Stanford University

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north america from space

Sonia Tikoo, Stanford University-Recent Advances in Lunar Magnetism

Thursday, May 6, 2021 12:00 PM
Where: pass code: 467202
General Public
Geophysics Department

Sonia Tikoo

Geophysics Department, Stanford University

Recent Advances in Lunar Magnetism

The ancient Moon generated a dynamo magnetic field that started no later than 4.25 billion years ago (Ga) and ceased sometime after 1.8 Ga.  During the period between approximately 3.85 and 3.56 Ga, the lunar surface field intensity may have sometimes rivaled that of the modern terrestrial field.  However, during the same period, Apollo-era lunar paleointensity studies indicate that the field may have fluctuated in intensity by an order of magnitude or more on <100 My timescales.  In this presentation, I will explore possible origins of variability in the lunar paleointensity record and discuss how they may be explained by various hypothesized lunar dynamo generation mechanisms. pass code: 467202

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