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UID:7537
LOCATION:Virtual
DTSTAMP:20220929T140000
DTSTART:20220929T140000
DTEND:20261009T012222
SUMMARY:WEBINAR: Lunar Seismology - Past\, Present\, and Future
DESCRIPTION:Please join us for the webinar: Lunar Seismology - Past\, P
 resent\, and Future on Thursday\, September 29 at 2:00 PM Eas
 tern.\n\nRegister here for this virtual event. After regist
 ering\, you will receive a confirmation email containing info
 rmation about joining the webinar.\n\nPresented By/Author: D
 r. Ceri Nunn\, NASA Jet Propulsion Laboratory\n\nAbstract: In 
 the late 1960s and early 1970s\, Apollo astronauts deployed s
 eismometers on the surface of the Moon. From 1969 to 1977\, t
 he seismometers recorded over 13\,000 events on the mid-perio
 d seismometers and many more on the short-period instruments
 . These events included moonquakes\, artificial impacts and m
 eteoroid impacts. Meteoroids have bombarded the Moon through
 out its history\, which has left a highly-fractured layer nea
 r the surface. Energy from seismic events is highly scattere
 d. The result is that lunar seismograms look very different 
 from terrestrial seismograms. The Apollo experiments\, and ma
 ny others\, transformed our understanding of the structure of
  the Moon. However\, many questions remain unanswered.\n\nThe F
 arside Seismic Suite (FSS) is a new lunar seismic mission de
 signed to answer some of these questions. The FSS will be de
 livered to Schrödinger Crater on the Moon's farside in 2025
 . Two seismometers will be deployed on the deck of a Commerc
 ial Lunar Payload Services (CLPS) lander. The FSS has three 
 primary science objectives:\n\n	To investigate the asymmetry b
 etween near and farside. The Apollo seismometers observed ve
 ry few moonquakes on the Moon’s farside. However\, since th
 e seismometers were deployed on the nearside\, farside events
  would be much harder to observe\, and the seismic energy may
  have been attenuated by a partial melt layer above the core
 . At the surface\, there are many asymmetries between the nea
 r and farside of the Moon. The mission will investigate the 
 asymmetries beneath the surface.\n	How do impact processes sh
 ape the lunar crust inside and outside Schrödinger Crater? 
 In particular\, we will determine the thickness of the crust 
 at this location and use it to improve the estimates of crus
 tal thickness for the whole Moon.\n	Seismic noise on the Moon
 \, known as the Lunar Background Hum\, is mainly driven by the
  impacts of micrometeorites. We will better constrain the im
 pact rate for the smallest micrometeorites using seismic noi
 se measurements.\n\nThis talk will briefly introduce lunar sei
 smology and discuss its past\, present\, and what we can hope 
 to learn in the future.\n\nAll IRIS webinars are archived f
 or later viewing on the IRIS YouTube channel (Webinars play
 list).\n\nAny questions? Contact us at webinar@iris.edu.
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