Intraplate earthquakes or related to mantle convection
Scientists at the University of Southern Calif have found that earthquakes
in the plate are related to mantle convection. This study provides a more
reasonable explanation for the cause of the intraplate earthquakes.
Related papers published in the latest issue of nature magazine.
Earthquake is a vibration phenomenon caused by the rapid release of energy
from the earth's crust. It is considered as the main cause of the earthquake
that the plate edge and the inner plate is disturbed and broken. But in the
west of the United States, some areas far away from the plate boundary are
also prone to earthquakes.
The earth scientist Thorsten Beck and his team have used the latest mantle
flow model to calculate the spatial distribution of seismic activity in the
western United states. It is found that the material movement and convection
in the mantle, especially the active upwelling of the mantle, can also cause earthquakes.
The researchers said that in the western United States, the seismic activity
within the plate mainly concentrated in the mountains from north to south.
The seismic activity analysis method used in this study can also be applied
to other areas with Continental deformation.
This study shows that earthquakes within this plate are related to the convection
of the mantle beneath the earth's crust. Mantle convection plays a key role in the
formation of landforms, the deformation of the continent, and the triggering of
tectonic plate earthquakes. This study is of great value for people to understand
the causes and hazards of the intraplate earthquakes.