A Gravity Survey of the Island of Maui, Hawaii 1 
W. T. Kinoshita and R. T. Okamura 
A BOUGUER ANOMALY CONTOUR MAP, based 
on gravity measurements made on the island of 
Maui during February 1962, is presented as 
Figure 1. The table of principal facts is reported 
elsewhere (Hawaii Inst. Geoph., 1965, Table 
2). Gravity measurements were made, using 
a LaCoste Romberg gravimeter, along most of 
the main roads and along a few foot trails at 
the summit of West Maui and inside Haleakala 
Caldera on East Maui. The relative inaccessi- 
bility of parts of the volcanoes, especially at 
the higher elevations, made the gravity station 
coverage sparse in those areas. Thus the depicted 
gravity contour pattern is strongly influenced by 
1 Publication authorized by the Director, U. S. Geo- 
logical Survey. 
the measurements made at the lower elevations. 
Most of the stations were located at bench 
marks or spot elevations published on standard 
1:24,000 scale U. S. Geological Survey topo- 
graphic quadrangle maps. A few stations- 
(U153, U155, U157, U159, U160, Ul6l, U204, 
U207, U208, U209) were established at identi- 
fiable points and plotted on topographic maps. 
The elevations of these stations were determined 
by altimetry. All of the gravity measurements: 
were made relative to a base station with an 
observed gravity value of 978,889.27 mgal 
which was established at the Kahului airport in 
1961 by R. R. MacDonald (personal commu- 
nication). The gravimeter was read at the base 
station at the beginning and end of each day,. 
Fig. 1. Complete Bouguer anomaly map of the island of Maui, Hawaii. 
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