The sound was captured by Insight when a meteoroid struck Mars on September 5, 2021. It was the first of four confirmed meteoroids between 2020 and 2021 that InSight's seismometer has detected since landing on 2018.
Here's NASA's explanation for the space rocks that make a "bloop" sound: "After sunset, the atmosphere retains some heat accumulated during the day. Sound waves travel through this heated atmosphere at different speeds, depending on their frequency. As a result, lower-pitched sounds arrive before high-pitched sounds. An observer close to the impact would hear a "bang," while someone many miles away would hear the bass sounds first, creating a "bloop.""
InSight detected the seismic and audio waves from a distance of between 53 and 180 miles (85 and 290 kilometers) away. The lander was located in the Mars region called Elysium Planitia.
Scientists calls space rocks 'meteoroids' before they hit the ground and 'meteorites' after they reach the ground.
NASA scientists are using seismic and acoustic wave data from InSight to locate newly formed craters on Mars.
After estimating the impact site, NASA's Mars Reconnaissance Orbiter flew over the location to confirm the spots and took close-up images of the craters using its HiRISE (High-Resolution Imaging Science Experiment) camera.
InSight now has nearly four years of seismic data that scientists plan to explore – using newly confirmed seismic signatures – for other impact events that may have been obscured by noise from wind or by seasonal changes in the atmosphere.
Scientists are using marsquakes to study the planet's crust, mantle and core. The four confirmed meteoroid impacts had a magnitude of under 2.0, giving them only enough to examine Mars' crust. A quake with a magnitude of 5, as happened in May 2022, can also expose details about the deeper mantle and core.
France's space agency, the Centre National d'Études Spatiales, provided InSight's seismometer. It is capable of detecting seismic waves from thousands of miles away.