The Apollo seismometers measured lots of seismic activity, from meteorite-induced vibrations to rumbles as the cold crust expanded once the Sun began shining at the end of a lunar night. The relatively small size of the Moon's fault scarps is in line with the more subtle contraction expected from a partially molten scenario. Another $1 billion will be used to build human lunar landing systems "three years earlier than previously envisioned to bring humans to the Moon's surface by 2024", the budget amendment stated. Instead, the Moon would contract as it loses heat, causing the land to rift and crack along faults.
"We found that a number of the quakes recorded in the Apollo data happened very close to the faults seen in the LRO imagery", said co-author Dr. Nicholas Schmerr, a geologist at the University of Maryland.
Stuff.co.nz writes that six of the eight moonquakes recorded near the faults took place when the Moon was at its farthest point from Earth in its orbit. Tectonic pushing and pulling of the moon's crust also resulted in lobate scarps (curved hills) and graben (shallow trenches).
NASA is planning on sending the first woman ever and the first man in almost five decades to the moon by 2024, thanks to an additional increase to the agency's budget by US President Donald Trump.
Geologic processes, like your mother, are both fundamentally responsible for life as we know it and probably something you don't think about very much.
On Earth the shallow quakes - the type produced by tectonic faults - would have ranged in magnitude from about 2 to 5 on the Richter scale.
The Moon's cooling interior temperatures have caused the lunar orb to shrivel by 150ft (50m) over hundreds of millions of years.
Jim Bridenstine said the history of moon landings shows little opportunities were offered to women, but described the current crop of astronauts as "very diverse".
The space agency chief was speaking after US President Donald Trump announced an additional $1.6 billion to go towards accelerating the lunar programme.
To check their findings, researchers ran 10,000 simulations to see if this amount of quakes near faults can be coincidental, however, they found the chances are less than 4 per cent. These images show that there are boulders at the bottom of bright patches on the slopes of the faults.
According to the Office of Management and Budget, the extra money for the moon mission would come from surplus funding for Pell grants, the financial aid program for low-income college students. These faults resemble small stair-shaped cliffs, or scarps, when seen from the lunar surface.
This research was funded by NASA's LRO project, with additional support from the Natural Sciences and Engineering Research Council of Canada.
NASA also released a William Shatner-narrated promotional clip to explain its integrated moon-Mars goals this week, optimistically punctuated by the tagline "We are going".