Zobrazeno 1 - 10
of 56
pro vyhledávání: '"G. P. GREGORI"'
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 10, Iss 2, Pp 319-337 (2010)
Acoustic emission (AE) displays violent paroxysms preceding strong earthquakes, observed within some large area (several hundred kilometres wide) around the epicentre. We call them "storms of crustal stress" or, briefly "crustal storms". A few case h
Externí odkaz:
https://doaj.org/article/6bae82e4eb0c48789c512d227fe1c9d0
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 7, Iss 6, Pp 723-731 (2007)
A new kind of data analysis is discussed – and a few case histories of actual application are presented – concerning the physical information attainable by acoustic emission (AE) records in geodynamically active or volcanic areas. The previous an
Externí odkaz:
https://doaj.org/article/4ba8bb6a9c5a4868a2ec9be705703b10
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 6, Iss 6, Pp 961-971 (2006)
The stress propagation through the crust can be effectively monitored by means of acoustic mission (AE) techniques (ultrasounds). The extit{AE} intensity is indicative of the amount of stress that affects some lithospheric and/or crustal slab of some
Externí odkaz:
https://doaj.org/article/80d5a17a10c343f2a08e4f45565d67da
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 5, Iss 6, Pp 777-782 (2005)
Intense crises of crustal stress appear to cross large regions, and to precede by several months the eventual occurrence of some strong earthquake within them. The phenomenon is not linear, and the stress control reflects some wide scale-size rather
Externí odkaz:
https://doaj.org/article/82fdaa78aecb4bf4a961732ff8e6deda
Publikováno v:
Annals of Geophysics, Vol 45, Iss 2 (2002)
Acoustic Emissions (AE) are effective for monitoring ground deformation and temporal variation of its porosity. AE are complementary to seismic information, related to the same area, though AE and earthquakes focus on observational evidence concerned
Externí odkaz:
https://doaj.org/article/e7c13424cca74a8f860a92db6162b963
Publikováno v:
Annals of Geophysics, Vol 42, Iss 2 (1999)
The separation of the field produced by different internal sources can be accomplished by means of the so-called spatial spectrum of the geomagnetic field of internal origin. It is shown how such a rationale, when suitably interpreted, allows to reco
Externí odkaz:
https://doaj.org/article/56633843359d44b0ab926c45e377a7d4
Autor:
G. P. Gregori
Publikováno v:
Annals of Geophysics, Vol 42, Iss 2 (1999)
No average status can be defined for the sources of the external magnetic field over the polar caps, no index can provide with any such model, the observation of no single quantity or parameter can give the ultimate solution. Rather, every case histo
Externí odkaz:
https://doaj.org/article/d502ade0d33e4db4ab876087b2353958
Autor:
G. P. Gregori
Publikováno v:
Annals of Geophysics, Vol 41, Iss 5-6 (1998)
A frequent approach when attempting to manage a natural catastrophe is in terms of a numerical model, by which we try to forecast its occurrence in space and time. But, sometimes this is difficult or even unrealistic. On more pragmatic grounds we can
Externí odkaz:
https://doaj.org/article/e69b24d4661d4dc182f175be56cc40d1
Autor:
W. Dong, G. P. Gregori
Publikováno v:
Annals of Geophysics, Vol 39, Iss 1 (1996)
The correlation between geomagnetic field reversals and volcanism is investigated, according to the speculated consequence on volcanoes of the transient electric currents in the geodynamo, through Joule's heating, before and after every reversal even
Externí odkaz:
https://doaj.org/article/31e9b04f379e4a4c87e06a9c602039bb
Autor:
G. P. Gregori
Publikováno v:
Annals of Geophysics, Vol 37, Iss 5 Sup. (1994)
A model is investigated, by which the encounters of the solar system with dense interstellar clouds ought to trigger either geomagnetic field reversals or excursions, that produce extra electric currents within the Earth dynamo, that cause extra Joul
Externí odkaz:
https://doaj.org/article/72541092c95441618b42123f03304f0f