The faint rumble characterised by JPL scientists as a likely marsquake, roughly equal to a 2.5 magnitude quake, was recorded on April 6, the lander's 128th Martian day. I've detected some quiet but distinct shaking on #Mars.
Given the time taken to make this first detection, it might suggest InSight should record another dozen or so seismic signals in the initial operating period, explained Prof Pike.
The suspected seismic event on the Red Planet was recorded using silicon sensors developed in the UK.
NASA's InSight lander may have detected its first quake on Mars, the space agency has announced.
Between 1969 and 1977, five seismometers installed by Apollo astronauts measured thousands of quakes, shedding light on the moon's seismic activity.
InSight's goal is to use seismic monitoring and underground temperature readings to unlock mysteries about how Mars formed and, by extension, the origins of the Earth and other rocky planets of the inner solar system.
"InSight's first readings carry on the science that began with NASA's Apollo missions", said the mission's Principal Investigator Bruce Banerdt.
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"We've been collecting background noise (on Mars) up until now, but this first event officially kicks off a new field: Martian seismology!"
Mars is not almost as geologically active as Earth and, like our moon, lacks tectonic plates.
As these vibrations move through the Red Planet, they bump into and reflect off of different materials underground. InSight is now less than six months into its two-year primary mission, so we can expect to see many additional discoveries in the coming months.
Smaller seismic signals were detected on Mars in March and April, but researchers aren't sure about their origin, and they are being studied. InSight's instrument has several ingenious insulating barriers, including a cover built by JPL called the Wind and Thermal Shield, to protect it from the planet's extreme temperature changes and high winds.
Even though it's still unknown what caused the quake, scientists at NASA and the National Centre for Space Studies (CNES) - the French apex space agency - have determined that the quakes are more moon-like in nature than similar to earthquakes.
Sadly, the Sol 128 event was too faint to tell scientists anything about the structure of Mars's interior, and here on Earth it would have been lost among the constant grumblings of tectonic activity.
The team said they were still working to confirm the cause of the tremor, picked up on April 6, and ensure it came from the planet´s interior rather than wind or noise distortion.