Geomagnetic anomalies caused by a man-made lake

Davis P.M. and Stacey F.D. (1972) Geomagnetic anomalies caused by a man-made lake. Nature, 240 5380: 348-349. doi:10.1038/240348a0


Author Davis P.M.
Stacey F.D.
Title Geomagnetic anomalies caused by a man-made lake
Journal name Nature   Check publisher's open access policy
ISSN 0028-0836
Publication date 1972
Sub-type Article (original research)
DOI 10.1038/240348a0
Volume 240
Issue 5380
Start page 348
End page 349
Total pages 2
Subject 1000 General
Abstract TECTONOMAGNETISM - the study of magnetic anomalies due to tectonic stresses - is attracting increasing interest as a method of monitoring local changes in Earth stress1. The most important aspect is the search for the seismomagnetic effect; no convincing observation has yet been reported, although calculations2,3 indicate that in many cases it must be of measurable magnitude, and observations of magnetic precursors to creep increments on the San Andreas fault4 encourage the view that magnetic effects of earthquakes themselves are observable. Local magnetic changes preceding and accompanying volcanic eruptions in New Zealand are very striking5,6 and indicate that substantial stresses are associated with eruptions; a quite different pattern of volcanomagnetic changes in Hawaii (P. D., F. S., Jackson and Field, to be published) suggests that Kilauea volcano is highly fragmentednd a incapable of supporting a large scale stress pattern. But both volcanic eruptions and the San Andreas creep increments are very imperfectly understood so that a large scale control experiment which demonstrates quantitatively the role of the piezomagnetic effect in producing local magnetic anomalies is very desirable. The requirement is satisfied by the water loads imposed on underlying strata by man-made lakes, which provide large scale Earth stresses of sufficient intensities to produce measurable magnetic anomalies. Recent completion of a new dam at Talbingo in the Snowy Mountains of SE Australia and rapid filling of the reservoir provided an opportunity to observe this effect.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 12 Jul 2016, 01:36:49 EST by System User