+ 1970 News Releases (7.6 Mb PDF file) - NASA

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MSC 70-27
The Passive Seismic Experiment (PSE) measures disturbances
produced by the Moon quakes and Meteoroid impact. The PSE will
record the cracking or seismic disturbances caused by the eclipse.
The Lunar Surface Magnetometer (LSM) will measure the magnitude
and direction of _he surface magnetic field effected by the eclipse.
The Lunar Ionosphere Detector and the Lunar Atmospheric Detector
will record changes_ if any, in the lunar ionosphere and atmosphere
which may be caused by the eclipse.
Solar Wind Experiment will measure any changes in the solar wind
which the eclipse may cause.
The eclipse_which occurs during lunar day,will cast a dark shadow
(Umbra) over _,he Moon for approximately one hour and a lighter shadow
(Penumbra)_which only partly cuts off vhe sunlight,will last for
approximately five hours. The temperature on the lunar surface is
expected to drop from 250 degrees (centigrade) to a m_nus 200 degrees
(centigrade).