See the posted description for the talk below.
Ian Garrick-Bethell: The Search for a Lunar Dynamo
OVERVIEW: Since the Luna 1 flyby of the Moon in 1959, it has been known that the Moon does not presently possess a global magnetic field like the Earth’s. However, during the Apollo era it was discovered that lunar rocks are magnetized and the lunar crust contains strong magnetic anomalies. The origin of this magnetism continues to be debated. The two leading explanations are an ancient core dynamo and a process related to the impact of meteoroids. The existence of an ancient core dynamo would have implications for the thermal history of the Moon and the generation of planetary dynamos in general. By carefully studying the magnetic remanence carried by one of the most ancient and pristine lunar rocks, we have found evidence of a core dynamo on the early Moon.
SPEAKER BIO: Dr. Garrick-Bethell is a postdoctoral research associate at Brown University. He obtained his Ph.D. from the Massachusetts Institute of Technology in 2009. His work focuses on lunar geophysics and paleomagnetism.
WHEN:Tuesday, January 19, 2009. 9:00 AM Pacific/ 17:00 GMT
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