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Estimating present‐day postglacial rebound and horizontal movements in Fennoscandia By Repeated GPS Campaigns in 1993 and 1997
Author(s) -
Pan Ming,
Sjöberg Lars E.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900057
Subject(s) - geology , geodesy , baltic shield , shield , baltic sea , global positioning system , post glacial rebound , slip (aerodynamics) , seismology , sea level , oceanography , tectonics , paleontology , telecommunications , physics , computer science , thermodynamics
A well‐known geophysical phenomenon, the postglacial rebound in Fennoscandia, is investigated by data from the Baltic Sea Level Project GPS Campaigns in 1993 and 1997. Preliminary results indicate that the estimated uplift rates vary from 1 mm yr −1 to 11 mm yr −1 with standard errors of the order of 1–3 mm yr −1 , which is partly consistent with traditional terrestrial data. In addition, there is a horizontal component of plate motion of 21±1 mm yr −1 towards northeast. After subtracting the average velocity, differential horizontal velocities suggest that there is a right‐hand strike slip fault with a relative velocity of about 1.5±0.5 mm yr −1 along a N‐S direction in the middle of the Baltic Sea, which agrees with some geologists' belief of N‐S trending 1.9–1.8 Ga old strike‐slip megashears in the Baltic shield.