Tsuneji Rikitake – författare

Electromagnetism and the Earth''s Interior reviews the earth''s magnetic fields in terms of physical processes that are occurring in the earth''s interior. The book describes the distribution of the earth''s magnetic field in terms of declination, horizontal intensity, and vertical intensity. The dynamo theory concerns the self-exciting electric generation in the interior of the earth, and can account for any geomagnetic secular variation. A workable laboratory model—a dynamo mechanism of Lowes and Wilkinson (1963) has a significant role on the dynamo theory for the model actually demonstrated Herzenberg''s proof that was developed mathematically. The text also describes various aspects of long-term geomagnetic variations, such as the decrease in the dipole moment, the reversal of the geomagnetic field, the drift of eccentric dipole, the fluctuation in the length of day, and the geomagnetic secular variation. The book also investigates the possible effects of the ocean on geomagnetic variations. The characteristics of transient geomagnetic variations on islands can point to a possible special underground structure. The book is suitable for geologists, astrophysicists, seismologists, and students of the natural sciences.

A seminar on "Practical Approaches to Earthquake Prediction and Warning" was held in Tokyo and Tsukuba, Japan on November 7-11, 1983. This was the sixth seminar on earthquake prediction in the framework of the U.S.-Japan Cooperation in Science Program, a series that was initiated in 1964. The Japan Society for the Promotion of Science and the National Science Foundation of the U.S.A. sponsored the seminar. The U.S. Geological Survey gave substantial additional support by sen­ ding a number of scientists to the seminar. C. H. Scholz, Columbia University, and T. Rikitake, Nihon University, were the co-convenors on behalf of the U.S.A. and Japan, respectively. 23 Japanese and 23 American delegates and observers took part in the seminar. Forty papers were presented during the three days of scientific sessions at the Interna­ tional House of Japan, Roppongi, Tokyo, November 7-9. The other two days were spent on a field trip to Tsukuba Science City, where national laboratories engaged in earthquake prediction research and other aspects of earthquake hazard reduction have been established by several agencies of the Japanese Government. The program of the scientific sessions was organized according to the following topics: 1. The national programs of Japan and the U.S.A. 2. Theory and long-term earthquake prediction. 3. Strain and stress. 4. Observation systems. 5. Various precursors. 6. Social response, public policy and earthquake engineering.

A seminar on "Practical Approaches to Earthquake Prediction and Warning" was held in Tokyo and Tsukuba, Japan on November 7-11, 1983. This was the sixth seminar on earthquake prediction in the framework of the U.S.-Japan Cooperation in Science Program, a series that was initiated in 1964. The Japan Society for the Promotion of Science and the National Science Foundation of the U.S.A. sponsored the seminar. The U.S. Geological Survey gave substantial additional support by sen­ ding a number of scientists to the seminar. C. H. Scholz, Columbia University, and T. Rikitake, Nihon University, were the co-convenors on behalf of the U.S.A. and Japan, respectively. 23 Japanese and 23 American delegates and observers took part in the seminar. Forty papers were presented during the three days of scientific sessions at the Interna­ tional House of Japan, Roppongi, Tokyo, November 7-9. The other two days were spent on a field trip to Tsukuba Science City, where national laboratories engaged in earthquake prediction research and other aspects of earthquake hazard reduction have been established by several agencies of the Japanese Government. The program of the scientific sessions was organized according to the following topics: 1. The national programs of Japan and the U.S.A. 2. Theory and long-term earthquake prediction. 3. Strain and stress. 4. Observation systems. 5. Various precursors. 6. Social response, public policy and earthquake engineering.