Absolute gravity measurements in California
Abstract
We have constructed an absolute gravity meter that determines the local gravitational acceleration by timing a freely falling mass with a laser interferometer. The instrument has made measurements at 11 sites in California, four in Nevada, and one in France. The uncertainty in the results is typically 10μGal (1 Gal ≡ 1 cm/s2; 1 μGal = 10-6 Gal = 10-8 m/s2). Repeated measurements have been made at several of the sites; only one shows a substantial change in gravity.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- August 1986
- DOI:
- 10.1029/JB091iB09p09135
- Bibcode:
- 1986JGR....91.9135Z
- Keywords:
-
- California;
- Gravimetry;
- Gravitation;
- Acceleration (Physics);
- Free Fall;
- Interferometers;
- Geodesy and Gravity: Crustal movements;
- Geodesy and Gravity: Standards and absolute measurements;
- Geodesy and Gravity: Instruments and techniques