Fróðskaparrit - 01.01.1971, Qupperneq 4

12
Additional Gravity Observationí in The Faroe Islands
nal stations in the Tórshavn area. In Fig. 2 the actual areas
are indicated.
The gravimetric observations have been reduced in the usual
manner. The geographical coordinates have been computed
from the topographic maps in the scale of 1:20 000. The ele-
vations of the stations are given in metres. A density value
of 2.67 g/cm3 has been employed. Theoretical gravity has been
taken from the tables published by Andersen (1956). Terrain
corrections are computed according to Hammer (1939) and
Bible (1962). In the time-consuming computation of topo-
graphic corrections topographic maps in the scale of 1:20 000
and 1:100 000, besides sea-charts of the Faroeish Sea in the
scale of 1:100 000, have been used. The computations have
been carried out for the zones A to M. In the following table
we have given the number of the gravity stations, the number-
ing following the previous lists, the geographical coordinates,
the elevations in metres, measured gravity referred to Tórs-
havn 1 = 982.10833 Gal (based on Buddinge G = 981.55800
Gal), Free Air anomaly, ordinary Bouguer anomaly, and
Bouguer anomaly including topographic correction, the ano-
malies expressed in mGal.
In the table is included Vágar 8. The geographical coordi-
nates and the deviation have been changed as a mistake was
made during the 1964 season.