Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Thomas Forbriger"'
Publikováno v:
Geofísica Internacional, Vol 59, Iss 2, Pp 101-104 (2020)
Con base a la fórmula que determina la velocidad de grupo de las ondas sísmicas y utilizando resultados previamente publicados por los autores, se discute en forma teórica la ocurrencia de velocidades de grupo negativas de ondas de Rayleigh en mod
Externí odkaz:
https://doaj.org/article/d6bf6e6977e144e2963345a9db772343
Publikováno v:
Geofísica Internacional, Vol 56, Iss 1, Pp 7-12 (2017)
Contrario a lo que normalmente es asumido en sismologia, la fase-velocidad de olas Rayleigh no necesariamente es una función de valor único de frecuencia. Se demuestra esto para el primer modo más alto en modelos simples de una capa homogénea enc
Externí odkaz:
https://doaj.org/article/dc2a0b5c98404d798c4dea15246c5a2d
Publikováno v:
Geophysical Journal International. 233:2269-2279
SUMMARY Contrary to popular belief in seismology, the vertical component seismic background level of Earth’s body in the normal-mode band is lower than current low-noise models would indicate. With a correction of atmospherically induced disturbanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82f4006f34a7520fd4f6dbb2c3e825c4
https://doi.org/10.1093/gji/ggad052
https://doi.org/10.1093/gji/ggad052
Since the times of Doodson it has been established that a record of length T is required to resolve tidal harmonics with a frequency separation 1/T. This rule, known as Rayleigh criterion, does not consider the actual resolution provided by the signa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2742fcf99d89742594a26bc36ee8bba8
https://doi.org/10.5194/egusphere-egu23-825
https://doi.org/10.5194/egusphere-egu23-825
We describe a new harmonic tidal analysis method, which constrains the solution to be near a reference model. This regularization stabilizes the linear regression, allowing us to infer model parameters for each tidal harmonic. This overcomes the need
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ede8ebff8a8b9d7588fbc2c02db4a87
https://doi.org/10.21203/rs.3.rs-2539898/v1
https://doi.org/10.21203/rs.3.rs-2539898/v1
Autor:
Nasim Karamzadeh Toularoud, Ya-Jian Gao, Jérôme Azzola, Thomas Forbriger, Rudolf Widmer-Schnidrig, Emmanuel Gaucher, Andreas Rietbrock
The application of distributed acoustic sensing (DAS) in seismology is rapidly expanding due to its ability to perform a large number of high-density measurements, i.e., distributed sensing, without using many point sensors, which is cost-effective.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a3296eba28c8bdf138a01f285e0f674
https://publikationen.bibliothek.kit.edu/1000157451/150527871
https://publikationen.bibliothek.kit.edu/1000157451/150527871
Autor:
Jérôme Azzola, Nasim Karamzadeh Toularoud, Emmanuel Gaucher, Thomas Forbriger, Rudolf Widmer-Schnidrig, Felix Bögelspacher, Michael Frietsch, Andeas Rietbrock
We present an original DAS measurement station, equipped with the Febus A1-R interrogator, which has been deployed at the Black Forest Observatory (Schiltach, Germany). The objective of this deployment is twofold. The first is to test the deployed fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::314a59ee4c87595280ceedf9756d768d
https://doi.org/10.5194/egusphere-egu22-6976
https://doi.org/10.5194/egusphere-egu22-6976
Publikováno v:
Geophysical journal international, 222 (1), 582-594
Other than commonly assumed in seismology, the phase velocity of Rayleigh waves is not necessarily a single-valued function of frequency. In fact, a single Rayleigh mode can exist with three different values of phase velocity at one frequency. We dem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7828d5fd3f8c7fc43246c07c9e945dc9
https://doi.org/10.1093/gji/ggaa123
https://doi.org/10.1093/gji/ggaa123
Autor:
Adam Ciesielski, Thomas Forbriger
Harmonic tidal analysis bases on the presumption that since short records and close frequencies result in an ill-conditioned matrix equation, a record of length T is required to distinguish harmonics with a frequency separation of 1/T (Rayleigh crite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e1c7aabe9b0d5d41514964128b0a9bd
https://doi.org/10.5194/egusphere-egu21-14747
https://doi.org/10.5194/egusphere-egu21-14747
Publikováno v:
Geophysical journal international, 228 (2), 927–943
SUMMARY Tilting of the ground due to loading by the variable atmosphere is known to corrupt very long period horizontal seismic records (below 10 mHz) even at the quietest stations. At BFO (Black Forest Observatory, SW-Germany), the opportunity arose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a85d4ef984db90dcd6199633b53ca98