NASA's InSight discovers the first "Quake" on Mars

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Mars InSight of NASA
Lander first measured and recorded a probable "Marsquake".

The weak seismic signal was recognized by the seismic of the lander
Internal Structure Experiment (SEIS)
Instrument, was added on April 6, the lander
128th Mars Day or Sol. This is the first tremor that has been recorded
seems to have come from within the planet, as opposed to forces
above the surface, like wind. Scientists are still investigating the data
determine the exact cause of the signal.

This video and audio illustrate a seismic event discovered by NASA's InSight on April 6, 2019, the 128th Martian Day or Sol of the Mission. There are three different types of noise, all of which are perceived as ground vibrations from the Seismic Experiment for Interior Structure (SEIS): there are sounds from the Martian wind; the seismic event itself; and the robot arm of the spaceship as he moves to take pictures.

"The first readings of InSight continue the science so
began with NASA's Apollo missions, "said InSight Principal Investigator
Bruce Banerdt of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.
"So far, we have collected background noise, but this first event
officially opens a new field: Marsseismologie! "

The new seismic
The event was too small to provide solid data on the Martian interior
the main goals of InSight. The Martian surface is extremely quiet
SEIS, the specially designed InSight seismometer, to absorb weak rumble. in the
In contrast, the earth's surface is constantly trembling with seismic noise generated by it
Oceans and weather. An event of this size in Southern California would be lost
Dozens of tiny crackles that occur every day.

"The Martian Sol 128 event is exciting because of its size and size
longer duration matches the profile of the moonquakes discovered on the lunar surface
during the Apollo missions, "said Lori Glaze, Planetary Science Division
Director at NASA Headquarters.

NASA
Apollo astronauts installed five seismometers measuring thousands of quakes
During operation on the moon between 1969 and 1977, seismic activity became visible
On the moon. Different materials can change the speed of seismic waves
reflect them so that scientists can use these waves to learn more about the
Inside of the moon, modeling his formation. Currently, NASA is planning this
Take the astronauts back to the moon by 2024 and lay them down
the foundation that will ultimately enable human exploration of Mars.

Sight & # 39; s
Seismometer, that of the lander placed on the
the surface of the planet
on 19 December 2018 will be activated
Scientists to collect similar data about Mars. By studying the deep inside of
Mars, they hope to experience how other rocky worlds, including Earth and Moon,
educated.

Three more seismic signals occurred on March 14 (Sol 105) in April
10 (Sol 132) and April 11 (Sol 133). detected
SEIS & # 39; s more sensitive Very Broad Band sensors,
These signals were even smaller than the Sol 128 event and were ambiguous at origin. The team will continue to study these events to try
determine their cause.

Regardless of the cause, the Sol 128 signal is exciting
Milestone for the team.

"We were
Wait months for a signal like this, "said Philippe Lognonné, SEIS team leader at the Institute of Physics of the Globe of Paris (IPGP) in France." It's so exciting. "
finally the proof that Mars is still seismically active. We are looking forward to it
to share detailed results as soon as we had the opportunity to analyze them. "

Most people are familiar with Earthquakes that occur on Earth
to errors caused by the movement of the tectonic plates. Mars and Moon do not have it
tectonic plates, but they are still experiencing quakes – in their cases caused by a
Continuous cooling and contraction process that creates stress. This stress
builds up over time until it is strong enough to break the crust, causing
Quake.

Recognizing these tiny quakes required a great deal of effort
Engineering. High quality seismometers are often included on Earth
Underground vaults to isolate them from temperature and weather changes. Sight & # 39; s
Instrument has several ingenious insulating
barriers
including a cover created by JPL called Wind and Thermal
Shield to protect it from the extreme and extreme temperature fluctuations of the planet
winch

SEIS has exceeded the expectations of the team in terms of its expectations
Sensitivity. The instrument was provided for InSight by the French region
Agency, Center National d 'Études Spatiales (CNES), during this first seismic
Events were identified by
The Marsquake Service Team of InSight, led by the Eidg
Technology.

"We
We are happy about this first achievement and strive to make many similar
Measurements with SEIS in the coming years, "said Charles Yana, SEIS
Mission Operations Manager at CNES.

JPL manages InSight for NASA
Directorate Science Mission. InSight is part of NASA's Discovery Program.
managed by the agency's Marshall Space Flight Center in Huntsville, Alabama.
Lockheed Martin Space in Denver built the InSight probe, including her
Cruise Stage and Lander and supports the use of spacecraft for the mission.

A number of European partners,
including CNES and the German Aerospace Center (DLR) support the InSight
Mission. CNES provided the SEIS instrument
NASA, with the lead investigator at the IPGP. Essential contributions for
SEIS came from IPGP; the Max Planck Institute for Solar System Research in
Germany; the Swiss Federal Institute of Technology (ETH Zurich) in Switzerland;
Imperial College London and Oxford University in the UK; and JPL.
DLR supplied the Heat Flow and Physical Properties package (HP3)
Instrument, with significant contributions from the Space Research Center of
the Polish Academy of Sciences and Astronics in Poland. Spain's Centro de
Astrobiología provided the temperature and wind sensors.

Listen to audio of this probable Marsquake:

https://youtu.be/DLBP-5KoSCc

For more information about InSight, see:

https://www.nasa.gov/insight

More information about Moon to Mars the agency
Activities, visit

https://www.nasa.gov/topics/moon-to-mars

News media contact

Dwayne Brown / Alana Johnson
Headquarters, Washington
202-358-1726 / 202-358-1501
dwayne.c.brown@nasa.gov / alana.r.johnson@nasa.gov

Andrew good
Jet Propulsion Laboratory, Pasadena, California
818-393-2433
andrew.c.good@jpl.nasa.gov

2019-071

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