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Good morning RP. Today's Astronomy Picture of the Day is titled "Moonquakes Surprisingly Common." Seismometers left on the Moon by the Apollo missions have recorded frequent moonquakes within 100km (~62 mi) of the surface. They are strong enough to move furniture in a future lunar apartment (only 1/6 of the gravity of Earth) and continue to vibrate long after the tremors would have subsided on Earth (due to denser lunar subsurface rock). Astronaut Buzz Aldrin stands beside the first seismometer deployed. Perhaps his canteen isn't too far away.
Astronomy Picture of the Day
Posted from apod.nasa.gov
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Posted >1 y ago
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Good Morning Bill and thanks for the Astronomy Picture of the Day "Moonquakes Surprisingly Common." Sorry I've been tardy these last several days - been estremely busy with projects on multiple fronts - playing catch up once again. Enjoiy your Sunday Maj William W. 'Bill' Price
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Thank you, my friend Maj William W. 'Bill' Price for posting the Astronomy Picture of the Day for Sunday, July 21, 2019 entitled "Moonquakes Surprisingly Common."
Image: Moonquakes Surprisingly Common - Image Credit - NASA, Apollo 11 Crew
"Explanation: Why are there so many moonquakes? Analyses of seismometers left on the moon by the Apollo moon landings reveals a surprising number of moonquakes occurring within 100 kilometers of the surface. In fact, 62 moonquakes were detected in data recorded between 1972 and 1977. Many of these moonquakes are not only strong enough to move furniture in a lunar apartment, but the stiff rock of the moon continues to vibrate for many minutes, significantly longer than the softer rock earthquakes on Earth. The cause of the moonquakes remains unknown, but a leading hypothesis is the collapse of underground faults. Regardless of the source, future moon dwellings need to be built to withstand the frequent shakings. Pictured here 50 years ago today, Apollo 11 astronaut Buzz Aldrin stands beside a recently deployed lunar seismometer, looking back toward the lunar landing module."
FYI SPC Margaret Higgins SP5 Jeannie Carle Maj Robert Thornton SSG Donald H "Don" Bates SGT Mark Rhodes SGT Mark Anderson Maj Bill Smith, Ph.D. CMSgt (Join to see) MSG Andrew White SFC William Farrell SGT (Join to see) Sgt Albert Castro SSgt Boyd Herrst SGT Charles H. Hawes SSG Martin Byrne PO1 William "Chip" Nagel CPT Gabe SnellLTC Greg Henning
Image: Moonquakes Surprisingly Common - Image Credit - NASA, Apollo 11 Crew
"Explanation: Why are there so many moonquakes? Analyses of seismometers left on the moon by the Apollo moon landings reveals a surprising number of moonquakes occurring within 100 kilometers of the surface. In fact, 62 moonquakes were detected in data recorded between 1972 and 1977. Many of these moonquakes are not only strong enough to move furniture in a lunar apartment, but the stiff rock of the moon continues to vibrate for many minutes, significantly longer than the softer rock earthquakes on Earth. The cause of the moonquakes remains unknown, but a leading hypothesis is the collapse of underground faults. Regardless of the source, future moon dwellings need to be built to withstand the frequent shakings. Pictured here 50 years ago today, Apollo 11 astronaut Buzz Aldrin stands beside a recently deployed lunar seismometer, looking back toward the lunar landing module."
FYI SPC Margaret Higgins SP5 Jeannie Carle Maj Robert Thornton SSG Donald H "Don" Bates SGT Mark Rhodes SGT Mark Anderson Maj Bill Smith, Ph.D. CMSgt (Join to see) MSG Andrew White SFC William Farrell SGT (Join to see) Sgt Albert Castro SSgt Boyd Herrst SGT Charles H. Hawes SSG Martin Byrne PO1 William "Chip" Nagel CPT Gabe SnellLTC Greg Henning
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