Based On OKADA Model To Explore The Impact Of Large Earthquakes On Frame Points

It is self-evident significant that dislocation theory is used to study the focal mechanism, forecasting earthquakes, volcanic activities and inversion of the faults using geodetic and geophysical information. China is one of the world’s frequent seismic activity country, So there are a lot of achievements in earthquake research, such as the change of observation data and change rule at the initial stage of earthquake, coseismal and post-earthquake recovery phase and the influence of ITRF frame point.By OKADA model this paper simulated three levels of seismic fault rupture surfaceanalyzed the influence sphere of earthquakes on the frame using the ideal data. The three levels are Mw7.0, Mw7.5, Mw8.0 and their influence sphere are 120 km,300 km,500 km. The academic research results are helpful to the emergency recovery of all aspects after the earthquake. It also calculated and analyzed the Miyagi earthquake (2011) data through OKADA model and came to a conclusion: there is trifling influence on the frame point close to Japan in northeast China, but can’t exert a huge impact on the regionalseismic activity. Themain achievements of this paper are as follows:1) First, Mw 7.0 earthquake can cause the change of coseismal address on cm level and the scope of influence to the epicenter is about 150 km. So the users for the cm level frameworkneed to restore the epicenter within 100 km of frame stand.2)Mw 7.5 earthquake can cause the change of coseismal address on cm level and the scope of influence to the epicenter is about 320 km. So the users for the cm level frameworkneed to restore the epicenter within 180km of frame stand.3) Mw 8.0 earthquake can cause the change of coseismal address on cm level and the scope of influence to the epicenter is about 550 km. So the users for the cm level frameworkneed to restore the epicenter within 300km of frame stand.4) Forth, the calculating data of Japan’s miyagi earthquake shows that Miyagi earthquake caused mm ～ cmmagnitude of coseismal displacement in the northeast and north of our country. It did not form a big impact on our reference frame.