Impact-Seismic Investigations of the InSight Mission

Daubar, I. J.; Lognonné, Philippe; Teanby, N. A.; Miljković, K.; Stevanović, Jennifer; Vaubaillon, Jérémie; Kenda, B.; Kawamura, Taïchi; Clinton, John; Lucas, Antoine; Drilleau, M.; Yana, Charles; Collins, G. S.; Banfield, Don; Golombek, M. P.; Kedar, S.; Schmerr, N. C.; Garcia, Raphaël; Rodríguez, S.; Гудкова, Т. В.; May, Stefan; Banks, M. E.; Maki, J. N.; Sansom, Eleanor K.; Karakostas, Foivos; Panning, M. P.; Fuji, Nobuaki; Wookey, James; Driel, Martin van; Lemmon, M. T.; Ansan, V.; Böse, Maren; Stähler, Simon C.; Kanamori, Hiroo; Richardson, James E.; Smrekar, S. E.; Banerdt, W. B.

doi:10.1007/s11214-018-0562-x

Cited by 56 publications

(121 citation statements)

References 152 publications

(253 reference statements)

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“…Carlo algorithm is used to sample solutions (that is, physical configurations) of the inverse problem that both fit the observations within errors and satisfy known (or assumed) physical a priori constraints. We employ a Bayesian probabilistic procedure developed 50 and tested for prelaunch works 39,40,42 .…”

Section: Methodsmentioning

confidence: 99%

“…Even though large quakes with multiple surface wave arrivals [39][40][41] or located impacts 42 have not yet been detected, SEIS already constrains the Martian crust and utilizes a new source of seismic information through the interaction of the Martian atmosphere with the ground. SEIS data confirm, with both compliance and RFs, a thin (few metres) regolith layer over a more competent layer in the vicinity of the lander.…”

Section: First Seismic Constraints On the Martian Crustmentioning

confidence: 99%

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Constraints on the shallow elastic and anelastic structure of Mars from InSight seismic data

et al. 2020

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T he Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission landed on Mars on 26 November 2018 in Elysium Planitia 1,2 , 38 years after the end of Viking 2 lander operations. At the time, Viking's seismometer 3 did not succeed in making any convincing Marsquake detections, due to its on-deck installation and high wind sensitivity. InSight therefore provides the first direct geophysical in situ investigations of Mars's interior structure by seismology 1,4. The Seismic Experiment for Interior Structure (SEIS) 5 monitors the ground acceleration with six axes: three Very Broad Band (VBB) oblique axes, sensitive to frequencies from tidal up to 10 Hz, and one vertical and two horizontal Short Period (SP) axes, covering frequencies from ~0.1 Hz to 50 Hz. SEIS is complemented by the APSS experiment 6 (InSight Auxiliary Payload Sensor Suite), which includes pressure and TWINS (Temperature and Winds for InSight) sensors and a magnetometer. These sensors monitor the atmospheric sources of seismic noise and signals 7. After seven sols (Martian days) of SP on-deck operation, with seismic noise comparable to that of Viking 3 , InSight's robotic arm 8 placed SEIS on the ground 22 sols after landing, at a location selected through analysis of InSight's imaging data 9. After levelling and noise assessment, the Wind and Thermal Shield was deployed on sol 66 (2 February 2019). A few days later, all six axes started continuous seismic recording, at 20 samples per second (sps) for VBBs and 100 sps for SPs. After onboard decimation, continuous records at rates from 2 to 20 sps and event records 5 at 100 sps are transmitted. Several layers of thermal protection and very low self-noise enable the SEIS VBB sensors to record the daily variation of the

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Section: Methodsmentioning

confidence: 99%

Section: First Seismic Constraints On the Martian Crustmentioning

confidence: 99%

Constraints on the shallow elastic and anelastic structure of Mars from InSight seismic data

et al. 2020

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“…These recent dated impacts also allow measurement of the current cratering rate (Daubar et al, ), which has been used to predict the overall rate of impact‐induced seismic activity on Mars (Teanby, ; Teanby & Wookey, ). InSight will provide a valuable additional in situ measurement of the current cratering rate, unbiased by surface properties such as dust cover (Daubar et al, , ).…”

Section: Introductionmentioning

confidence: 99%

Recently Formed Crater Clusters on Mars

et al. 2019

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This study maps and measures assorted properties of new dated crater clusters that formed recently when impactors fragmented in the atmosphere of Mars. We report these statistics for 77 clusters: number of craters, size of cluster, dispersion of cluster, direction (azimuth) from which the impactor approached, and an estimate of the angle from vertical of the impact. Clusters range from a few to hundreds of craters, with most containing tens of craters. They are most commonly dispersed over hundreds of meters, with extents ranging from a few meters to a few kilometers. We find that dispersion generally does not correlate with topographic elevation. However, when the highest elevations are disregarded, clusters are more dispersed at lower elevations, as expected. Impact azimuths are randomly distributed and do not express a clear directionality of incoming meteoroids. Results suggest impacts occur closer to horizontal than expected, which could be due to observational effects. The characteristics we report here provide important constraints for future work in understanding atmospheric fragmentation processes; properties of the impactors themselves, such as density and orbital parameters; and the seismic detectability of impacts. These are critical aspects to understand, as approximately half of current impacts are observed to be clusters.

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“…The impact catalog is based on Teanby (2015) and the size distribution of observed newly dated craters (Daubar et al, 2018), again assuming a globally random distribution. To ▴ Figure 1.…”

Section: Overview Of the Test Data Setmentioning

confidence: 99%

Preparing for InSight: Evaluation of the Blind Test for Martian Seismicity

Driel

Ceylan

Clinton

et al. 2019

Seismological Research Letters

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In December 2018, the National Aeronautics and Space Administration (NASA) Interior exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission deployed a seismometer on the surface of Mars. In preparation for the data analysis, in July 2017, the marsquake service initiated a blind test in which participants were asked to detect and characterize seismicity embedded in a one Earth year long synthetic data set of continuous waveforms. Synthetic data were computed for a single station, mimicking the streams that will be available from InSight as well as the expected tectonic and impact seismicity, and noise conditions on Mars (Clinton et al., 2017). In total, 84 teams from 20 countries registered for the blind test and 11 of them submitted their results in early 2018. The collection of documentations, methods, ideas, and codes submitted by the participants exceeds 100 pages. The teams proposed well established as well as novel methods to tackle the challenging target of building a global seismicity catalog using a single station. This article summarizes the performance of the teams and highlights the most successful contributions.

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Impact-Seismic Investigations of the InSight Mission

Abstract: Impact investigations will be an important aspect of the InSight mission. One of the scientific goals of the mission is a measurement of the current impact rate at Mars.

Cited by 56 publications

References 152 publications

Constraints on the shallow elastic and anelastic structure of Mars from InSight seismic data

Constraints on the shallow elastic and anelastic structure of Mars from InSight seismic data

Recently Formed Crater Clusters on Mars

Preparing for InSight: Evaluation of the Blind Test for Martian Seismicity

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