## Claim CD701.1:

Cowling's theorem proves that the dynamo theory of earth's magnetic field
is wrong.
### Source:

Barnes, Thomas G., 1973. *Origin and destiny of Earth's magnetic field*,
ICR Technical Monograph No. 4.

## Response:

- Cowling's theorem proves that an axially symmetric field cannot be
maintained through a self-sustaining dynamo by an axially symmetric
current. However, this theorem is limited to special cases. A
symmetric field can be generated, for example, by nonuniform convection
(Cowling 1981).

## References:

- Cowling, T. G., 1981. The present status of dynamo theory.
*Annual
Review of Astronomy and Astrophysics* 19: 115-135.

created 2001-2-18