InSight Top Science Results

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    Detected First Quake on Another Planet

    InSight made the first-ever detection of quakes on the Red Planet. Its onboard seismometer has measured over 1,300 seismic events, and over 50 of them had clear enough signals for the team to derive information about their location on Mars. The largest cluster of high-quality events came from Cerberus Fossae, a region that shows evidence of geologically recent volcanism – within the last two million years. The instrument picked up all six of the largest events of the mission since the middle of 2021. The most recent one, in May 2022, had an estimated magnitude of 5, with vibrations reverberating through the planet for at least six hours.

    This high-resolution image captured by the Mars Exploration Rover Opportunity's panoramic camera highlights the puzzling rock outcropping that scientists are eagerly planning to investigate.
    InSight Starts Burying Seismometer's Cable: NASA’s InSight lander used a scoop on its robotic arm to begin trickling soil over the cable connecting its seismometer to the spacecraft on March 14, 2021, the 816th Martian day, or sol of the mission. Scientists hope insulating it from the temperature swings will make it easier to detect marsquakes. Credits: NASA/JPL-Caltech. Download image ›

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    References: Mars Seismic Catalogue, Insight Mission


    Shed Light on Three Mars Layers

    InSight gathered new information about Mars' three major layers – crust, mantle, and core. Scientists found that the crust beneath InSight is somewhat thinner than expected – about 15 to 25 miles (25 to 40 kilometers) thick, comprising three internal layers. The crust's top layer is about 6.2 miles (10 kilometers) thick, and less dense than the lower crust. Mars' core is molten and considerably larger than expected, about 1,120 miles (about 1,800 kilometers) in radius. The lower density means that there are lighter elements mixed with the molten iron, lowering its melting point. This helps explain how Mars’ core can still be molten despite having cooled considerably since its formation.

    InSight also investigated the upper mantle using seismic waves traveling through depths of about 500 miles (800 kilometers) before returning to the surface. The strong, cold outer shell, the lithosphere, is about 310 miles (500 kilometers) thick, above a relatively cool mantle, compared to Earth's mantle.

    Determining the composition and structure of the layers, and how quickly heat seeps out of them, helps us better understand the geologic history of Mars’ surface, and in particular its ability over time to support life.

    A Cutaway of InSight on Mars
    A Cutaway of InSight on Mars: In this artist's concept of NASA's InSight lander on Mars, layers of the planet's subsurface can be seen below and dust devils can be seen in the background. Credits: IPGP/Nicolas Sarter. Download image ›

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    Found Magnetic 'Ghosts' from an Old Electrical Field

    InSight carried the first-ever magnetometer instrument to the Martian surface, enabling it to detect magnetic signals. In its early history, Mars had electrical currents flowing inside its molten metal core as the planet cooled rapidly. That global magnetic field is gone, but it left behind ghosts: traces of this ancient field “frozen” in the crustal rocks. InSight’s magnetometer found that ancient rocks between 200 feet (61 meters) and several miles below ground are strongly magnetized. The crustal magnetization remnants are 10 times stronger than were expected based on measurements by orbiting spacecraft. In addition, scientists are intrigued by magnetic signals that vary from day to night and tend to pulse around midnight. One possibility: they're related to the solar wind's interaction with the Martian atmosphere.

    Artist's Conception of the Magnetic Field Environment at Mars
    Artist's Conception of the Magnetic Field Environment at Mars: Artist's conception of the complex magnetic field environment at Mars. Credits: Anil Rao/Univ. of Colorado/MAVEN/NASA GSFC. Download image ›

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    Studied Dust Devils and Other Atmosphere and Weather Data

    InSight collected the most comprehensive weather data of any mission sent to the surface of Mars. Its sensors have detected thousands of passing dust devils, but the spacecraft's cameras have not yet seen any of them. Instead, the spacecraft’s pressure sensor records pressure dips from the “eyes” of these whirlwinds, and the seismometer can feel the surface tilt as they tug on the surface, like a giant vacuum cleaner.

    In addition to sensing winds, InSight observed such atmospheric features as weather fronts, dust storms, turbulence, infrasound, and bore waves, providing a much more complete look at the planet's sometimes surprising phenomena.

    Clouds Over SEIS
    Clouds Over SEIS: Clouds drift over the dome-covered seismometer, known as SEIS, belonging to NASA's InSight lander, on Mars. Credits: NASA/JPL-Caltech. Download image ›

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    References: The atmosphere of Mars as observed by InSight

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