scholarly journals EVOLUTION OF LANDSCAPE-CLIMATIC CHANGES ON THE SOUTH SAKHALIN IN THE ATLANTIC PERIOD OF HOLOCENE

2020 ◽  
pp. 124-131
Author(s):  
Yu.A. Mikishin
Keyword(s):  
Climatic Changes ◽  
The South ◽  
Atlantic Period ◽  
South Sakhalin

The source rocks in the southwestern part of the South Sakhalin Basin

2017 ◽  
Vol 72 (1) ◽  
pp. 63-74
Author(s):  
T. A. Kiryukhina ◽  
S. I. Bordunov ◽  
A. A. Solov’eva
Keyword(s):  
Source Rocks ◽  
The South ◽  
Southwestern Part ◽  
South Sakhalin

scholarly journals Monitoring of the geomagnetic and geoelectric field in two regions of Greece for the detection of earthquake precursors

1997 ◽  
Vol 40 (2) ◽  
Author(s):  
G. Vargemezis ◽  
J. Zlotnicki ◽  
G. Tsokas ◽  
B. C. Papazachos ◽  
E. E. Papadimitriou
Keyword(s):  
Climatic Changes ◽  
Earthquake Precursors ◽  
Geoelectric Field ◽  
The South ◽  
Temperature Changes ◽  
Central Greece ◽  
South Eastern ◽  
Precursory Phenomena ◽  
Of Greece ◽  
High Seismicity

Two magnetotelluric stations have been installed in the South-Eastern Thessaly basin (Central Greece), which have recorded the geomagnetic and geoelectric fields since 1993. The aim is to detect long lasting abnormal changes of the geoelectric field which may be due to impending earthquakes. The geoelectric recordings were checked against the climatic changes such as temperature changes and precipitation and no correlation was observed. Ten anomalies were observed with characteristics similar to seismoelectric signals which have been reported in the literature and thus we can assume that these changes constitute precursory phenomena. The duration of these signals varies from several days to a few weeks. Some of them keep on developing until the occurrence of an earthquake, and others appear like transient changes several days before. The high seismicity of the area where the stations are located creates difficulties in the correlation of the signals with certain shocks.

scholarly journals The New Avalanche-Like Stochastic Model for Parameterization of Seismicity and Its Application to the South Sakhalin Island Seismicity

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
M. V. Rodkin ◽  
I. N. Tikhonov
Keyword(s):  
Stochastic Model ◽  
Hierarchical Structure ◽  
Strong Earthquake ◽  
Sakhalin Island ◽  
Seismic Process ◽  
The South ◽  
Anomalous Increase ◽  
Seismic Regime ◽  
South Sakhalin ◽  
Two Parameters

Seismic process is usually considered as an example of occurrence of the regime of self-organizing criticality (SOC). A model of seismic regime as an assemblage of randomly developing episodes of avalanche-like relaxation, occurring at a set of metastable subsystems, can be the alternative of such consideration. The model is defined by two parameters characterizing the scaling hierarchical structure of the geophysical medium and the degree of metastability of subsystems of this medium. In the assemblage, these two parameters define a modelb-value. An advantage of such approach consists in a clear physical sense of parameters of the model. The application of the model for parameterization of the seismic regime of the south part of Sakhalin Island is considered. The models of space changeability of the scaling parameter and of temporal changeability of the parameter of metastability are constructed. The anomalous increase of the parameter of metastability was found in connection with the Gornozavodsk and Nevelsk earthquakes. At the present time, high values of this parameter occur in the area of the Poyasok Isthmus. This finding is examined in comparison with other indications of an increase in probability of occurrence of a strong earthquake in the South Sakhalin region.

The Expanding Sahara

1974 ◽  
Vol 1 (1) ◽  
pp. 5-13 ◽  
Author(s):  
J. L. Cloudsley-Thompson
Keyword(s):  
Human Activities ◽  
Shifting Cultivation ◽  
Human Population ◽  
Arid Regions ◽  
Climatic Changes ◽  
The South

The belts of savanna lying to the south of the Sahara are described. Evidence is then presented which suggests that these have been created from forest by shifting cultivation and the use of fire: they have probably developed contemporaneously with the evolution of Man and increase in human population. The effect of climatic changes in creating desert are discussed, and the conclusion is reached that present conditions in much of the Sahara have been engendered almost entirely by human activities. These include felling of trees for firewood and charcoal, or to make their leaves accessible to stock in times of drought and, even more important, overgrazing—especially by goats. Finally, it is suggested that, in the long term, agriculture may not be the most promising way of developing arid regions. Overstocking the savanna and desert must inevitably lead to disaster.

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