搜索结果: 61-75 共查到“理学 seismic”相关记录389条 . 查询时间(0.059 秒)
Energy and polarization of the telluric field in correlation with seismic activity in Greece
earthquake precursor telluric field electric field polarization
2015/9/28
Many attempts have been made to disclose anomalous changes of the electromagnetic field in relation with tectonic earthquakes. We tentatively develop a new approach based on the energy and polarity of...
Could ionospheric variations be precursors of a seismic event? A short discussion
Ionosphere seismic precursors
2015/9/28
A short review of published papers on the perturbations in the ionosphere due to seismogenic effects is reported. The method to correlate different classes of phenomena as ionospheric variations and s...
Tomographic analysis of self-potential data in a seismic area of Southern Italy
elf-potential tomographic technique fault system southern apennines
2015/9/28
The time and space anomalous behaviour of the Self-Potential (SP) field recorded in a seismic area of Southern Apennines, Italy, is discussed. The SP data were collected in the period June 1992-Novemb...
Evolution of magnetotelluric,total magnetic field,and VLF field parameters in Central Italy:relations to local seismic activity
Magnetotelluroc tectonomagnetism VLF waves
2015/9/28
Magnetotelluric data were collected at Collemeluccio (41.72°N, 14.37°E) in Central Italy from summer 1991 to spring 1998. Analyzed by means of tensor decomposition on the geoelectric potential and rob...
Seismic hazard assessment for the Sofia area
Seismic hazard assestement central-balkan neotectonic region seismicity attenuation relationships treatment of uncertainty
2015/9/28
The capital of Bulgaria, Sofia, is situated in the center of the so-called Sofia area. This is the most populated industrial and cultural region of Bulgaria that faces considerable earthquake risk. We...
On the estimate of earthquake magnitude at a local seismic network
southeastern Sicily digital seismic network magnitude
2015/9/28
We investigated possible uncertainties and biases of magnitude estimate arising from instrument characteristics, site conditions and routine data processing at a local seismic network running in South...
Disturbances in LF radio-signals as seismic precursors
radio signals seismicity precursors
2015/9/28
Low Frequency (LF) radio signals lie in the band 30-300 kHz. Monitoring equipment able to measure the electric strength of such signals, at field sites with very low noise levels, were designed and as...
Crustal structure at the western end of the North Anatolian Fault Zone from deep seismic sounding
north Anatolian fault zone crustal structure deep seismic sounding
2015/9/28
The first deep seismic sounding experiment in Northwestern Anatolia was carried out in October 1991 as part of the "German - Turkish Project on Earthquake Prediction Research" in the Mudurnu area of t...
Evaluation of the seismic hazard parameters for selected regions of the world:the maximum regional magnitude
maximum regional magnitude activity rate seismic hazard parameters seismic hazard level k-index circum-pacific belt
2015/9/28
Parameters of seismic hazard are estimated by the application of the maximum likelihood method. The technique is based on a procedure which utilizes data of different quality, e.g., the ones where the...
Discussion on telluric field and seismic activity in Central Greece
telluric earthquake precursors prediction
2015/9/28
Two stations were installed in the Southeastern Thessaly basin (Central Greece), recording the geomagnetic and telluric fields from 1993 to 1996. The aim was to detect long-term abnormal changes of th...
This paper deals with some fundamental considerations regarding the behaviour of geotechnical structures under seismic loading. First a complete definition of the earthquake disaster risk is provided,...
Earth modeling and estimation of the local seismic ground motion due to site geology in complex volcanoclastic areas
dynamic amplification factor seismic tomography pyroclastic rocks finite element method
2015/9/25
Volcanic areas often show complex behaviour as far as seismic waves propagation and seismic motion at surface are concerned. In fact, the finite lateral extent of surface layers such as lava flows, bl...
Anomalous crustal movements with low seismic efficiency-Campi Flegrei,Italy and some examples in Japan
crustal movements low seismic efficiency
2015/9/25
Campi Flegrei is a unique volcanic region located near Naples, Italy. Anomalous crustal movements at Pozzuoli in Campi Flegrei have been documented since the Roman period. The movements were gradual a...
A new strategy for the seismic assessment of existing RC buildings
seismic assessment vulnerability buildings
2015/9/25
This paper presents a new strategy for the seismic assessment of existing Reinforced Concrete (RC) buildings. The proposed method is based on a two steps approach. A field survey of some buildings is ...
Seismic reflection data processing in active volcanic areas: an application to Campi Flegrei and Somma Vesuvius offshore (Southern Italy)
marine geophysics seismic reflection
2015/9/25
The Campanian volcanism develops near the sea. Therefore, the geophysical study of the marine environment is a key to a better understanding of the tectonic evolution and the origin of volcanism in th...