InSight: First Marsquake recorded?

First marsquake recorded?
of Stefan Deiters
astronews.com
April 24, 2019

The seismometer aboard NASA Marsander InSight knnte
Recorded the first Marsquake in early April. If the suspicions were confirmed, it was the first time that an earthquake was recorded on Mars, which was recorded in
The interior of the planet has its origin. Such measures are promising
the researchers give new information on the internal structure of the red planet.

The weak signal came from Seismic experience for interior structure
(SEIS) registered on April 6, 2019 on the 128th Marst of the Lander InSight sure
the surface of the red planet. For the first time, it's a signal
apparently not by phenomena on the surface of the
Mars explains, for example, by the wind. Scientists are still
engaged in signal badysis to determine the origin with more precision
can.

"DISCOVERIES the first steps are practically the continuation of science,
the with the ApolloNASA's missions have been launched, "said Bruce Banerdt of
jet
Propulsion laboratory NASA, the scientist responsible for InSightMission.
"Up to now, we have only collected background noise, but now, with the first
good signal, practically opens a new scientific field: seismology on
to Mars. "

This first very weak seismic signal was still too weak for
I'm sure I can deduce something from inside the red planet. exactly
but that's the reason you're with InSight first with a seismometer
taken on Mars. Seismologically, Mars is extremely calm,
this is why the seismometer has the least impact on the surface
can register. On Earth, the signal would be as weak as SEIS now
measured in many other oceanic torrents and
Meteorological phenomena fixed.

"The March 128 event is so exciting because it's in Strke
and the duration looks like the moonquake that occurs during the Apollo-Missions on the
The surface of the moon has been measured, "said Lori Glaze of Planetary Science Division
at NASA headquarters. During the ApolloLunar missions totaled five
Seismometers were installed on the lunar surface between 1969 and
1977 several thousand recorded earthquakes.

Three other seismic signals were detected with SEIS, however
were even weaker and whose origin is still completely unexplained. The signal
March 128 is therefore an important step for the team, enough
regardless of what this finally triggered. "We have for months
wait for a signal like this, "says Philippe Lognonn, head of the department
SEIS teams in Institute of Physics of the Globe of Paris (IDAPB). "It's awesome
to finally have the proof that Mars is still active on the seismic plan ".

Earthquakes are usually caused by displacements
tectonic plates. Such plate tectonics do not exist on the Moon and on Mars.
However, these bodies are still cooling, which makes them gradually shrink.
This creates tension that can eventually cause tremors.

Measuring such tremors is not an easy task because the measuring device
must be well protected from other shocks. So is
For example, SEIS is placed under a dome-shaped protective coating that the
Instrument protects against wind but also temperature variations. The path
the sensitivity obtained on the surface of Mars is even higher than that of the team
had been planned in advance.

In one Video, that
can also be seen on Youtube, have been registered by SEIS
The shocks are audible.