Domenico Giardini

Abstract: The InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission landed in Elysium Planitia on Mars on 26 November 2018 and fully deployed its seismometer by the end of February 2019. The mission aims to detect, characterize and locate seismic activity on Mars, and to further constrain the internal structure, composition and dynamics of the planet. Here, we present seismometer data recorded until 30 September 2019, which reveal that Mars is seismically active. We identify 174 marsquakes, comprising two distinct populations: 150 small-magnitude, high-frequency events with waves propagating at crustal depths and 24 low-frequency, subcrustal events of magnitude M w 3–4 with waves propagating at various depths in the mantle. These marsquakes have spectral characteristics similar to the seismicity observed on the Earth and Moon. We determine that two of the largest detected marsquakes were located near the Cerberus Fossae fracture system. From the recorded seismicity, we constrain attenuation in the crust and mantle, and find indications of a potential low-S-wave-velocity layer in the upper mantle. Mars is seismically active: 24 subcrustal magnitude 3–4 marsquakes and 150 smaller events have been identified up to 30 September 2019, by an analysis of seismometer data from the InSight lander.

TL;DR: In this article, the authors performed regression analyses to convert all earthquake size information in ecos to physically meaningful moment magnitude M w by regional waveform inversion for 34 events in and near Switzerland.

TL;DR: In this article, the authors report their observations of common non-seismic signals as seen during the first 478 sols of the SEIS data, i.e. from landing until the end of March 2020.

TL;DR: In this paper, the authors presented damage scenarios for Basel (Switzerland) based on a microzonation study and on the distribution of buildings in different districts of the city.

TL;DR: In this article, a seismic moment of 5.38(±2.16)×1019 N m (Mw; = 7.1) was obtained for the 1908 Messina Straits earthquake.