Also awarded by the Academy of Athens (1978) and Empeirikion Foundation (1986). In 2016 the Union of Greek Physicists honoured him for his work with a prize delivered by the President of Greece. Works * * * References Further reading * Physics Web''Maxwell Equations and Earthquakes, News from VAN Research Group'' May 2004 (in Greek). Retrieved on 07-08-2016 from Physics4u. * New Scientist Environment''Heartbeats warn of sudden death risk'' March 31, 2004. Retrieved on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a Fracture (geology), planar fracture or discontinuity in a volume of Rock (geology), rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust (geology), crust result from the action of Plate tectonics, plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction, subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the Plane (geometry), plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geological maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eos (magazine)
''Eos'' (formerly ''Eos, Transactions, American Geophysical Union'') is the news magazine published by the American Geophysical Union (AGU). The magazine publishes news and opinions relevant to the Earth and space sciences, as well as in-depth features on current research and on the relationship of geoscience to social and political questions. ''Eos'' is published online daily, and as an AGU member benefit in 11 issues a year. It accepts both display and classified advertising. History ''Transactions, American Geophysical Union'', began as a way to distribute information about AGU's annual meetings. Launched in 1920, the first volume was reprinted from volume 6, number 10 of the ''Proceedings of the National Academy of Sciences'' as ''National Research Council Reprint and Circular Series'', number 11, and appeared under the title ''Scientific papers presented before the American Geophysical Union''. It compiled papers from AGU's second annual meeting. These transactions were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geophysical Journal International
''Geophysical Journal International'' (GJI) is a monthly Peer review, peer-reviewed scientific journal in the field of geophysics. It is published by Oxford University Press on behalf of two learned societies: the Royal Astronomical Society (RAS) and the Deutsche Geophysikalische Gesellschaft (German Geophysical Society, DGG), who select and peer-review the contents. GJI was formed in 1988 by the merger of three earlier geophysics journals, the oldest of which was established in 1922. The editor-in-chief is Joerg Renner (Ruhr University Bochum). The journal publishes original research papers, research notes, letters, and book reviews. Its topical scope includes research on all aspects of theoretical, computational, applied and observational geophysics. History GJI was formed by a complex series of mergers between previous geophysical journals. Its origins can be traced to 1919, when the RAS absorbed the Geophysical Committee (which had previously been part of the British Assoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismo-electromagnetics
Seismo-electromagnetics are various electro-magnetic phenomena believed to be generated by tectonic forces acting on the Earth's crust, and possibly associated with seismic activity such as earthquakes and volcanoes. Study of these has been prompted by the prospect they might be generated by the increased stress leading up to an earthquake, and might thereby provide a basis for short-term earthquake prediction. However, despite many studies, no form of seismo-electromagnetics has been shown to be effective for earthquake prediction. A key problem is that earthquakes themselves produce relatively weak electromagnetic phenomena, and the effects from any precursory phenomena are likely to be too weak to measure. Close monitoring of the Parkfield earthquake revealed no significant pre-seismic electromagnetic effects. However, some researchers remain optimistic, and searches for seismo-electromagnetic earthquake precursors continue. VAN method The VAN method – named after P. Var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismology
Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic waves through planetary bodies. It also includes studies of the environmental effects of earthquakes such as tsunamis; other seismic sources such as volcanoes, plate tectonics, glaciers, rivers, oceanic microseisms, and the atmosphere; and artificial processes such as explosions. Paleoseismology is a related field that uses geology to infer information regarding past earthquakes. A recording of Earth's motion as a function of time, created by a seismograph is called a seismogram. A seismologist is a scientist who works in basic or applied seismology. History Scholarly interest in earthquakes can be traced back to antiquity. Early speculations on the natural causes of earthquakes were included in the writings of Thales of Miletu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
President Of Greece
The president of Greece, officially the president of the Hellenic Republic (), commonly referred to in Greek as the president of the Republic (, ΠτΔ), is the head of state of Greece. The president is elected by the Hellenic Parliament; the role has been mainly ceremonial since the 1986 constitutional reform. The office was formally established by the Constitution of Greece in 1975, but has antecedents in the Second Hellenic Republic of 1924–1935 and the Greek junta in 1973–1974 which predated the Metapolitefsi, transition to the current Third Hellenic Republic. Powers The president is the nominal commander-in-chief of the Greek Armed Forces and occupies the first place in the country's order of precedence. Although the Greek Constitution of 1974 vested the presidency with considerable powers on paper, in practice presidents took a largely ceremonial role; the Prime Minister of Greece, prime minister of Greece is the active chief executive of the Greek government an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detrended Fluctuation Analysis
In stochastic processes, chaos theory and time series analysis, detrended fluctuation analysis (DFA) is a method for determining the statistical self-affinity of a signal. It is useful for analysing time series that appear to be long-memory processes (diverging correlation time, e.g. power-law decaying autocorrelation function) or 1/f noise. The obtained exponent is similar to the Hurst exponent, except that DFA may also be applied to signals whose underlying statistics (such as mean and variance) or dynamics are non-stationary (changing with time). It is related to measures based upon spectral techniques such as autocorrelation and Fourier transform. Peng et al. introduced DFA in 1994 in a paper that has been cited over 3,000 times as of 2022 and represents an extension of the (ordinary) fluctuation analysis (FA), which is affected by non-stationarities. Systematic studies of the advantages and limitations of the DFA method were performed by PCh Ivanov et al. in a serie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telluric Current
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Telluric (from the Latin ''tellus'', "earth") may refer to several things related to the Earth: * Telluric current, a natural electric current in the Earth's crust * Telluric contamination, contamination of astronomical spectra by the Earth's atmosphere (also can be referred to as ''Telluric lines'' or ''Telluric bands'') *Telluric compound, a compound which contains tellurium in the +6 oxidation state * ''Telluric'' (album), a 2016 album by the Australian singer-songwriter Matt Corby Matthew John Corby (born ) is an Australian singer-songwriter. He achieved his commercial breakthrough with his fourth EP, ''Into the Flame'' (2011), which peaked at No. 3 on the ARIA Charts, ARIA Singles Chart, and by April 2012, was certi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Observatory Of Athens
The National Observatory of Athens (NOA; ) is a research institute in Athens, Greece. Founded in 1842, it is the oldest List of research institutes in Greece, research foundation in Greece. The Observatory was the first scientific research institute built after Greece became independent in 1829, and one of the oldest research institutes in Southern Europe. It was built around the same period as the United States Naval Observatory. The world-renowned Greek-Austrian astronomer Georgios Konstantinos Vouris lobbied to create the National Observatory of Athens in the newly founded state. He persuaded wealthy Greek-Austrian banker Georgios Sinas to pay for the new massive observatory. The Austrian-born Otto of Greece, Greek King found out the news and awarded Georgios Sinas's son the Order of the Redeemer. The King also selected the architects for the building under Georgios Konstantinos Vouris's supervision, which were Eduard Schaubert and Theophil Hansen. The Athens observatory sinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
