A Study on the Crust Deformation in and Around Korean Peninsula Using DGPS Data

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Cho, Jin-Dong and Park, Jun Ku

154 지구물리

Table 3 Measurement and Dynamics Models for the data processing.

Processing Mode •4 iteration postfit without decimation Observation Sampling Rate •30 sec

Elevation Cutoff Angle •15°

Constrained Parameters

•5 cm on IGS final orbit

•10 mas on IERS Bulletin_B Pole

•10 mas on IERS Bulletin_B UT

Major Correction Parameter

•IGS Antenna phase center model

•IGS Earth and Solar Radiation Pressure

•Matsumoto Ocean Tide Model

Mapping Function •Neils

Fig. 3 The components, time-series deformations and standard error at TSKB in Japan.

Fig. 2 The components, time-series deformations and standard error at SUWN in Korea.

northeastward in the eastern Part of northern China due to spreading of the East (Japan) Sea. The Armurian Block covering northeastern China, southeastern Siberia and the Korean Peninsula, is moving eastward as one of the con- sequences of the lateral expulsion of crustal blocks by the

Indian collision into Eurasia (Molnar and Tapponnier,

1975). The station velocity of TSKB and SHAO estimated

from GPS data compared with the velocities of corre-

sponding Tsukuba and Shanghai VLBI points obtained by

Heki (1996). The GPS velocities coincide well with the

A Study on the Crust Deformation In and Around Korean Peninsula Using DGPS Data

Fig. 4 The components, time-series deformations and standard error at BJFS in China.

Fig. 5 The components, time-series deformations and standard error at IRKT in Russia.

Table 4 The relative horizontal crust deformation value of station velocity vector based on the SUWN station.

Ref. Station Ve Vn dVe dVn Ven Azimuth

SUWN 0.00 0.00 0.00 0.00 0.00 0

00'00.00"

DAEJ -0.55 -0.71 1.58 1.29 0.90 217

45'47.00"

TSKB -31.90 2.28 2.73 2.29 31.98 274

05'17.41"

SHAO 4.91 1.76 3.92 2.60 5.22 70

16'46.82"

BJFS 5.95 1.49 3.12 2.74 6.13 75

56'27.96"

WUHN 9.28 -4.72 3.86 3.06 10.41 116

57'31.70"

IRKT -0.01 3.72 2.23 1.67 3.72 359

50'45.50"

Ve and Vn are East and North component of station relative velocity vectors based on the SUWN GPS reference station., dVe and dVn are the standard deviation of East and North components., Ven is velocity., Unit: (mm/yr).

VLBI velocities within the uncertainty.

Figs. 6, 7 and Table 4, 5 shows the relative deformation value of horizontal station velocity vector based on the SUWN station (95%) and the absolute deformation value of horizontal station velocity vector at ITRF 2000 (95%).

The result of our data processing (Fig. 7 and Table 5) is similarly showing as the results of IGS using ITRF 2000

as main frame. Velocity directions of most IGS stations

are showing 111

to 120

exclude TSKB in Japan. Using

ITRF 2000 as main frame, the continent of Eurasian where

has the Korean Peninsula is about 33.13 mm per year of

115

41'04.61" motion. The movement of the Eurasian

Plate shows a clockwise rotation resulted from the press-

ing force of the Indian Plate exerting on the Eurasian Plate.

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