Earthquake on Mars reaches record level and lasts 30 minutes

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Last week, NASA’s Insight spacecraft detected the largest earthquake ever recorded on Mars. The magnitude 5 earthquake occurred on May 4 and lasted about 30 minutes – much longer than the earthquake that hit Earth.

However, this was not the longest earthquake ever recorded on the Red Planet. In August 2021, InSight recorded a 4.2-magnitude earthquake that shook the Earth for 90 minutes. Until then, this was considered the largest of the 1,313 earthquakes detected by the probe, which has been operating since November 2018.

Earthquakes there are different

Earthquakes are caused by the movement of tectonic plates that collide, releasing huge amounts of energy and shaking the surface. But this is unique to us.

There are no outside plate tectonics here, leading scientists to suggest that Martian earthquakes are caused by the cooling of the planet’s interior. Essentially, the material in there ends up shrinking over time, increasing the external pressure, which is released through fractures in the cortex. This generates vibrations that are less intense than those seen on Earth, but for a much longer period.

Analysis of the earthquakes discovered by InSight can help scientists understand details about the red planet’s interior. When seismic waves pass through the material in Mars’ crust, mantle, and core, it changes. These changes allow seismologists to determine the depth and composition of the layers.

This type of study clarifies not only questions from Mars, but from all of the rocky worlds, which also include Mercury, Venus, Earth, and the Moon itself.

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