NASA has been using its seismometer to measure Mars earthquakes since the beginning of the year.
This is the first time that a meteorite impact has been seen on another planet.
Imagine a racket. The nature of the sound was not known at the time.
It's more like a "bloop" than a "bam!" said science writer Corey Powell.
The first of the four impacts was confirmed back in September of 2021.
NASA has a short explainer video on its website or you can listen to the soundbite on its website.
The study was published in the journal Nature Geoscience.
After the September 5 meteorite slammed into the Mars surface, NASA sent its Mars Reconnaissance Orbiter to take pictures of the craters.
You can see the closeups of the impacts in the NASA release.
NASA says that detecting more meteorites on Mars is difficult due to wind noise and seasonal changes in the atmosphere.
The discovery of the September 5 impact allowed scientists to retroactively detect three more impacts as far back as May 2020.
The discovery of the impacts will help map out Mars' past.
The lead author said that the impact is the clock of the solar system To estimate the age of different surfaces, we need to know the impact rate.
NASA seems really excited about finding organic matter on Mars.
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