Researchers working with InSight data located six new Marsquakes that have helped them solve the Martian dichotomy.
Elevation data of Mars featuring the lower elevations of the northern lowlands primarily in blue and the much higher elevations of the southern highlands primarily in orange and red.
The northern hemisphere is a vast, smooth plain with a thinner crust and fewer craters. It is also less magnetized than the south. Either way, the dichotomy is fundamental to understanding Mars. We can’t understand the planet’s evolution without revealing the mystery behind the dichotomy. This is why NASA and the DLR launched theThe lander’s name stands for Interior Exploration using Seismic Investigations, Geodesy. SEIS helped scientists better understand Marsquakes by detecting and measuring hundreds of them. It also
This research is based on a cluster of Marsquakes in the Terra Cimmeria region of the southern highlands. “We analysed waveform data from so-called low frequency marsquakes captured by NASA’s InSight seismograph on Mars,” Professor Tkalcic said. “In doing this, we located a cluster of six previously detected, but unlocated marsquakes in the planet’s southern highlands, in the Terra Cimmeria region.
The researchers worked with InSight’s seismic data and improved the signal-to-noise ratio. That improvement allowed them to pinpoint the locations of the marsquakes. “Here, we improve the signal-to-noise ratios and determine the locations of the low-frequency marsquakes recorded during the InSight mission. We find a new cluster of marsquakes in Terra Cimmeria, Southern Highlands, in addition to those previously located in Cerberus Fossae, Northern Lowlands,” they write.
Such a large difference in Q between regions indicates that the subsurfaces are substantially different from one another. Temperature and mantle convection could be the key. “The attenuation difference might be linked to the temperature differences between the two hemispheres, along with more vigorous convection beneath the Southern Highlands,” the paper states.
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