Seismic Source Characteristics of Nine Strong Earthquakes from 1988 to 1990 and Earthquake Activity since 1970 in the Sichuan-Qinghai-Xizang (Tibet) Zone of China

2000 ◽  
Vol 157 (9) ◽  
pp. 1423-1443 ◽  
Author(s):  
Y. Gao ◽  
Z. Wu ◽  
Z. Liu ◽  
H. Zhou
Keyword(s):  
Seismic Source ◽  
Earthquake Activity ◽  
Strong Earthquakes ◽  
Source Characteristics

Strong earthquake activity influenced by solar flare intensity

2021 ◽  
Author(s):  
Gerald Duma
Keyword(s):  
Solar Flares ◽  
Strong Earthquake ◽  
Temporal Variations ◽  
Seasonal Effect ◽  
Earthquake Activity ◽  
Strong Earthquakes ◽  
International Service ◽  
Earthquake Frequency ◽  
Magnetic Index ◽  
Magnetic Disturbances

<p>Based on the comprehensive earthquake catalogue USGS ( HYPERLINK<span>  </span>https://earthquake.usgs.gov) the paper demonstrates that strong earthquake activity, seismic events with M≥6, exhibits a seasonal trend. This feature is the result of<span>  </span>analyses of earthquake data for the N- and S- Earth Hemisphere in period 2010-2019. It can be shown also for single earthquake prone regions as well, like Japan, Eurasia, S-America.</p><p>Any seasonal effect suggests an external influence. In that regard, one can think also of a solar-terrestrial effect, that is suggested already in several studies (e.g<span>  </span>M.Tavares, A.Azevedo, 2011; D.A.E. Vares, M.A.Persinger,2014; G.Duma, 2019). This assumption leads to the question: Which dynamic process can cause a trigger effect for strong earthquakes in the Earth's lithosphere.</p><p>In this study the intensity of solar flares and the resulting radiation, the solar wind, towards the Earth was taken into account. An appropriate parameter which has been regularity measured and reported for many decades and which reflects the intensity of solar radiation is the magnetic index Kp. It is measured at numerous geomagnetic observatories and describes the magnetic disturbances in nT within 3 hour intervals, respectively. Averages of all the measured 3-hour values are then published as Kp, therefore considered a planetary parameter (International Service of Geomagnetic Indices ISGI,France).</p><p>The temporal variations of strong earthquake activity over 10 years and their energy release was compared with the above mentioned index Kp. Actually, a distinct correlation between the two quantities, Kp and earthquake frequency, resulted in cases of different regions as well as globally. Another essential result of the study is that maxima of Kp preceed those of earthquake activity by about 60 to 80 days in most cases. The mechanism has not yet been modeled satisfactorily.</p>

Strong Motion Records of the 2002 Molise, Italy, Earthquake Sequence and Stochastic Simulation of the Main Shock

2004 ◽  
Vol 20 (1_suppl) ◽  
pp. 65-79 ◽  
Author(s):  
Antonella Gorini ◽  
Sandro Marcucci ◽  
Paolo Marsan ◽  
Giuliano Milana
Keyword(s):  
Strong Motion ◽  
Seismic Source ◽  
Stochastic Approach ◽  
Epicentral Area ◽  
Motion Data ◽  
Source Characteristics ◽  
Source Directivity ◽  
Field Radiation ◽  
Recorded Data ◽  
Strong Motion Network

The far field radiation inferred from accelerometric data recorded by the Italian Strong Motion Network (RAN) during the October 31, 2002, Molise, Italy, earthquake indicates a strong anisotropy in PGA distribution that presents its maximum values in the eastern part of the epicentral area. This study explores an interpretation of source directivity using a stochastic approach to produce synthetic seismograms accounting for source dimensions and rupture evolution. An E-W strike-slip fault, with a dip close to 90° and a fault plane size of (8×6) km2, reproduces satisfactorily both peak accelerations and spectral shapes of the recorded data when the rupture enucleates from the western edge at a depth of about 20 km and propagates eastward. This approach allows us to put constraints on seismic source characteristics and can be used to simulate ground motion for the most damaged areas where strong motion data are not available.

scholarly journals EFFECTS OF SEISMIC-SOURCE CHARACTERISTICS UNCERTAINTIES ON SEISMIC INTENSITY AND STRUCTURAL RESPONSE

2016 ◽  
Vol 81 (721) ◽  
pp. 425-435
Author(s):  
Sayaka IGARASHI ◽  
Shigehiro SAKAMOTO ◽  
Akemi NISHIDA ◽  
Ken MURAMATSU ◽  
Tsuyoshi TAKADA
Keyword(s):  
Structural Response ◽  
Seismic Source ◽  
Seismic Intensity ◽  
Source Characteristics

Seismic Source Characteristics of Nuclear and Chemical Explosions in Granite from Hydrodynamic Simulations

2012 ◽  
Vol 171 (3-5) ◽  
pp. 507-521 ◽  
Author(s):  
Heming Xu ◽  
Arthur J. Rodgers ◽  
Ilya N. Lomov ◽  
Oleg Y. Vorobiev
Keyword(s):  
Seismic Source ◽  
Hydrodynamic Simulations ◽  
Source Characteristics ◽  
Chemical Explosions

Seismic Source Characteristics of Nuclear Explosions in Water-filled Cavities

2001 ◽  
Vol 158 (11) ◽  
pp. 2105-2121 ◽  
Author(s):  
J. R. Murphy ◽  
D. D. Sultanov ◽  
N. Rimer ◽  
B. W. Barker
Keyword(s):  
Seismic Source ◽  
Nuclear Explosions ◽  
Source Characteristics

Seismic source characteristics of the 2016 Pedernales-Ecuador earthquake (Mw 7.8)

2021 ◽  
Vol 312 ◽  
pp. 106670
Author(s):  
César Jiménez ◽  
Miguel Saavedra J. ◽  
Nick Moreno
Keyword(s):  
Seismic Source ◽  
Source Characteristics
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